CA2112887A1 - Segmented guard bar - Google Patents
Segmented guard barInfo
- Publication number
- CA2112887A1 CA2112887A1 CA002112887A CA2112887A CA2112887A1 CA 2112887 A1 CA2112887 A1 CA 2112887A1 CA 002112887 A CA002112887 A CA 002112887A CA 2112887 A CA2112887 A CA 2112887A CA 2112887 A1 CA2112887 A1 CA 2112887A1
- Authority
- CA
- Canada
- Prior art keywords
- guard bar
- segments
- bar according
- tapered side
- space
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/4012—Housing details, e.g. for cartridges
- B26B21/4018—Guard elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B21/00—Razors of the open or knife type; Safety razors or other shaving implements of the planing type; Hair-trimming devices involving a razor-blade; Equipment therefor
- B26B21/40—Details or accessories
- B26B21/4012—Housing details, e.g. for cartridges
Abstract
2112887 9301918 PCTABS00019 Segmented guard bar wherein segments (70) of adjacent guard bars are tapered such that the skin flow through spaces between the segments is reduced. According to one preferred, illustrated embodiment, the distance between the rearward portion of adjacent segments (70) is less than the space between the forward portions of those segments. Though not limited to any specific type of razor, the present invention is particularly suited for use with a flexible razor head having a cap member (40), at least one and preferably two blades (50, 60) separated by a spacer (35), a blade seat (20) having a plurality of blade support portions (21) separated by corrugations (23), and a segmented guard bar with each segment (70) independently connected to the blade support portions (21).
Description
~ ~ 12~3'1 WO93/01918 PCT/~S92/0~6 SE~M~NTED G~ARD~BAR
The present invention is directed to a guard bar for a afety razor and, mor~ particularly, to a guard ~ar comprising a plurality of separate s~gm~nts at least one of which is designed to minimize the flo~ of skin through the space~ betwPen the segm~nts.
In recognition of the fact that ~urface~ being shaved ar~ not perfectly planar, a razor head comprising a cap, two blades s~parated by a spacer~ and a guard bar have been designed such that the entire razor head fl xes as a unit during shavîng. In order to maximize the fle~ibility of the blade ~eat, one design includes a guard ~r ormed of a plurality of discrete segments. Thes~
segm~nts are independently supported by the blade seat.
Adjacent se~ments of:the guard bar are thus separated by . spaces, This seqm~n~ed guard bar d~sign has prove~ very : ~uc¢ess~ul i~providing overall ~lexibility to the razor : h~ad without noticeable distortions to the blade geome~ry 20 : ~uri~g shavi~5- ~
~; The ~on~is~ent achieve~ent of a rlose, .
c~o~ortable sha~e~depends upon careful control of th~
blade geomet~y. To this end, the:pre~ent inv~ntion i5 directed to furth~r i~pro~emen~s in r~zor heads utili~ng eg~ented ~uard bars.
Those:skilled i~ the art appreciate that a guard bar, which is designed to be the fir~t ~lement of a safety razor to contact 'a given area during a shaving stroke, affects the manner in which the skin approaches the edg~
o~ the at blade. During a shaving stroke, skin typically flows over a guard bar and into th~ spare ; betw~en the ~uard bar and seat bla~e some distance below a tangent drawn from the top of the gu~rd b~r to khe blade e~ge~ The degree to which s~in may flow below such a ; : tangent linP depends upon the seat blade span, i.e. the distance between the guard bar and sea~ blade edge.
.
WO 93/~1918 ~ US92tO~46~
Though the spaces between segments of a segmented guard bar have been designed to minimize the amount of skin which is not actually contacted by the guard bar segments during a shaving stroke ~, varia~tioals in the skin flow may still result. The skin ~lowing through the spaces between the segments may contact the se~t ~lade edge at a different angle than the skin flowing over the guard bar segments. Additionally, when a ~lexible razor he~d having a segmented guard bar flexes in response to force~ encountered during shaving, the space between at least some o~ the segme~lts increases. This space irlcrease further increases l:he possibility of a non ~ unifor~ skin fl~w i~ediately forward of the ~orward hlade. A non-uni~orm skin fls~w ~ay advsrsely affect the com~ort of the shave.
It would therefore be desirable to pro~ide greater ~;kin f low con~rol te~ a ~egment:ed ~uard bar to ~urther ~inimize~and pref~ra~ly eli3~in~te po~ential : ~ 20 varlation~ in ~kin flow over a segmerlted guard bar and thereby proYide; :b~er con~rol of the blade geometr3r during sh~ving.
he p~esent i~v~nt:ion is directed to a s~g~ent~d guard bar with lmproved skin flow co~trolO Ace:ordinq to on~ illustrated embodiment, the space b~tween tl~e re2lr~ard portion of ~dj aeent segm~n~s i le~;s than the space b~tween th~ forw2rd po~ions o~ those segm~nt~.. Acc:ording to a second illustr~ted es~odimen~, the space be~een :: guard bar ses~ents is disposed at an angle t5:~ the dîrection o~ shaving th~reby preventing the uno~structed iElow of skin thro~lgh the space as the s3cin approached the 3~ ~orward blade. 5till further e~bodi~ents Q~ th~ present in~ntion irlclude }ateral extension positioned on the ; ~ sidewalls o~ guard bar segments in order to mir~imi~e or W093/01918 PCT/~IS92/0~6-block the flow of skin through the spaces Though not limited to any specific typ~ of razor, th~ present invention is particularly suited for use with a flexible razor hsad having a cap member, at least one and preferably two blades separated by a spacer, a blade seat having a plurality ~f blade ~upport portions separated by corrugations, and a segmented guard bar wlth each segment independently connected to the blade support portions.
rie~ Des~ription o~ The Drawin~
Figure 1 is a perspective view of a razor head of one embodiment of the pr~sent in~ention.
