CA1246463A - Earplug device - Google Patents
Earplug deviceInfo
- Publication number
- CA1246463A CA1246463A CA000496374A CA496374A CA1246463A CA 1246463 A CA1246463 A CA 1246463A CA 000496374 A CA000496374 A CA 000496374A CA 496374 A CA496374 A CA 496374A CA 1246463 A CA1246463 A CA 1246463A
- Authority
- CA
- Canada
- Prior art keywords
- headband
- shank portion
- shank
- earplug
- earplug device
- 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.)
- Expired
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
- A61F11/00—Methods or devices for treatment of the ears or hearing sense; Non-electric hearing aids; Methods or devices for enabling ear patients to achieve auditory perception through physiological senses other than hearing sense; Protective devices for the ears, carried on the body or in the hand
- A61F11/06—Protective devices for the ears
- A61F11/08—Protective devices for the ears internal, e.g. earplugs
- A61F11/12—External mounting means
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Biomedical Technology (AREA)
- Acoustics & Sound (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Headphones And Earphones (AREA)
- Helmets And Other Head Coverings (AREA)
- Prostheses (AREA)
Abstract
ABSTRACT
An earplug device includes a headband with earplugs attached to the ends thereof. The earplugs have a head portion and a shank portion, the latter with its rear end joined to the associated headband end. The shank portion has a stiffened middle section and is articulately connected on either side thereof respectively to the head portion and headband end to form a doubly articulated shank configurat-tion. The head portion is thus given the opportunity of coacting in the best possible way with the auditory canal of an ear, and to a substantial degree independently of the attitude of the headband.
An earplug device includes a headband with earplugs attached to the ends thereof. The earplugs have a head portion and a shank portion, the latter with its rear end joined to the associated headband end. The shank portion has a stiffened middle section and is articulately connected on either side thereof respectively to the head portion and headband end to form a doubly articulated shank configurat-tion. The head portion is thus given the opportunity of coacting in the best possible way with the auditory canal of an ear, and to a substantial degree independently of the attitude of the headband.
Description
~2~ 3 EARPLUG DEVICE
Technical Field The present invention relates to an earplug device of the kind including t~ro earplugs and an elastic headband, an earplug being connected to each end of the headband, each earplug including a shank portion with its rear end connected to the headband and its forward end provided with a head portion adapted for coaction with the auditory canal of an ear for the purpose of sealing or closing off the canal.
Back~round Art Earplugs provided with shanks are known in many diffe-rent embodiments. It is often desirable to have such earplugs connected to each other in pairs, e.g. by a string or the like.
An example of this is illustrated in our own U.S. patent number ~,314,553.
It has furthermore been known for a long time to arrange earplugs in pairs on an elastic headband. In such a case as well, the earplugs can include a shank portion, which is con-nected to the headband. An example of this is illustrated in U.S. patent number 3,618,600. Another example is illustrated in U.S. patent number 4,461,290, disclosing an earplug connect-ion involving a ball joint.
However, it has often been found difficult to obtain satisfactory sealing or closing-off of the auditory canal with earplugs carried by a headband.
Object of the Invention The main object of the present invention istherefore to provide an earplug device of the kind mentioned in the intro-duction, with which there are enabled improved sealing and sealing-off effects.
A further object of the invention is to provide an ear-plug device of the kind mentioned, that includes earplugs with a head portion of the general embodiment illustrated in our above-mentioned U.S~ patent number 4,314,553.
Technical Field The present invention relates to an earplug device of the kind including t~ro earplugs and an elastic headband, an earplug being connected to each end of the headband, each earplug including a shank portion with its rear end connected to the headband and its forward end provided with a head portion adapted for coaction with the auditory canal of an ear for the purpose of sealing or closing off the canal.
Back~round Art Earplugs provided with shanks are known in many diffe-rent embodiments. It is often desirable to have such earplugs connected to each other in pairs, e.g. by a string or the like.
An example of this is illustrated in our own U.S. patent number ~,314,553.
