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Numéro de publicationUS2512237 A
Type de publicationOctroi
Date de publication20 juin 1950
Date de dépôt12 mars 1948
Date de priorité12 mars 1948
Numéro de publicationUS 2512237 A, US 2512237A, US-A-2512237, US2512237 A, US2512237A
InventeursMravik Edward E
Cessionnaire d'origineMravik Edward E
Exporter la citationBiBTeX, EndNote, RefMan
Liens externes: USPTO, Cession USPTO, Espacenet
Pocket implement
US 2512237 A
Images(1)
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Description  (Le texte OCR peut contenir des erreurs.)

E. E. MRAVIK POCKET IMPLEMENT June 20, '1950.

Filed March 12, 1948 IN VEN TOR.

ran 4R0 5. MFA w/r ATTORNEY-5' Patented June 20, 1950 UNITED STATES PATENT OFFICE 2 Claims.

This" invention relates to an implementsuch as a nail-file or knife or-other device which it is convenient and useful to carry in the pocket or handbag.

An object of the invention is to provide a device of this kind comprising a casing and sheath whereby the implement may be covered when not in use, andinstantly unsheathed for use.

Another object of the invention is toprovide a pocketimplement in which the essential element or instrument is immovable relative to the casing and therefore firmly positioned for efficient use.

Another object is to provide such a pocket implement in which the sheath is movable inwardly and outwardly of its casing.

Another object is the provision of such a device in which the implement may be readily removed and replaced.

A further object is to provide a pocket imple ment adapted for efiicient low-cost manufacture.

These and other objects are attained by the means described herein and illustrated in the accompanying drawings, in which:

Figure l is a side view of the pocket implement in operative condition, part of the casing being broken away for the purpose of disclosing structure.

Figure 2 is a longitudinal cross-sectional view of the device in sheathed condition.

Figure 3 is a View similar to Figure l with the device given a quarter turn, part of the sheath being broken away.

Figure 4 is a detail view of the implement proper in the form of a nail-file, and the rod connected therewith.

Figure 5 is a cross-sectional view on line 5-5 of Figure 2.

Figure 6 is a lower end view of the device.

Figure '7 is a view similar to Figure 4 with the implement member in the form of a blade.

In greater detail and with reference to the drawings, my pocket implement comprises a tubular casing I preferably provided with a reduced threaded end ll upon which a cap 12 is positioned. A pocket clip [3 may be held in place on said end by the cap.

An implement member, such as a nail-file I4 is supported by the casing and has connected with the upper end thereof a rod positioned in the casing and having an opening I 6 adjacent its free end. A pair of shoulders I! is provided by the upper end of the file.

A catch element It! is slidably disposed on rod iii in the casing and comprises a tapered upper end l9 having oppositely-disposed grooves 20 formed thereonand an annular channel .2! adjacent said end, in communication with said grooves.

An expansion spring 22 is positioned on the rod l5 in the casing. Embracing the lower end of the catch element I8 is a sheath 23 normally enclosing the file I4 and having an annular enlarged upper end 24 slidably disposed in casing I0 and embracing the lower end of catch element I8 being fixedly connected therewith by means of pins 25 and 25.

The rod [5 at its upper end projects beyond the end ii of the casing and is so held by a pin 21 inserted through the opening l6 and resting against the extremity of end H. The spring 22 is thereby somewhat compressed between the tapered end [9 of catch element [8, and the upper end of casing Ill. Thus the lower end of the catch element is yieldably retained against shoulders I! of the file l4, and the sheath 23 in its extended position covering the file.

When it is desired to use the latter, the sheath is pushed into the casing, causing similar inward movement of the catch element [8. An annular catch 28 secured interiorly of the casing comprises a pair of detents 29. The grooves 20 in the tapered end [9 of catch element l8 permit movement of said end past the detent (see Figure 5). The detents are received in the annular channel 2| and retained therein by turning of the catch element for disaligning the grooves 20 with the detents. After use of the file M, the detents and grooves are again aligned and the spring 22 actuates the catch element [8 and the attached sheath downwardly, the sheath again enclosing the file.

In Figure 7 the implement member depicted is a blade 30. The associated rod and all other parts of the pocket device are otherwise the same as already described. It is obvious that other implements may be substituted for the file. The substitution is readily accomplished by removal of the cap l2, and pin 21, at which time the rod I5 and its connected and associated parts may be withdrawn from the casing.

The device is conveniently attached to a pocket by the clip Hi.