.
~igure 2 is a top view of the razor head illustrated in Figure 1.
Figure 3 is a front view of the razor head ~ lustrated in Figure 1.
:~ ~ 20 ~ :
Figur~ 4 is a bottom view of the razor head illustrated in Figure 1.
Figure ~ is an enlarged per~pec~ive view of a portion 25~ Of a blade support and ~ ard~bar of:t~e embodi~ent o8 ~the present invention illustrated in Figure 1.
~`~ Figure 6 is an enlar~ed perspeeti~ view o~ a portion ~: of a ~l~de support and guard bariof a second embodi~n~ o~
the pr~sent invention.
: Figure 7 i~ an enlarged perspective view o~ a por~ion of a blade ~uppor~ and guard ~ar of a third embodimen~ of : the pre ent lnvention.
:: ~
~:
: ~ .
WO 93f01918 PC~ Sg2/~
Figure 8 ~ s an enlarged perspective vi~3w o* a portion of a blade support and guard bar segmenlts o~ a fourth e~nbodi~ent o~E the presç~nt. imrention.
, D0tail~d_D~e~tlo~3 For purposes of illustration, the pre~ent inventior has beeTa illustrated and will be de~;~ribed herein in conjunction ~ith a ~lexible razor head. As used herain, thts ~erm ~Iraæor h~ad" iq m~ant to include both razor ¢ rtridg~s adaptQd to be utilized with a separate handl~, and the upp~r, operative elements of a disposable razor to which a hand}e is permanently a~tached. For ease o eacplanation, the present invention is described herein as ~: 15 ~ disposabl~ cdrtridg~ adapted or attac:hment to a separate razor. ~: ~
Fig~re 1 illu~tra~es a ~razor head o~ one em~odiment o~ the pre~n1:~ in~r~n~ion havi~g a blade ~eat 20t attac}~aer~ aembers 30,~ a cap member ~0, a cap blads 50 having sharpe~ed~ edge: 51, :a seat ~lade 60 ha~ring sharpened eds~ $1,: and~a~ ard bar Gomprising a plurali~y of ents 73.~ ~ q~e~ mann~r of corme~:tis~g the variou~
le~ents ~ay'be::with;t~e use of pins aæ disc:losed in l~.S.
25 ~ Pate~: ~O.~`4~,8~54,041 ;~o Chen, whic:h ie h~reby incorpor~ted by rsfQrenc:e. ~ Other m~t:hods ar6! a}so ~suitable withs~ut dep~rting fx~ the scope o~ th~ pr~sent irlven~ion. For eYd~ple, th~ cap; 40, blade support 20, b~ade spacer 35, a~d ~gmented, guard bar~m~y also be inteç~r.lly ~onned 30 around one or more blades ~y an inse~c moldislg proc~ss.
~ - ~
. : ~ : : :
The preserlt invention provides great~r skin flo~
c:orl'crc~l tAan pr~iously disclosed seg~ent~d guard bars by increasing the control of skin through the sp ce between 3~ ad~e~nt ~e~ents. The skin flow con~rol ~nembe~rs o~ one illu~:trated embodiment are best understood with re~ere~ce to Figures 1-5. As illustrated, blade seat 20 is 21~ 37 WO93/01918 PCT/~S~2/0~6-integrally formed with a plurality of blade supports 21 sep~rated by corrugations 23 and ha~ing holes 25 adapted to receive locking pins of cap me~ber 4~. The guard bar segments 70 are individually suppQrted by~blade supports 21 via connectors 27, with the exception~of 0nd segments 71 which are integrally formed with the sidewalls of blade seat 20 and attachment members 30.
Greater skin flow control is provided to the segmented guard~bar by this embodiment o~ th~ ~resent in~ention by providing at least one of the guard bar segm~nts 70 with a tapered portion 71 and by reducing the space between adjac~nt s~gments 70. The tapered portion : in the illustrated embodiment is advantageously form~d to provide a smaller space between the rearward portion of : th~ guard bar segments than the respectiYe forward ;: ~ port:ian ~ According to th~ illustrated embodimen~, each segm~nt 70: is preferably tapered bo~h laterally and ~ r arw~rdly thereby providing a s~ooth transition between : 20 :; th~ forward and:rearward portions~c~ ~djacent guard bar seg~ents. While khe angle o~ the~ tapers ~ay ~ary without~departing~from the seope~of the present invention, suitable~angles include absut 3 to~l5~degrees.
25~ : As sh~wn ~in the illustrated~mbodi~entO ~he s~egm~nts are pref~rably provided with a n3n-taperéd, substanti~lly verti~al portion 75. ~his portion is preferably disposed in~the upper, raarward portion o~ the se~ment ~0 and has a sp~ce of su~iciently n rrow width to substantially 30 ~ @liminate the ~nobstructed flow of skin therethrough~ For exa~ple, the:distance between the non-tap~ered p~artion 75 : of adjace~t guard bar segments 70 may be about .003 - .015 in~hes, most:preferably about 0~005 inches.