It has furthermore been known for a long time to arrange earplugs in pairs on an elastic headband. In such a case as well, the earplugs can include a shank portion, which is con-nected to the headband. An example of this is illustrated in U.S. patent number 3,618,600. Another example is illustrated in U.S. patent number 4,461,290, disclosing an earplug connect-ion involving a ball joint.
However, it has often been found difficult to obtain satisfactory sealing or closing-off of the auditory canal with earplugs carried by a headband.
Object of the Invention The main object of the present invention istherefore to provide an earplug device of the kind mentioned in the intro-duction, with which there are enabled improved sealing and sealing-off effects.
A further object of the invention is to provide an ear-plug device of the kind mentioned, that includes earplugs with a head portion of the general embodiment illustrated in our above-mentioned U.S~ patent number 4,314,553.
2 ~ ~ ~ 6 Summary of Invention The above-mentioned objec-ts are achieved by an earplug device that has the distinguishing features defined in ~he claims.
The inventive earplug device is thus essentially dis-tinguished in that the shank portion of the respective earplug is stiffened and connected both to the head portion and to the headband in a manner such as to provide articulation, thus forming a doubly articulated shank configuration. The term "articulation" is here to be given wide meaning and does not require the arrangement of special articulation means.
The doubly articulated shank configuration in accordance with the invention has been found to result in that the head por~ion of the respective earplug, coacting with the auditory canal, may easily and effectively be caused to assume the best position from the sealing or closing-off aspect by the legs or side portions of the headband being moved somewhat backwards and forwards while a light inward pressure is appli-ed to them. The best position thus obtained wi~l then remain, at least substantially, and essentially independent of unav~d-able small movements of the headband. This effect is not obtained with prior art earplugs carried by a headband.
According to the invention, it is preferred to have at least substantially equal ariculations at the two ends of the shank portion.
The articulation in accordance with the invention is advantageously achieved by the material in the respectSlhv~ end and/or in connecting parts of the device being so elastic in relation to remaining connection material that bending prima-rily takes place here. According to a preferred embodiment,the shank portion may thus include a stiff middle section in association with substantially less stiff end sections, which will consequently be relatively flexible and deflectable~
these sections being connected to the head portion of the earplug and the headband, respectively.
Although the shank portion, which is preferably inte-gral with its associated head portion, could have an integrated, ~ 3 ~ ~2~ 3 22819-531 stiffer middle section, i-t is in accordance with the invention advantageous to let the shank portion include a shaft section of elastic material with a middle portion stiffened by one or more separate stiffening members. The latter may advan-tageously com-prise a stiffer tubular sleeve or the like, surrounding the middle portion of the shaft section, the sleeve thus leaving end portions of the shaft section free to function as articulation elements.
It has been found particularly advantageous to have a tubular shaft section, i.e. one with a central bore. There is thus achieved very good articulation on both sides of the stiffen-ed middle section.
The utilisation of a tubular shaft section also invol-ves that connection to the headband can be accomplished in a very advantageous manner, namely by using a pin or the like, pro-jecting from the headband and into the bore of the shaft section.
The pin suitably enters as far as the vicinity of the zone where the shank portion stiffening starts, so that a well defined articulation zone is obtained. Particularly advantageous is that the diameter of the pin is greater than that of the bore, so that ~0 the headband end portion of the shaft section will be expanded~
articulation then being clearly pronounced just where the expansion begins.
Although the head portion of the respective earplug can be conceived as being implemented in many different ways, depending on the desired coaction with the auditory canal, it has been found advantageous to implement the head portion at least substan-- 3a - 22819-531 tially in the way described in our previously mentioned United States patent 4,314,553.
The head portion in other words preferably includes an essentially conically shaped, hollow wall element, the apex portion of which is internally ~oined to, or merges with, the forward end of the shank portion, the wall element extending backwards over the shank portion and separate from it, there being spacer members distributed circumferentially between 4 ~2~ 63 the inner surface of the wall element and the shank portion.