What is claimed is:

1. In a pocket implement comprising a tubular casing, an implement extending from within one end of the casing, a retractible sheath normally extending from within the same one end of said casing about the implement, and a spring within said casing resiliently urging the sheath outwardly into its extended position about said implement, the improvements which include rear shoulders forming an abutment on the inner end of said implement, a rod of smaller cross section than that of the implement secured at one end to the inner end of the latter and at the other end held at the other end of said casing against axial movement, a catch member slidably mounted on the rod within the abutment on the inner end of said implement and being connected at the outer end thereof with the inner end of the sheath, the catch member having an annular channel intermediate the ends thereof and a pair of diametrically-opposite, longitudinallydisposed grooves upon the inner end communicating with the annular channel, a rod extending through the spring and the latter extending from the inner end of said catch member to said other end of said casing, and a pair of opposite detents directed radially inward from the cylindrical wall of said casing toward each other intermediate the ends of said casing in effective position to pass through the opposite grooves on said catch member and engage in the annular channel thereon during retraction of said catch member and said sheath.

2. In a pocket implement comprising a tubular casing, an implement extending fromwithin one end of the casing, a retractible sheath normally extending from within the same one end of said casing about the implement, and a spring within said casing resiliently urging the sheath outwardly into its extended position about said implement, the improvements which include rear shoulders forming an abutment on the inner end of said implement, a reduced extremity upon the other end of said casing, a cap fixed on the reduced extremity, a rod of smaller cross-section than that of the implement secured at one end thereof to the inner end of said implement and at the other end extending through said reduced extremity of said casing into the cap thereon and within said cap having a transverse aperture, a transverse pin extending through the latter aperture and abutting the end of said reduced extremity to hold the rod immovable axially, a catch member slidably mounted on the rod within the abutment on the inner end of said implement and extending with the outer end ,thereof into the inner end of the sheath and being secured thereto, the catch member having an annular channel intermediate the ends thereof and a pair of diametrically-opposite, longitudinally-disposed grooves upon the inner end communicating with the annular channel, a conical extremity upon said inner end of the catch member, the rod extending through the spring and the latter extending from the conical extremity of said catch member to the other end of said casing within the reduced extremity thereof, an annular catch fixed upon the interior of the casing intermediate the ends thereof, and a :pair of opposite detents fixed in the annular catch and directed radially inward toward each other in effective position to pass through the opposite grooves on said catch member and engage in the annular channel thereon upon retraction of said catch member and said sheath.

EDWARD E. MRAVIK.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,797,016 Osborne Mar. 17, 1931

Citations de brevets
Brevet cité Date de dépôt Date de publication Déposant Titre
US1797016 *9 sept. 192917 mars 1931Osborne Orien VScratch awl
Référencé par
Brevet citant Date de dépôt Date de publication Déposant Titre
US2784489 *10 mars 195412 mars 1957Raymond E ReiseUtility blade holder
US3977077 *2 sept. 197531 août 1976Cbs Inc.Convertible swivel knife
US4192066 *31 mars 197811 mars 1980Tucker Willkie YAnti-rape device
US4414974 *9 juin 198115 nov. 1983General Conveyors LimitedMicrosurgical knife
US4523379 *2 mai 198418 juin 1985TeknaKnife with retractable sheath
US5414933 *30 nov. 199316 mai 1995Garner; Ted V.Cutting device
US6536115 *30 oct. 199825 mars 2003James TabbiAutomatically retractable safety utility knife
US69793409 avr. 200427 déc. 2005Edward BilenskiSingle use, self-contained twist resistant surgical knife
US7024773 *23 mai 200311 avr. 2006Jennings Dale ESafety cutter with retracting guard
US738763721 avr. 200417 juin 2008Becton, Dickinson And CompanySurgical knife safety handle
US790142231 oct. 20078 mars 2011Beaver-Visitec International (Us), Inc.Surgical knife safety handle
US790589431 oct. 200715 mars 2011Beaver-Visitec International (Us), Inc.Surgical knife safety handle
US790984019 oct. 200522 mars 2011Beaver-Visitec International (Us), Inc.Surgical knife safety handle having user operable lock
US825633017 nov. 20094 sept. 2012Alcon Research, Ltd.Guarded surgical knife handle
US825633117 nov. 20094 sept. 2012Alcon Research, Ltd.Guarded surgical knife handle
US84644307 févr. 200818 juin 2013Beaver-Visitec International (Us), Inc.Retractable safety knife
EP0162170A1 *12 déc. 198427 nov. 1985TeknaKnife with retractable sheath
EP0420956A1 *23 mars 199010 avr. 1991Stuart M. DolginSurgical scalpel with retractable blade guard
WO2005099597A2 *8 avr. 200527 oct. 2005Edward BilenskiSingle-use, self-contained twist resistant surgical knife
Classifications
Classification aux États-Unis30/151, 132/76.2
Classification internationaleB26B29/00, A45D29/00, B26B1/00, A45D29/20, B26B1/08, B26B5/00, B26B29/02
Classification coopérativeA45D29/20, B26B29/02, B26B5/00, B26B1/08
Classification européenneB26B1/08, A45D29/20, B26B29/02, B26B5/00