: :~ : :: :
, , .
According to the embodimant of the present invention : illu5trated in Figures 1 5, each guar~ bar segMent 70 is al80 provided with an i~clined gurface 76 extending from , . ~
~ 21 ~ 2~7 WO 93/01~1~ PCI'/US92/O~S- ~
th~ :Eorward face to the upper surfac:e of the guard bar segmenk~ nclined surface 76 ~ s desigr~ed ~o provide a smoother ~eel to the shaver when the razor head is disposed at an angle to the skin surface., ~ ~
Figure 6 illustxate~ two guard bar segments 170 of an alternative em~odiment of the present invention, In the matter illustrated, the sidewalls 171 are disposed at an ngl~ to the direction of shaving which is illustrat~d by arrow A in F~gur~ 6. From the illustratio~ and the dç~s~:ription herein, those skil led in the art will apprec:iate that an area ~eing shaved will not ba permitted t~ flow unobstructed through the spac~ between adja~:ent segments 170 in light of th~ angle of sidewalls 171 relative to ~he dire~:t:ion of shavinç~ ile this em~o iment of ~:he~ pre~ent invention has r~latively planar id~walls, the sidewalls ~ay be designed such tha~ the space is not o~ly tli~posed at an angl~ to the direction of the having strok~2l: but o that th~ ~3pac:e hl80 tapers rearwardly to pro~ide a narrower space at the rearward po~ion of the segments then a~ the respective orward :
port~orls.
Figure ~t illustrates a still urther embodiment of 25~ the~ present imerl ion wh~rQin adjacent guard bar segme~ts 270 ar~ pro~ ed w~ }ateral extensions ~72. ~Q laterz~l exten~;io~s 272 ~of this e~bodi~ent of the pre;ent invention are de!sig~ed to overlap, preferably without contactirlg each other, within the spaces betwe~n adjac:en'c guard bar : 30 se~me~ts 2700 Lat~ral extensions 272 are desig~ed ts:~
p~e~ent the unohstructed flc~w o~ skin through the space etwe~n adj;~cent guard bar segments ~70.
: ;: Figure 8 illustrates a stili further embodilaent o~
: .
35 the pres~nt invention wherein adjacent guard bar sQg~ents .: : 370 are provided with later~i ex1:ension 372 which are , arranged in side-by-side relationship ~hereby :' ~,,,''t ,,,'3~7 W~3/01~8 -PCT/US92/0~6-signiflcantly reducing the effective space between adjacent guard bar segments 370 to reduce the flow of skin therethrough. The space between lateral extensions 372 of adjacent guard bar segments may b~ about ~003 -..015 inches, most preferably about 0.005 inches.
Lateral extensions, such as those illustrated in Figures 7 and 8, may also ~e utilized in combination with one or more of the embodiments described above on a single guard bar.
The present invention-provides-increased skin flow-co~trol in areas being sh~ved b~tw~en the guard bar segments without reducing the relatively free movement between guard bar segments since the segments are preferably not directly connected.
.
; ~ While the Figures show preferred embodiments o~ the pres-nt i~ntion, alternative e~bodim~ts may be ~ad~
without:departing from the s:cope of the presen~ invention.
Fo~ example, in order to practice the present invention it :
::~ is not necessa:ry:th~t all of the se ~ ~nts are tapered. It may be des~rable to pro~ide tapers:to only one or seve~al : ; o~ the guard bar segments.
:
: ~
: ~ , .
~ ; ~ 30 ~ :
::: ~
,~:
:35 :
:
.
The present invention is directed to a guard bar for a afety razor and, mor~ particularly, to a guard ~ar comprising a plurality of separate s~gm~nts at least one of which is designed to minimize the flo~ of skin through the space~ betwPen the segm~nts.
In recognition of the fact that ~urface~ being shaved ar~ not perfectly planar, a razor head comprising a cap, two blades s~parated by a spacer~ and a guard bar have been designed such that the entire razor head fl xes as a unit during shavîng. In order to maximize the fle~ibility of the blade ~eat, one design includes a guard ~r ormed of a plurality of discrete segments. Thes~
segm~nts are independently supported by the blade seat.
Adjacent se~ments of:the guard bar are thus separated by . spaces, This seqm~n~ed guard bar d~sign has prove~ very : ~uc¢ess~ul i~providing overall ~lexibility to the razor : h~ad without noticeable distortions to the blade geome~ry 20 : ~uri~g shavi~5- ~
~; The ~on~is~ent achieve~ent of a rlose, .
c~o~ortable sha~e~depends upon careful control of th~
blade geomet~y. To this end, the:pre~ent inv~ntion i5 directed to furth~r i~pro~emen~s in r~zor heads utili~ng eg~ented ~uard bars.
Those:skilled i~ the art appreciate that a guard bar, which is designed to be the fir~t ~lement of a safety razor to contact 'a given area during a shaving stroke, affects the manner in which the skin approaches the edg~
o~ the at blade. During a shaving stroke, skin typically flows over a guard bar and into th~ spare ; betw~en the ~uard bar and seat bla~e some distance below a tangent drawn from the top of the gu~rd b~r to khe blade e~ge~ The degree to which s~in may flow below such a ; : tangent linP depends upon the seat blade span, i.e. the distance between the guard bar and sea~ blade edge.