Advantageously the spacer members are lamella-like and extend in the direction of the shank in radial planes suitably dis-tributed round the shank portion. The latter, with its middle section which is to be stiffened in accordance with the in-vention, the wall element and the spacer members are advanta-geously fabricated integrally from an elastic material, such as a suitable soft plastics. According to the invention it is suitable to stiffen the shank portion up to the vinicity of the spacer members, so that there is a pronounced articulation zone here as well.
In continuation, the invention will be described in more detail with the aid of an embodiment and with reference to the accompanying drawings.
Short description of Drawings Fig. 1 is a schematic view of an embodiment of the in-ventive earplug device, one earplug being shown in an axial, longitudinal section, the device also being shown by chain--dotted lines in a folded state.
Fig. 2 is an exploded view further illustrating the con-struction of the earplug and its attachement to the associated headband end.
Description of Embodiment The inventive earplug device illustrated in Figs. 1 and 2 includes a foldable headband 1, at either end of which res-pective earplugs 3 and 5 are connected. Each earplug comprises à head portion 7 with an integral stem-like shank portion 9, both of soft, elastic plastics material, a tubular stiffening sleeve 11 of stiff plastics and an outer foamed plastics pro-tection muff 13. The shank portion 9 is tubular with a cent-ral, longitudinal bore 10, which is open at the free rear end of the shank portion.
For the attachment of an earplug the respective headband end is provided with a mounting member 15 including a support-ing boss 17 on the inside, from the middle of which an _ . _ , _, , . ,, . . _ _ _ .. _ _ _ . _ . _ .. . -- .. . .. ... . .. .. . .. ... . .. ... .. . . .
~ 3 attachment pin 19 projects at right angles inwardly, i.e.towards the other headband end. The pin 19, which has its for~ard end 21 conical and formed as a latching member, extends substantially at right angles to the direction of the headband end and is intended to be thrust into the bore 10 in the shank portion 9 and be retained therein.
In assembling the earplug device in accordance with the invention, the stiffening sleeve 11 is first mounted on the shank portion 9. The inside diameter of the sleeve corres-ponds to the outside diameter of the shank portion 9 such thatthe sleeve sits on the shank portion with a good fit. The forward edge of the sleeve 11 is brought to lie flush with the rear edge of the head portion 7. The protective muff 13 is now placed outside the shank portion 9 and sleeve 11. The pin 19 is then inserted in the bore 10 until the rear end of the shank portion engages against the boss 17. The pin 19 has a larger diameter than that of the bore 10, the end section of the shank portion thus expanding round the pin 19, and this in combination with the latchingfunct-ion of the pin makes the fixture very good. The lengths of the pin 19, sleeve 11 and shank portion 9 behind the head portion 7 are selected such that the rear portion of the sleeve 11 lies immediately in front of, or flush with the tip of the pin 19, there thus be-ing obtained a well-defined articuation zone just between the pin and the sleeve. The articulation zone thus coincides with the region where the material in the shank portion begins to expand conically.
The pin diameter is selected such that the outside dia-meter of the expanded, affixed shank end section is substan-tially the same as the outside diameter of the sleeve 11. Theouter protective muff of soft foamed plastics is thrust over so that it covers the expanded shank portion and at least the major part of the sleeve 11.
The integrated combination of the head por-tion 7 and shank portion 9, excepting the hole or bore 10, is implement-ed in accordance with what is described in our previously mentioned U.S. patent 4,314,553. The head portion thus 6 ~2~6~6~
includes a substantially conical, hollow wall element 25, with its apex portion internally joined to the forward end of the shank portion 9. The wall element extends backwards over the shank portion and spaced therefrom. Between the inner surface of the wall element 25 and the circumferential surface of the shank portion there extend integrated lamella-like spacer members with extension in the shank direction in radial planes distributed round the shank portion. The rear edge of the spacer members is flush with the rear edge of the wall element 25. The sleevellextends forwards to the vicinity of the rear edges of the spacer members such as to form an arti-culation zone here.
The described, inventive earplug device is foldable insofar as the headband 1 is provided with articulation mem-bers 27 on either leg side, enabling the lower leg portionsof the headband to be folded towards each other, as illustra-ted by the chain-dotted lines in Fig. 1.