.
WO 93/~1918 ~ US92tO~46~
Though the spaces between segments of a segmented guard bar have been designed to minimize the amount of skin which is not actually contacted by the guard bar segments during a shaving stroke ~, varia~tioals in the skin flow may still result. The skin ~lowing through the spaces between the segments may contact the se~t ~lade edge at a different angle than the skin flowing over the guard bar segments. Additionally, when a ~lexible razor he~d having a segmented guard bar flexes in response to force~ encountered during shaving, the space between at least some o~ the segme~lts increases. This space irlcrease further increases l:he possibility of a non ~ unifor~ skin fl~w i~ediately forward of the ~orward hlade. A non-uni~orm skin fls~w ~ay advsrsely affect the com~ort of the shave.
It would therefore be desirable to pro~ide greater ~;kin f low con~rol te~ a ~egment:ed ~uard bar to ~urther ~inimize~and pref~ra~ly eli3~in~te po~ential : ~ 20 varlation~ in ~kin flow over a segmerlted guard bar and thereby proYide; :b~er con~rol of the blade geometr3r during sh~ving.
he p~esent i~v~nt:ion is directed to a s~g~ent~d guard bar with lmproved skin flow co~trolO Ace:ordinq to on~ illustrated embodiment, the space b~tween tl~e re2lr~ard portion of ~dj aeent segm~n~s i le~;s than the space b~tween th~ forw2rd po~ions o~ those segm~nt~.. Acc:ording to a second illustr~ted es~odimen~, the space be~een :: guard bar ses~ents is disposed at an angle t5:~ the dîrection o~ shaving th~reby preventing the uno~structed iElow of skin thro~lgh the space as the s3cin approached the 3~ ~orward blade. 5till further e~bodi~ents Q~ th~ present in~ntion irlclude }ateral extension positioned on the ; ~ sidewalls o~ guard bar segments in order to mir~imi~e or W093/01918 PCT/~IS92/0~6-block the flow of skin through the spaces Though not limited to any specific typ~ of razor, th~ present invention is particularly suited for use with a flexible razor hsad having a cap member, at least one and preferably two blades separated by a spacer, a blade seat having a plurality ~f blade ~upport portions separated by corrugations, and a segmented guard bar wlth each segment independently connected to the blade support portions.
rie~ Des~ription o~ The Drawin~
Figure 1 is a perspective view of a razor head of one embodiment of the pr~sent in~ention.
.
~igure 2 is a top view of the razor head illustrated in Figure 1.
Figure 3 is a front view of the razor head ~ lustrated in Figure 1.
:~ ~ 20 ~ :
Figur~ 4 is a bottom view of the razor head illustrated in Figure 1.
Figure ~ is an enlarged per~pec~ive view of a portion 25~ Of a blade support and ~ ard~bar of:t~e embodi~ent o8 ~the present invention illustrated in Figure 1.
~`~ Figure 6 is an enlar~ed perspeeti~ view o~ a portion ~: of a ~l~de support and guard bariof a second embodi~n~ o~
the pr~sent invention.
: Figure 7 i~ an enlarged perspective view o~ a por~ion of a blade ~uppor~ and guard ~ar of a third embodimen~ of : the pre ent lnvention.
:: ~
~:
: ~ .
WO 93f01918 PC~ Sg2/~
Figure 8 ~ s an enlarged perspective vi~3w o* a portion of a blade support and guard bar segmenlts o~ a fourth e~nbodi~ent o~E the presç~nt. imrention.
, D0tail~d_D~e~tlo~3 For purposes of illustration, the pre~ent inventior has beeTa illustrated and will be de~;~ribed herein in conjunction ~ith a ~lexible razor head. As used herain, thts ~erm ~Iraæor h~ad" iq m~ant to include both razor ¢ rtridg~s adaptQd to be utilized with a separate handl~, and the upp~r, operative elements of a disposable razor to which a hand}e is permanently a~tached. For ease o eacplanation, the present invention is described herein as ~: 15 ~ disposabl~ cdrtridg~ adapted or attac:hment to a separate razor. ~: ~
Fig~re 1 illu~tra~es a ~razor head o~ one em~odiment o~ the pre~n1:~ in~r~n~ion havi~g a blade ~eat 20t attac}~aer~ aembers 30,~ a cap member ~0, a cap blads 50 having sharpe~ed~ edge: 51, :a seat ~lade 60 ha~ring sharpened eds~ $1,: and~a~ ard bar Gomprising a plurali~y of ents 73.~ ~ q~e~ mann~r of corme~:tis~g the variou~
le~ents ~ay'be::with;t~e use of pins aæ disc:losed in l~.S.
25 ~ Pate~: ~O.~`4~,8~54,041 ;~o Chen, whic:h ie h~reby incorpor~ted by rsfQrenc:e. ~ Other m~t:hods ar6! a}so ~suitable withs~ut dep~rting fx~ the scope o~ th~ pr~sent irlven~ion. For eYd~ple, th~ cap; 40, blade support 20, b~ade spacer 35, a~d ~gmented, guard bar~m~y also be inteç~r.lly ~onned 30 around one or more blades ~y an inse~c moldislg proc~ss.
~ - ~
. : ~ : : :
The preserlt invention provides great~r skin flo~
c:orl'crc~l tAan pr~iously disclosed seg~ent~d guard bars by increasing the control of skin through the sp ce between 3~ ad~e~nt ~e~ents. The skin flow con~rol ~nembe~rs o~ one illu~:trated embodiment are best understood with re~ere~ce to Figures 1-5. As illustrated, blade seat 20 is 21~ 37 WO93/01918 PCT/~S~2/0~6-integrally formed with a plurality of blade supports 21 sep~rated by corrugations 23 and ha~ing holes 25 adapted to receive locking pins of cap me~ber 4~. The guard bar segments 70 are individually suppQrted by~blade supports 21 via connectors 27, with the exception~of 0nd segments 71 which are integrally formed with the sidewalls of blade seat 20 and attachment members 30.
Greater skin flow control is provided to the segmented guard~bar by this embodiment o~ th~ ~resent in~ention by providing at least one of the guard bar segm~nts 70 with a tapered portion 71 and by reducing the space between adjac~nt s~gments 70. The tapered portion : in the illustrated embodiment is advantageously form~d to provide a smaller space between the rearward portion of : th~ guard bar segments than the respectiYe forward ;: ~ port:ian ~ According to th~ illustrated embodimen~, each segm~nt 70: is preferably tapered bo~h laterally and ~ r arw~rdly thereby providing a s~ooth transition between : 20 :; th~ forward and:rearward portions~c~ ~djacent guard bar seg~ents. While khe angle o~ the~ tapers ~ay ~ary without~departing~from the seope~of the present invention, suitable~angles include absut 3 to~l5~degrees.
25~ : As sh~wn ~in the illustrated~mbodi~entO ~he s~egm~nts are pref~rably provided with a n3n-taperéd, substanti~lly verti~al portion 75. ~his portion is preferably disposed in~the upper, raarward portion o~ the se~ment ~0 and has a sp~ce of su~iciently n rrow width to substantially 30 ~ @liminate the ~nobstructed flow of skin therethrough~ For exa~ple, the:distance between the non-tap~ered p~artion 75 : of adjace~t guard bar segments 70 may be about .003 - .015 in~hes, most:preferably about 0~005 inches.
: :~ : :: :
, , .
According to the embodimant of the present invention : illu5trated in Figures 1 5, each guar~ bar segMent 70 is al80 provided with an i~clined gurface 76 extending from , . ~
~ 21 ~ 2~7 WO 93/01~1~ PCI'/US92/O~S- ~
th~ :Eorward face to the upper surfac:e of the guard bar segmenk~ nclined surface 76 ~ s desigr~ed ~o provide a smoother ~eel to the shaver when the razor head is disposed at an angle to the skin surface., ~ ~
Figure 6 illustxate~ two guard bar segments 170 of an alternative em~odiment of the present invention, In the matter illustrated, the sidewalls 171 are disposed at an ngl~ to the direction of shaving which is illustrat~d by arrow A in F~gur~ 6. From the illustratio~ and the dç~s~:ription herein, those skil led in the art will apprec:iate that an area ~eing shaved will not ba permitted t~ flow unobstructed through the spac~ between adja~:ent segments 170 in light of th~ angle of sidewalls 171 relative to ~he dire~:t:ion of shavinç~ ile this em~o iment of ~:he~ pre~ent invention has r~latively planar id~walls, the sidewalls ~ay be designed such tha~ the space is not o~ly tli~posed at an angl~ to the direction of the having strok~2l: but o that th~ ~3pac:e hl80 tapers rearwardly to pro~ide a narrower space at the rearward po~ion of the segments then a~ the respective orward :
port~orls.
Figure ~t illustrates a still urther embodiment of 25~ the~ present imerl ion wh~rQin adjacent guard bar segme~ts 270 ar~ pro~ ed w~ }ateral extensions ~72. ~Q laterz~l exten~;io~s 272 ~of this e~bodi~ent of the pre;ent invention are de!sig~ed to overlap, preferably without contactirlg each other, within the spaces betwe~n adjac:en'c guard bar : 30 se~me~ts 2700 Lat~ral extensions 272 are desig~ed ts:~
p~e~ent the unohstructed flc~w o~ skin through the space etwe~n adj;~cent guard bar segments ~70.
: ;: Figure 8 illustrates a stili further embodilaent o~
: .
35 the pres~nt invention wherein adjacent guard bar sQg~ents .: : 370 are provided with later~i ex1:ension 372 which are , arranged in side-by-side relationship ~hereby :' ~,,,''t ,,,'3~7 W~3/01~8 -PCT/US92/0~6-signiflcantly reducing the effective space between adjacent guard bar segments 370 to reduce the flow of skin therethrough. The space between lateral extensions 372 of adjacent guard bar segments may b~ about ~003 -..015 inches, most preferably about 0.005 inches.
Lateral extensions, such as those illustrated in Figures 7 and 8, may also ~e utilized in combination with one or more of the embodiments described above on a single guard bar.
The present invention-provides-increased skin flow-co~trol in areas being sh~ved b~tw~en the guard bar segments without reducing the relatively free movement between guard bar segments since the segments are preferably not directly connected.
.
; ~ While the Figures show preferred embodiments o~ the pres-nt i~ntion, alternative e~bodim~ts may be ~ad~
without:departing from the s:cope of the presen~ invention.
Fo~ example, in order to practice the present invention it :
::~ is not necessa:ry:th~t all of the se ~ ~nts are tapered. It may be des~rable to pro~ide tapers:to only one or seve~al : ; o~ the guard bar segments.