, The invention is of course not restricted to the illu-j strated and described embodiment, and amendmen~ and modifi ! ~o cations are possible within the scope of the invention as it defined in the following claims.
The inventive earplug device is thus essentially dis-tinguished in that the shank portion of the respective earplug is stiffened and connected both to the head portion and to the headband in a manner such as to provide articulation, thus forming a doubly articulated shank configuration. The term "articulation" is here to be given wide meaning and does not require the arrangement of special articulation means.
The doubly articulated shank configuration in accordance with the invention has been found to result in that the head por~ion of the respective earplug, coacting with the auditory canal, may easily and effectively be caused to assume the best position from the sealing or closing-off aspect by the legs or side portions of the headband being moved somewhat backwards and forwards while a light inward pressure is appli-ed to them. The best position thus obtained wi~l then remain, at least substantially, and essentially independent of unav~d-able small movements of the headband. This effect is not obtained with prior art earplugs carried by a headband.
According to the invention, it is preferred to have at least substantially equal ariculations at the two ends of the shank portion.
The articulation in accordance with the invention is advantageously achieved by the material in the respectSlhv~ end and/or in connecting parts of the device being so elastic in relation to remaining connection material that bending prima-rily takes place here. According to a preferred embodiment,the shank portion may thus include a stiff middle section in association with substantially less stiff end sections, which will consequently be relatively flexible and deflectable~
these sections being connected to the head portion of the earplug and the headband, respectively.
Although the shank portion, which is preferably inte-gral with its associated head portion, could have an integrated, ~ 3 ~ ~2~ 3 22819-531 stiffer middle section, i-t is in accordance with the invention advantageous to let the shank portion include a shaft section of elastic material with a middle portion stiffened by one or more separate stiffening members. The latter may advan-tageously com-prise a stiffer tubular sleeve or the like, surrounding the middle portion of the shaft section, the sleeve thus leaving end portions of the shaft section free to function as articulation elements.
It has been found particularly advantageous to have a tubular shaft section, i.e. one with a central bore. There is thus achieved very good articulation on both sides of the stiffen-ed middle section.
The utilisation of a tubular shaft section also invol-ves that connection to the headband can be accomplished in a very advantageous manner, namely by using a pin or the like, pro-jecting from the headband and into the bore of the shaft section.
The pin suitably enters as far as the vicinity of the zone where the shank portion stiffening starts, so that a well defined articulation zone is obtained. Particularly advantageous is that the diameter of the pin is greater than that of the bore, so that ~0 the headband end portion of the shaft section will be expanded~
articulation then being clearly pronounced just where the expansion begins.
Although the head portion of the respective earplug can be conceived as being implemented in many different ways, depending on the desired coaction with the auditory canal, it has been found advantageous to implement the head portion at least substan-- 3a - 22819-531 tially in the way described in our previously mentioned United States patent 4,314,553.
The head portion in other words preferably includes an essentially conically shaped, hollow wall element, the apex portion of which is internally ~oined to, or merges with, the forward end of the shank portion, the wall element extending backwards over the shank portion and separate from it, there being spacer members distributed circumferentially between 4 ~2~ 63 the inner surface of the wall element and the shank portion.
Advantageously the spacer members are lamella-like and extend in the direction of the shank in radial planes suitably dis-tributed round the shank portion. The latter, with its middle section which is to be stiffened in accordance with the in-vention, the wall element and the spacer members are advanta-geously fabricated integrally from an elastic material, such as a suitable soft plastics. According to the invention it is suitable to stiffen the shank portion up to the vinicity of the spacer members, so that there is a pronounced articulation zone here as well.
In continuation, the invention will be described in more detail with the aid of an embodiment and with reference to the accompanying drawings.
Short description of Drawings Fig. 1 is a schematic view of an embodiment of the in-ventive earplug device, one earplug being shown in an axial, longitudinal section, the device also being shown by chain--dotted lines in a folded state.
Fig. 2 is an exploded view further illustrating the con-struction of the earplug and its attachement to the associated headband end.