:
: ~
: ~ , .
~ ; ~ 30 ~ :
::: ~
,~:
:35 :
:
.
Claims (32)
WHAT IS CLAIMED IS:
1. A guard bar for use with a razor head comprising:
a plurality of segments disposed for engagement with a surface being shaved, said segments comprising a face engaging portion and a rearward portion, said segments being at least partially separatd from adjacent segments thereby providing a space therebetween; and at least one of said segments comprising a tapered side portion for controlling the flow of skin through said space between said segments.
a plurality of segments disposed for engagement with a surface being shaved, said segments comprising a face engaging portion and a rearward portion, said segments being at least partially separatd from adjacent segments thereby providing a space therebetween; and at least one of said segments comprising a tapered side portion for controlling the flow of skin through said space between said segments.
2. A guard bar according to claim 1 wherein said tapered side portion further comprises a substantially vertical portion.
3. A guard bar according to claim 2 wherein said substantially vertical portion is disposed at the top of said segment.
4. A guard bar according to claim 3 wherein at least one pair of adjacent guard bar segments comprise opposed tapered side portions.
5. A guard bar according to claim 4 wherein said tapered side portions comprise vertical portions having a reduced space therebetween.
6. A guard bar according to claim 1 wherein at least one pair of adjacent guard bar segments comprise opposed tapered side portions.
7. A guard bar according to claim 6 wherein said tapered side portions comprise vertical portions having a reduced space therebetween.
WO 93/01918 PCT/US92/0546?
WO 93/01918 PCT/US92/0546?
8. A guard bar according to claim 7 wherein said reduced space is about .003 - .015 inches.
9. A guard bar according to claim 5 wherein said reduced space is about .003 - .015 inches.
10. A guard bar according to claim 9 wherein said reduced space is about .005 inches.
11. A guard bar according to claim 8 wherein said reduced space is about .005 inches.
12. A guard bar according to claim 2 wherein said tapered side portion tapers rearwardly and laterally.
13. A guard bar according to claim 1 wherein said tapered side portion tapers rearwardly and laterally.
14. A razor head comprising:
at least one blade having a sharpened edge;
a blade seat for supporting said blade;
a guard member comprising a plurality of segments disposed forwardly of said sharpened edge for controlling the flow of skin through at least one space between said segment, at least one of said segments comprising a tapered side portion for controlling the flow of skin through said space between said segments.
at least one blade having a sharpened edge;
a blade seat for supporting said blade;
a guard member comprising a plurality of segments disposed forwardly of said sharpened edge for controlling the flow of skin through at least one space between said segment, at least one of said segments comprising a tapered side portion for controlling the flow of skin through said space between said segments.
15. A guard bar according to claim 14 wherein said segment comprising a tapered side portion further comprises a substantially vertical portion.
16. A guard bar according to claim 15 wherein said substantially vertical portion is disposed at the top of said segment.
WO 93/01918 PCT/US92/0546?
WO 93/01918 PCT/US92/0546?
17. A guard bar according to claim 14 wherein at least one pair of adjacent guard bar segments comprise opposed tapered side portions.
18. A guard bar according to claim 17 wherein said tapered side portions comprise vertical portions having a reduced space therebetween.
lg. A guard bar according to claim 18 wherein said reduced space is about .003 - .015 inches.
20. A guard bar according to claim 18 wherein said reduced space is about .005 inches.
21. A guard bar according to claim 18 wherein said tapered side protion tapers rearwardly and laterally.
22. A guard bar according to claim 14 wherein said tapered side portion tapers rearwardly and laterally.
23. A guard bar according to claim 14 wherein said guard bar is of flexible.
24. A guard bar for use with a razor head whereby said razor head is moved along a shaving path on a surface being shaved, said guard bar comprising:
a plurality of segments disposed for engagement with a surface being shaved; and at least two of said segments having a space therebetween defined by opposing sidwalls of said segments, said sidewalls disposed at an angle to said shaving path.
a plurality of segments disposed for engagement with a surface being shaved; and at least two of said segments having a space therebetween defined by opposing sidwalls of said segments, said sidewalls disposed at an angle to said shaving path.
25. A guard bar according to claim 24 wherein adjacent segments are not in direct contact.
WO 93/01918 PCT/US92/0546?
WO 93/01918 PCT/US92/0546?
26. A guard bar according to claim 24 wherein said guard bar is integrally formed with a blade support.
27. A guard bar according to claim 24 wherein said guard bar is flexible.
28. A guard bar for use with a razor head comprising:
a plurality of segments disposed for engagement with a surface being shaved, said segments comprising a face engaging portion and a rearward portion, said segments being at least partially separated from adjacent segments thereby providing a space therebetween; and at least one of said segments comprising a lateral extension which extends into said space thereby providing an obstruction to the flow of skin therethrough.
a plurality of segments disposed for engagement with a surface being shaved, said segments comprising a face engaging portion and a rearward portion, said segments being at least partially separated from adjacent segments thereby providing a space therebetween; and at least one of said segments comprising a lateral extension which extends into said space thereby providing an obstruction to the flow of skin therethrough.
29. A guard bar according to claim 28 wherein at least two adjacent guard bar segments comprise lateral extensions disposed in side-by-side relation.
30. A guard bar according to claim 29 wherein said lateral extensions have a space of about .003 - .015 inches therebetween.
31. A guard bar according to claim 29 wherein said lateral extensions having a space of about .005 inch therebetween.
32. A guard bar according to claim 28 wherein at least two adjacent guard bar segments comprise lateral extensions disposed in overlapping relation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002426578A CA2426578A1 (en) | 1991-07-18 | 1992-06-29 | Segmented guard bar |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US73229491A | 1991-07-18 | 1991-07-18 | |
| US732,294 | 1991-07-18 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002426578A Division CA2426578A1 (en) | 1991-07-18 | 1992-06-29 | Segmented guard bar |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2112887A1 true CA2112887A1 (en) | 1993-02-04 |
Family
ID=24942974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002112887A Abandoned CA2112887A1 (en) | 1991-07-18 | 1992-06-29 | Segmented guard bar |
Country Status (17)
| Country | Link |
|---|---|
| US (1) | US5475923A (en) |
| EP (1) | EP0594695B1 (en) |
| JP (1) | JP3193047B2 (en) |
| CN (1) | CN1034639C (en) |
| AT (1) | ATE144454T1 (en) |
| AU (1) | AU661707B2 (en) |
| BR (1) | BR9206284A (en) |
| CA (1) | CA2112887A1 (en) |
| DE (1) | DE69214819T2 (en) |
| ES (1) | ES2094361T3 (en) |
| FI (1) | FI940210A0 (en) |
| IL (1) | IL102537A (en) |
| MX (1) | MX9203869A (en) |
| NO (1) | NO940166D0 (en) |
| PT (1) | PT100696A (en) |
| WO (1) | WO1993001918A1 (en) |
| ZA (1) | ZA925389B (en) |
Families Citing this family (29)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1034639C (en) | 1991-07-18 | 1997-04-23 | 沃纳-兰伯特公司 | Segmented guard bar |
| GB9407896D0 (en) * | 1994-04-21 | 1994-06-15 | Gillette Co | Safety razors |
| US5953819A (en) * | 1995-02-06 | 1999-09-21 | The Gillette Company | Razors |
| US5689883A (en) * | 1995-05-08 | 1997-11-25 | Warner-Lambert Company | Shaving implement |
| US6243951B1 (en) | 1997-02-18 | 2001-06-12 | The Gillette Company | Safety razors |
| US6182366B1 (en) | 1999-04-21 | 2001-02-06 | Warner-Lambert Company | Flexible razor assembly and cartridge |
| US6772523B1 (en) | 1999-04-21 | 2004-08-10 | Eveready Battery Company, Inc. | Pivotable and flexible razor assembly and cartridge |
| US6839968B2 (en) * | 2002-05-09 | 2005-01-11 | The Gillette Company | Shaving systems |
| US6852262B2 (en) * | 2002-05-09 | 2005-02-08 | The Gillette Company | Insert molding razor cartridges |
| US7111401B2 (en) * | 2003-02-04 | 2006-09-26 | Eveready Battery Company, Inc. | Razor head having skin controlling means |
| US7745509B2 (en) | 2003-12-05 | 2010-06-29 | 3M Innovative Properties Company | Polymer compositions with bioactive agent, medical articles, and methods |
| GB2416508A (en) * | 2004-07-23 | 2006-02-01 | Gillette Man Inc | Sharp undercutter and undercutter fabrication |
| US20070166399A1 (en) | 2006-01-13 | 2007-07-19 | 3M Innovative Properties Company | Silver-containing antimicrobial articles and methods of manufacture |
| US9221185B2 (en) | 2008-09-10 | 2015-12-29 | The Gillette Company | Shaving razors and cartridges |
| WO2010036920A1 (en) * | 2008-09-25 | 2010-04-01 | American Safety Razor Company | Trimmer for shaving razor |
| US8209867B2 (en) * | 2008-10-02 | 2012-07-03 | The Gillette Company | Shaving razors and cartridges |
| US8782903B2 (en) * | 2009-05-29 | 2014-07-22 | The Gillette Company | Shaving razor comb guard for a trimming blade |
| US8209869B2 (en) * | 2009-11-09 | 2012-07-03 | The Gillette Company | Cantilever comb guard |
| US8726518B2 (en) * | 2010-03-16 | 2014-05-20 | The Gillette Company | Shaving razors and cartridges |
| US8413334B2 (en) * | 2010-08-03 | 2013-04-09 | The Gillette Company | Shaving cartridge guard for supporting skin |
| US8448339B2 (en) * | 2010-08-03 | 2013-05-28 | The Gillette Company | Shaving cartridge with supressed blade geometry |
| US9492933B2 (en) | 2011-09-30 | 2016-11-15 | The Gillette Company | Guard for a shaving razor |
| USD665948S1 (en) | 2012-01-10 | 2012-08-21 | The Gillette Company | Hair removal cartridge |
| EP3231565B1 (en) * | 2016-03-31 | 2019-09-18 | The Gillette Company LLC | Razor cartridge with fluid management |
| USD834251S1 (en) | 2016-09-30 | 2018-11-20 | Emile J. Spalitta | Razor blade cartridge |