Description of Embodiment The inventive earplug device illustrated in Figs. 1 and 2 includes a foldable headband 1, at either end of which res-pective earplugs 3 and 5 are connected. Each earplug comprises à head portion 7 with an integral stem-like shank portion 9, both of soft, elastic plastics material, a tubular stiffening sleeve 11 of stiff plastics and an outer foamed plastics pro-tection muff 13. The shank portion 9 is tubular with a cent-ral, longitudinal bore 10, which is open at the free rear end of the shank portion.
For the attachment of an earplug the respective headband end is provided with a mounting member 15 including a support-ing boss 17 on the inside, from the middle of which an _ . _ , _, , . ,, . . _ _ _ .. _ _ _ . _ . _ .. . -- .. . .. ... . .. .. . .. ... . .. ... .. . . .
~ 3 attachment pin 19 projects at right angles inwardly, i.e.towards the other headband end. The pin 19, which has its for~ard end 21 conical and formed as a latching member, extends substantially at right angles to the direction of the headband end and is intended to be thrust into the bore 10 in the shank portion 9 and be retained therein.
In assembling the earplug device in accordance with the invention, the stiffening sleeve 11 is first mounted on the shank portion 9. The inside diameter of the sleeve corres-ponds to the outside diameter of the shank portion 9 such thatthe sleeve sits on the shank portion with a good fit. The forward edge of the sleeve 11 is brought to lie flush with the rear edge of the head portion 7. The protective muff 13 is now placed outside the shank portion 9 and sleeve 11. The pin 19 is then inserted in the bore 10 until the rear end of the shank portion engages against the boss 17. The pin 19 has a larger diameter than that of the bore 10, the end section of the shank portion thus expanding round the pin 19, and this in combination with the latchingfunct-ion of the pin makes the fixture very good. The lengths of the pin 19, sleeve 11 and shank portion 9 behind the head portion 7 are selected such that the rear portion of the sleeve 11 lies immediately in front of, or flush with the tip of the pin 19, there thus be-ing obtained a well-defined articuation zone just between the pin and the sleeve. The articulation zone thus coincides with the region where the material in the shank portion begins to expand conically.
The pin diameter is selected such that the outside dia-meter of the expanded, affixed shank end section is substan-tially the same as the outside diameter of the sleeve 11. Theouter protective muff of soft foamed plastics is thrust over so that it covers the expanded shank portion and at least the major part of the sleeve 11.
The integrated combination of the head por-tion 7 and shank portion 9, excepting the hole or bore 10, is implement-ed in accordance with what is described in our previously mentioned U.S. patent 4,314,553. The head portion thus 6 ~2~6~6~
includes a substantially conical, hollow wall element 25, with its apex portion internally joined to the forward end of the shank portion 9. The wall element extends backwards over the shank portion and spaced therefrom. Between the inner surface of the wall element 25 and the circumferential surface of the shank portion there extend integrated lamella-like spacer members with extension in the shank direction in radial planes distributed round the shank portion. The rear edge of the spacer members is flush with the rear edge of the wall element 25. The sleevellextends forwards to the vicinity of the rear edges of the spacer members such as to form an arti-culation zone here.
The described, inventive earplug device is foldable insofar as the headband 1 is provided with articulation mem-bers 27 on either leg side, enabling the lower leg portionsof the headband to be folded towards each other, as illustra-ted by the chain-dotted lines in Fig. 1.
, The invention is of course not restricted to the illu-j strated and described embodiment, and amendmen~ and modifi ! ~o cations are possible within the scope of the invention as it defined in the following claims.
Claims (9)
1. Earplug device including two earplugs and an elastic headband, an earplug being connected to either end of the headband and each earplug including a shank portion, with its rear end connected to the headband and its forward end provided with a head portion arranged for coaction with the auditory canal of an ear for closing off said canal, said shank portion being stiffened and connected both to the head portion and to the headband such as to provide articu-lation, thus forming a doubly articulated shank configurat-ion, the stiffened shank portion including a stiff middle section and flexible end sections, which are connected to the head portion and the headband, respectively.
2. Earplug device as claimed in claim 1, wherein the stiffened shank portion includes a shaft section of elastic material with a middle portion stiffened by a surrounding, stiff, tubular sleeve or the like, the flexible end portions of the shaft section being respectively connected to the head portion and the headband such that the desired articulation is obtained.
3. Earplug device as claimed in claim 1 wherein the shank portion is tubular and has a central bore.
4. Earplug device as claimed in claim 3, wherein the shank portion is connected to the headband with the aid of a pin or the like, projecting from the headband and thrusting into the bore at the corresponding end of the shank portion up to the vicinity of the end of the sleeve facing towards the headband end.
5. Earplug device as claimed in claim 4, wherein the diameter of the pin is greater than that of the bore, so that the headband end of the shank portion will be expanded, the end of the sleeve facing towards the headband connecting to the expanded shank portion end.
6. Earplug device as claimed in claim 3, wherein the head portion includes a substantially conical, hollow wall element with its apex portion internally joined to the forward end of the shank portion, the wall element extending backwards in over the shank portion and separate therefrom, there also being spacer members distributed circumferential-ly between the inner surface of the wall element and the shank portion.
7. Earplug device as claimed in claim 6, wherein the spacer members are lamella-like and extend in the direction of the shank in radial planes.
8. Earplug device as claimed in claim 7, wherein the forward end of the shank portion, the wall element and the spacer members are integrally made in an elastic material such as soft plastics.
9. Earplug device as claimed in claim 8, wherein the shank portion is forwardly stiffened up to, or close to the spacer members.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE8406042A SE449949B (en) | 1984-11-29 | 1984-11-29 | EARNESS CONNECTION DEVICE INCLUDING TWO EARNESS CONNECTORS AND AN ELASTIC BOARD |
| SE8406042-5 | 1984-11-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1246463A true CA1246463A (en) | 1988-12-13 |
Family
ID=20357973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000496374A Expired CA1246463A (en) | 1984-11-29 | 1985-11-28 | Earplug device |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US4671265A (en) |
| CA (1) | CA1246463A (en) |
| DE (1) | DE8533276U1 (en) |
| SE (1) | SE449949B (en) |
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| US4819624A (en) * | 1987-06-18 | 1989-04-11 | Leight Howard S | Banded earplug |
| US5224495A (en) * | 1992-02-25 | 1993-07-06 | Robinson James H | Sun and sound shielding arrangement |
| US5249309A (en) * | 1992-09-17 | 1993-10-05 | Bilsom Ab | Ear defender |
| US5792998A (en) * | 1993-04-19 | 1998-08-11 | Cabot Safety Intermediate Corporation | Acoustical hearing protective devices utilizing dynamically stiff foam and methods of producing same |
| US5449008A (en) * | 1994-01-04 | 1995-09-12 | Yeh; Chia-Ching | Foldable hair clasp |
| US5541677A (en) * | 1994-12-28 | 1996-07-30 | Keith Huhtala | Spectacles retaining strap with connected earplugs |
| USD378127S (en) * | 1995-09-25 | 1997-02-18 | Brown John J | Ear plug |
| CA2257790A1 (en) * | 1996-02-23 | 1997-08-28 | University Research Engineers & Associates, Inc. | In-ear-canal audio receiver and stethoscope having the same |
| US7162039B1 (en) | 1996-02-23 | 2007-01-09 | Matthew G. Callahan | Noise barrier apparatus having acoustic wave damping cushions |
| DE29611562U1 (en) * | 1996-07-03 | 1996-10-24 | Bilsom Ab | Ear muffs |
| JPH11500345A (en) * | 1996-08-15 | 1999-01-12 | カボット セイフティ インターメディエイト コーポレーション | Device with rotatable legs |
| US5799658A (en) * | 1996-08-15 | 1998-09-01 | Cabot Safety Intermediate Corporation | Hearing protective device comprising a foam and a porous component and method of manufacture thereof |
| US5809574A (en) * | 1996-08-15 | 1998-09-22 | Cabot Safety Intermediate Corporation | Hearing protection device |
| US6056082A (en) * | 1997-05-09 | 2000-05-02 | 3M Innovative Properties Company | Ergonomic banded ear plug |
| USD422693S (en) * | 1997-05-09 | 2000-04-11 | 3M Innovative Properties Company | Portion of an ergonomic band for ear plugs |
| US5781272A (en) * | 1997-06-06 | 1998-07-14 | Safety+Plus, Inc. | Eyesight protection apparatus with attached earplugs |
| US6176576B1 (en) | 1997-06-06 | 2001-01-23 | Radians, Inc. | Eyewear supported by a wearer's concha of an ear |
| USD415833S (en) * | 1998-03-10 | 1999-10-26 | Cabot Safety Intermediate Corporation | Hearing protection device |
| USD409743S (en) * | 1998-10-28 | 1999-05-11 | Cabot Safety Intermediate Corporation | Hearing protection device |
| USD426845S (en) * | 1999-05-03 | 2000-06-20 | Radians, Inc. | Eyewear |
| US6129175A (en) * | 1999-05-07 | 2000-10-10 | Radians, Inc. | Acoustical control plastisol earpieces |
| USD435058S (en) * | 2000-04-04 | 2000-12-12 | Radians, Inc. | Eyewear |
| US6484726B1 (en) | 2000-06-30 | 2002-11-26 | 3M Innovative Properties Company | Articulating earplug |
| US20020124851A1 (en) * | 2000-11-28 | 2002-09-12 | Richard Knauer | Hearing protective device and method of making same |
| EP1467689B1 (en) * | 2002-01-25 | 2016-10-26 | 3M Innovative Properties Company | Hearing protection device |
| US20040045558A1 (en) * | 2002-09-06 | 2004-03-11 | Duncan Taylor | Earplug and method of manufacturing an earplug |
| US7464786B2 (en) * | 2004-06-11 | 2008-12-16 | Cabot Safety Intermediate Corporation | High sound attenuating hearing protection device |
| US7388766B2 (en) * | 2004-08-26 | 2008-06-17 | Curtiss-Wright Electro-Mechanical Corporation | Harmonic control and regulation system for harmonic neutralized frequency changer |
| WO2006079147A1 (en) * | 2004-11-11 | 2006-08-03 | Nicholas Edward Curzon | Mount for an acoustic device |
| DE102006056219A1 (en) * | 2006-11-29 | 2008-06-05 | Uvex Arbeitsschutz Gmbh | Protective device, such as safety glasses, hearing protection or the like |
| WO2010040367A1 (en) * | 2008-10-08 | 2010-04-15 | Moldex-Metric Ag & Co. Kg | Hearing protection device |
| USD885362S1 (en) * | 2018-10-18 | 2020-05-26 | Hmd Global Oy | Earphones and case |
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| US968008A (en) * | 1909-03-23 | 1910-08-23 | Charles W Waller | Noise-arrester. |
| US997673A (en) * | 1910-08-04 | 1911-07-11 | Martin E Hegge | Ear-closing device. |
| US2670737A (en) * | 1950-09-11 | 1954-03-02 | Jacob J Cantor | Ear protector |
| US3301253A (en) * | 1965-01-21 | 1967-01-31 | Glorig Aram | Ear protector |
| US4314553A (en) * | 1979-08-08 | 1982-02-09 | Bilsom Ab | Earplug and earplug set |
| US4490857A (en) * | 1982-10-12 | 1985-01-01 | Leight Howard S | Band earplug |
-
1984
- 1984-11-29 SE SE8406042A patent/SE449949B/en not_active IP Right Cessation
-
1985
- 1985-11-26 US US06/801,958 patent/US4671265A/en not_active Expired - Lifetime
- 1985-11-26 DE DE8533276U patent/DE8533276U1/en not_active Expired
- 1985-11-28 CA CA000496374A patent/CA1246463A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| US4671265A (en) | 1987-06-09 |
| SE8406042L (en) | 1986-05-30 |
| SE449949B (en) | 1987-06-01 |
| SE8406042D0 (en) | 1984-11-29 |
| DE8533276U1 (en) | 1986-01-23 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKEX | Expiry |