| US11345055B2 (en) * | 2018-09-05 | 2022-05-31 | The Gillette Company Llc | Razor cartridge structure |
| US11298842B2 (en) | 2018-09-05 | 2022-04-12 | The Gillette Company Llc | Razor structure |
| USD933295S1 (en) | 2019-07-15 | 2021-10-12 | The Gillette Company Llc | Shaving razor cartridge |
| US11446835B2 (en) | 2019-07-15 | 2022-09-20 | The Gillette Company Llc | Shaving razor cartridge |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US954871A (en) * | 1908-09-05 | 1910-04-12 | Joseph Molkenthin Jr | Safety-razor. |
| US1247266A (en) * | 1916-02-24 | 1917-11-20 | Harry B Hartman | Safety-razor. |
| GB302557A (en) * | 1928-06-23 | 1928-12-20 | William Edwin Bleloch | Improvements in or relating to safety razors |
| US1927971A (en) * | 1932-11-09 | 1933-09-26 | Edward J Youmans | Razor |
| US2750663A (en) * | 1951-08-09 | 1956-06-19 | Leon M Coles | Hair trimmer |
| US2766521A (en) * | 1952-08-28 | 1956-10-16 | Benvenuti Giulio | Razor with skin stretching means |
| US4409735A (en) * | 1976-08-18 | 1983-10-18 | Warner-Lambert Company | Safety razor |
| US4069580A (en) * | 1976-08-18 | 1978-01-24 | Warner-Lambert Company | Safety razor with flexible blade cartridge |
| US4443939A (en) * | 1982-04-30 | 1984-04-24 | Warner-Lambert Company | Flexible razor blade cartridge |
| US4516320A (en) * | 1983-04-28 | 1985-05-14 | Warner-Lambert Company | Dynamic razor |
| US4754548A (en) * | 1985-09-09 | 1988-07-05 | Solow Terry S | Flexible, sectionalized contour razor |
| US4720917A (en) * | 1985-09-13 | 1988-01-26 | Solow Terry S | Flexible blade contour razor |
| GB8717216D0 (en) * | 1987-07-21 | 1987-08-26 | Gillette Co | Safety razors |
| US4854043A (en) * | 1987-10-30 | 1989-08-08 | Warner-Lambert Company | Flexible razor head |
| US5003694A (en) * | 1987-10-30 | 1991-04-02 | Warner-Lambert Company | Flexible razor head |
| US4976028A (en) * | 1987-10-30 | 1990-12-11 | Warner-Lambert Company | Flexible razor head |
| CN1034639C (en) | 1991-07-18 | 1997-04-23 | 沃纳-兰伯特公司 | Segmented guard bar |
-
1992
- 1992-06-27 CN CN92105299A patent/CN1034639C/en not_active Expired - Fee Related
- 1992-06-29 CA CA002112887A patent/CA2112887A1/en not_active Abandoned
- 1992-06-29 AT AT92914939T patent/ATE144454T1/en not_active IP Right Cessation
- 1992-06-29 EP EP92914939A patent/EP0594695B1/en not_active Expired - Lifetime
- 1992-06-29 BR BR9206284A patent/BR9206284A/en not_active Application Discontinuation
- 1992-06-29 DE DE69214819T patent/DE69214819T2/en not_active Expired - Lifetime
- 1992-06-29 AU AU22975/92A patent/AU661707B2/en not_active Ceased
- 1992-06-29 ES ES92914939T patent/ES2094361T3/en not_active Expired - Lifetime
- 1992-06-29 JP JP50281393A patent/JP3193047B2/en not_active Expired - Lifetime
- 1992-06-29 WO PCT/US1992/005467 patent/WO1993001918A1/en active IP Right Grant
- 1992-07-01 MX MX9203869A patent/MX9203869A/en not_active IP Right Cessation
- 1992-07-16 PT PT100696A patent/PT100696A/en not_active Application Discontinuation
- 1992-07-17 ZA ZA925389A patent/ZA925389B/en unknown
- 1992-07-17 IL IL10253792A patent/IL102537A/en not_active IP Right Cessation
- 1992-10-07 US US07/957,490 patent/US5475923A/en not_active Expired - Lifetime
-
1994
- 1994-01-14 FI FI940210A patent/FI940210A0/en not_active Application Discontinuation
- 1994-01-17 NO NO940166A patent/NO940166D0/en unknown
Also Published As
| Publication number | Publication date |
|---|---|
| IL102537A (en) | 1995-01-24 |
| ATE144454T1 (en) | 1996-11-15 |
| AU661707B2 (en) | 1995-08-03 |
| BR9206284A (en) | 1994-08-02 |
| EP0594695A1 (en) | 1994-05-04 |
| NO940166L (en) | 1994-01-17 |
| PT100696A (en) | 1994-04-29 |
| DE69214819D1 (en) | 1996-11-28 |
| EP0594695B1 (en) | 1996-10-23 |
| NO940166D0 (en) | 1994-01-17 |
| ES2094361T3 (en) | 1997-01-16 |
| JPH06511405A (en) | 1994-12-22 |
| CN1068533A (en) | 1993-02-03 |
| MX9203869A (en) | 1993-01-01 |
| US5475923A (en) | 1995-12-19 |
| CN1034639C (en) | 1997-04-23 |
| FI940210A (en) | 1994-01-14 |
| WO1993001918A1 (en) | 1993-02-04 |
| DE69214819T2 (en) | 1997-05-07 |
| ZA925389B (en) | 1992-08-20 |
| FI940210A0 (en) | 1994-01-14 |
| JP3193047B2 (en) | 2001-07-30 |
| AU2297592A (en) | 1993-02-23 |
| IL102537A0 (en) | 1993-01-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |