US20050283882A1 - High attenuating earmuff device - Google Patents
High attenuating earmuff device Download PDFInfo
- Publication number
- US20050283882A1 US20050283882A1 US11/041,383 US4138305A US2005283882A1 US 20050283882 A1 US20050283882 A1 US 20050283882A1 US 4138305 A US4138305 A US 4138305A US 2005283882 A1 US2005283882 A1 US 2005283882A1
- Authority
- US
- United States
- Prior art keywords
- foam
- earmuff
- cushion
- values
- high density
- 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
- 239000006260 foam Substances 0.000 claims abstract description 34
- 230000000712 assembly Effects 0.000 claims abstract description 23
- 238000000429 assembly Methods 0.000 claims abstract description 23
- 229920000642 polymer Polymers 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 12
- 238000013016 damping Methods 0.000 claims abstract description 6
- 239000004619 high density foam Substances 0.000 claims abstract description 6
- 230000003068 static effect Effects 0.000 claims abstract description 6
- 101001010782 Drosophila melanogaster Fez family zinc finger protein erm Proteins 0.000 description 51
- 210000003128 head Anatomy 0.000 description 9
- 210000005069 ears Anatomy 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 210000003027 ear inner Anatomy 0.000 description 1
- 239000006261 foam material Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
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
- A61F11/14—Protective devices for the ears external, e.g. earcaps or earmuffs
Definitions
- This invention relates generally to acoustic hearing protective devices and, more particularly, to an earmuff device comprising foam materials for providing a wearer with a high sound attenuation.
- Earmuff devices are commonly used to protect against hearing damage in environments where noise levels are not able to be controlled within safe limits.
- Such devices generally include a pair of rigid cups connected by a head band, each cup having an interior lined with an acoustical material and a cushion extending from the cup toward the head of a wearer to seal the respective cup to the wearer's head around the ear.
- earmuff devices are recognized as having certain advantages over other forms of hearing protection devices, such as earplugs. For example, earmuffs are preferred for intermittent use where continuous insertion and removal of earplugs would be annoying or impractical. Additionally, earmuffs provide superior comfort properties over earplugs and other hearing protection devices particularly due to the soft cushion which contacts the head of a wearer and due to the absence of items inserted into the ear.
- an earmuff which provides a high level of sound attenuation but is comfortable when worn, practical to use, and simple and economical to manufacture.
- An earmuff device including a connecting band having opposing first and second ends, a pair of earmuff cup assemblies connected to the opposing first and second ends of the connecting band, a first foam disposed at the earmuff cup assemblies, and a second foam disposed at the earmuff cup assemblies, where the first foam comprises a moderately high density foam having highly engineered polymer transition properties with precise loss factor values, modulus values, and polymer transition values and maximum damping at prescribed temperature and frequency conditions, and where the second foam comprises a moderately high density hydrophilic foam particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness.
- An earmuff cup, an earmuff cushion, and an earmuff liner including the respective first and/or second foams, are also provided.
- FIG. 1 is a front elevational view of a earmuff assembly of the invention.
- FIG. 2 is a perspective view of an earmuff cup of FIG. 1 .
- FIGS. 1 and 2 An earmuff device 10 is shown in FIGS. 1 and 2 in an exemplary embodiment of the invention.
- the earmuff device 10 broadly comprises a generally U-shaped, resilient connecting band 12 and a pair of earmuff cup assemblies 14 and 16 connected to opposite ends of connecting band 12 .
- the ear muff cup assemblies 14 and 16 are affixed to the connecting band 12 in any desired manner. Most preferably, earmuff cup assemblies 14 and 16 may be connected to an adapter which, in turn, is connected to the band 12 .
- the adapter may be configured to allow the ear muff cup assemblies 14 and 16 to pivot or rotate relative the band 12 or, alternatively, the adapter may hold the assemblies 14 and 16 fixedly on the band 12 , etc.
- Each of the earmuff cup assemblies 14 and 16 comprises a rigid earmuff cup 18 , a cushion 20 , and an earmuff cup liner 22 .
- Rigid cup 18 is generally formed of two pieces, a cup shaped portion 24 and a cushion seal plate 26 , which are fixed together at an interface, for example, by sonic welding, etc.
- the cushion 20 is fixed to the cushion seal plate 26 and extends from the rigid earmuff cup 18 .
- the earmuff liner 22 is disposed at an interior of the rigid earmuff cup 18 .
- the cushion 20 and earmuff cup liner 22 are shaped as desired to appropriately fit on the rigid earmuff cup 18 and to provide adequate fit and comfort to the wearer.
- the cushion 20 and the liner 22 may be substantial round in shape or square, etc.
- the earmuff device 10 is intended to be applied over the head of a wearer with the ear muff cup assemblies 14 and 16 fitted over the ears so that the ears extend entirely into the interior of the rigid earmuff cups 18 and the cushions 20 seal around the ears.
- the resilient connecting band 12 is worn around the head to hold the earmuff device 10 thereon.
- the band 12 may extend over the crown or around the back of the head, or under the chin, etc.
- the connecting band 12 possesses a tension which fits the ear muff cup assemblies 14 and 16 tightly, but comfortably over the ears.
- the ear muff cup assemblies 14 and 16 effectively seal the ears from the outer environment. That is, the earmuff cup assemblies 14 and 16 act as a barrier between the inner ear of the wearer and sounds emanating in the outer environment. In particular, the cushions 20 and the earmuff cup liner 22 attenuate the passage of sound from the outer environment into the ears.
- the cushions 20 and the earmuff cup liner 22 are formed any material(s) sufficient to provide high sound attenuation to the wearer.
- materials are used to compose the cushions 20 and the earmuff cup liner 22 such that the earmuff device 10 provides a sound attenuation having a Noise Reduction Rating (hereinafter, “NRR”) of 30 db or greater.
- NRR Noise Reduction Rating
- the cushion 20 comprises a moderately high density foam having highly engineered polymer transition properties with precise loss factor values, modulus values, and polymer transition values and maximum damping at prescribed temperature and frequency conditions.
- the cushion 20 may be composed of a urethane foam having the above-mentioned properties, such as a foam available under the trade name, CONFOR.
- the foam of the cushion 20 may be of a homogenous construction or may be formed as laminate sheets adhered together to form the cushion 20 .
- the cushion 20 may further include an outer liner of a vinyl material, etc., essentially covering the inner urethane foam.
- cushion 20 may be cylindrical, round, or rectangular to fit the generally matching earmuff cup 14 and 16 design in a reasonable manner.
- Cushion 20 is quite flexible and may also be made to a shape requiring deformation to fit earmuff cup assemblies 14 and 16 .
- Cushion 20 defines a central opening 21 which generally has a shape which matches the shape of cushion 20 . Opening 21 is generally aligned with the internal portions of an ear such that the ear may be received within the rigid earmuff cup 18 , as described above.
- An exemplary cushion 20 is disclosed in commonly assigned U.S. Pat. No. 5,420,381 to Gardner Jr. et al., which is hereby incorporated in its entirety.
- the earmuff cup liner 22 generally comprises an open cell foam or other material containing open pores of size and shape sufficient to absorb sound and provide high attenuation, as discussed above.
- the earmuff cup liner 22 is preferably formed of a moderately high density hydrophilic foam which is particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness.
- the liner 22 may be composed of a relatively soft urethane foam possessing the above-mentioned properties, such as a urethane foam currently produced by Lendell Manufacturing, Inc (LMI).
- LMI Lendell Manufacturing, Inc
- the invention provides an earmuff device which is lightweight and comfortable when worn and which provides a high sound attenuation, preferably, an attenuation having an NRR of 30 or more. More particularly, the earmuff device of the invention comprises acoustic foams specifically designed and utilized to provided the wearer with this high sound attenuation, while maintaining comfort and practicality properties of the earmuff device.
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- Biophysics (AREA)
- Otolaryngology (AREA)
- Psychology (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
- Helmets And Other Head Coverings (AREA)
- Bedding Items (AREA)
- Orthopedics, Nursing, And Contraception (AREA)
- Headphones And Earphones (AREA)
Abstract
Description
- This application is related to and claims the benefit of U.S. Provisional Patent Application Ser. No. 60/538,612 filed on Jan. 23, 2004, which said application is herein incorporated by reference in its entirety.
- 1. Field of the Invention
- This invention relates generally to acoustic hearing protective devices and, more particularly, to an earmuff device comprising foam materials for providing a wearer with a high sound attenuation.
- 2. Brief Discussion of the Prior Art:
- Earmuff devices are commonly used to protect against hearing damage in environments where noise levels are not able to be controlled within safe limits. Such devices generally include a pair of rigid cups connected by a head band, each cup having an interior lined with an acoustical material and a cushion extending from the cup toward the head of a wearer to seal the respective cup to the wearer's head around the ear.
- Such, earmuff devices are recognized as having certain advantages over other forms of hearing protection devices, such as earplugs. For example, earmuffs are preferred for intermittent use where continuous insertion and removal of earplugs would be annoying or impractical. Additionally, earmuffs provide superior comfort properties over earplugs and other hearing protection devices particularly due to the soft cushion which contacts the head of a wearer and due to the absence of items inserted into the ear.
- As with other hearing protection devices, maximum sound attenuating capabilities are desired for earmuffs in order to provide the necessary protection against sound exposure. In certain environments, such as at extremely loud industrial or manufacturing plants, at construction or demolition sites, etc., a very high sound attenuation is desired from earmuff devices. Thus far, however, an earmuff has not been achieved which can provided a suitably high sound attenuation while still providing the comfort and practicability features so desired by the wearer.
- Many attempts have been made at increasing the sound attenuation of known earmuffs. These attempts have included reducing acoustic leaks through or around muff cups, increasing the mass and/or volume of the cups, increasing head band tension to tighten the fit of the muff cups on the head of a wearer, minimizing resonating surfaces such as flat surfaces, etc. While these attempts may have resulted in increases in attenuation, the resulting earmuff is often found to be bulkier, heavier, more difficult to put on, and generally less comfortable than typical earmuff assemblies.
- Thus, an earmuff is desired which provides a high level of sound attenuation but is comfortable when worn, practical to use, and simple and economical to manufacture.
- An earmuff device is provided, including a connecting band having opposing first and second ends, a pair of earmuff cup assemblies connected to the opposing first and second ends of the connecting band, a first foam disposed at the earmuff cup assemblies, and a second foam disposed at the earmuff cup assemblies, where the first foam comprises a moderately high density foam having highly engineered polymer transition properties with precise loss factor values, modulus values, and polymer transition values and maximum damping at prescribed temperature and frequency conditions, and where the second foam comprises a moderately high density hydrophilic foam particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness. An earmuff cup, an earmuff cushion, and an earmuff liner including the respective first and/or second foams, are also provided.
- The above-discussed and other features and advantages of the present invention will be appreciated and understood by those skilled in the art from the following detailed description and drawings.
- Referring now to the drawings wherein like elements are numbered alike in the several FIGURES:
-
FIG. 1 is a front elevational view of a earmuff assembly of the invention; and -
FIG. 2 is a perspective view of an earmuff cup ofFIG. 1 . - An
earmuff device 10 is shown inFIGS. 1 and 2 in an exemplary embodiment of the invention. Theearmuff device 10 broadly comprises a generally U-shaped, resilient connectingband 12 and a pair ofearmuff cup assemblies band 12. - The ear muff cup assemblies 14 and 16 are affixed to the connecting
band 12 in any desired manner. Most preferably, earmuff cup assemblies 14 and 16 may be connected to an adapter which, in turn, is connected to theband 12. The adapter may be configured to allow the ear muff cup assemblies 14 and 16 to pivot or rotate relative theband 12 or, alternatively, the adapter may hold theassemblies band 12, etc. - Each of the earmuff cup assemblies 14 and 16 comprises a
rigid earmuff cup 18, acushion 20, and anearmuff cup liner 22.Rigid cup 18 is generally formed of two pieces, a cup shapedportion 24 and acushion seal plate 26, which are fixed together at an interface, for example, by sonic welding, etc. Thecushion 20 is fixed to thecushion seal plate 26 and extends from therigid earmuff cup 18. Theearmuff liner 22 is disposed at an interior of therigid earmuff cup 18. Thecushion 20 andearmuff cup liner 22 are shaped as desired to appropriately fit on therigid earmuff cup 18 and to provide adequate fit and comfort to the wearer. For example, thecushion 20 and theliner 22 may be substantial round in shape or square, etc. - The
earmuff device 10 is intended to be applied over the head of a wearer with the ear muff cup assemblies 14 and 16 fitted over the ears so that the ears extend entirely into the interior of therigid earmuff cups 18 and thecushions 20 seal around the ears. The resilient connectingband 12 is worn around the head to hold theearmuff device 10 thereon. For example, theband 12 may extend over the crown or around the back of the head, or under the chin, etc. Further, the connectingband 12 possesses a tension which fits the ear muff cup assemblies 14 and 16 tightly, but comfortably over the ears. - When the
earmuff device 10 is properly worn as described, the ear muff cup assemblies 14 and 16 effectively seal the ears from the outer environment. That is, the earmuff cup assemblies 14 and 16 act as a barrier between the inner ear of the wearer and sounds emanating in the outer environment. In particular, thecushions 20 and theearmuff cup liner 22 attenuate the passage of sound from the outer environment into the ears. - The
cushions 20 and theearmuff cup liner 22 are formed any material(s) sufficient to provide high sound attenuation to the wearer. In a preferred embodiment, materials are used to compose thecushions 20 and theearmuff cup liner 22 such that theearmuff device 10 provides a sound attenuation having a Noise Reduction Rating (hereinafter, “NRR”) of 30 db or greater. - In a preferred embodiment, the
cushion 20 comprises a moderately high density foam having highly engineered polymer transition properties with precise loss factor values, modulus values, and polymer transition values and maximum damping at prescribed temperature and frequency conditions. For example, thecushion 20 may be composed of a urethane foam having the above-mentioned properties, such as a foam available under the trade name, CONFOR. The foam of thecushion 20 may be of a homogenous construction or may be formed as laminate sheets adhered together to form thecushion 20. Thecushion 20 may further include an outer liner of a vinyl material, etc., essentially covering the inner urethane foam. - The shape of
cushion 20 may be cylindrical, round, or rectangular to fit the generally matchingearmuff cup earmuff cup assemblies cushion 20. Opening 21 is generally aligned with the internal portions of an ear such that the ear may be received within therigid earmuff cup 18, as described above. Anexemplary cushion 20 is disclosed in commonly assigned U.S. Pat. No. 5,420,381 to Gardner Jr. et al., which is hereby incorporated in its entirety. - The
earmuff cup liner 22 generally comprises an open cell foam or other material containing open pores of size and shape sufficient to absorb sound and provide high attenuation, as discussed above. Theearmuff cup liner 22 is preferably formed of a moderately high density hydrophilic foam which is particularly employed for optimal property convergence in cell size, air flow, density, and static stiffness. For example, theliner 22 may be composed of a relatively soft urethane foam possessing the above-mentioned properties, such as a urethane foam currently produced by Lendell Manufacturing, Inc (LMI). - The invention, as set forth in exemplary embodiments herein, provides an earmuff device which is lightweight and comfortable when worn and which provides a high sound attenuation, preferably, an attenuation having an NRR of 30 or more. More particularly, the earmuff device of the invention comprises acoustic foams specifically designed and utilized to provided the wearer with this high sound attenuation, while maintaining comfort and practicality properties of the earmuff device.
- While the invention has been described with reference to an exemplary embodiment, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from the essential scope thereof. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed as the best mode contemplated for carrying out this invention, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/041,383 US20050283882A1 (en) | 2004-01-23 | 2005-01-24 | High attenuating earmuff device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US53861204P | 2004-01-23 | 2004-01-23 | |
US11/041,383 US20050283882A1 (en) | 2004-01-23 | 2005-01-24 | High attenuating earmuff device |
Publications (1)
Publication Number | Publication Date |
---|---|
US20050283882A1 true US20050283882A1 (en) | 2005-12-29 |
Family
ID=34825995
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/041,383 Abandoned US20050283882A1 (en) | 2004-01-23 | 2005-01-24 | High attenuating earmuff device |
Country Status (9)
Country | Link |
---|---|
US (1) | US20050283882A1 (en) |
EP (1) | EP1706082A1 (en) |
CN (1) | CN1909862A (en) |
AU (1) | AU2005209264A1 (en) |
BR (1) | BRPI0506978A (en) |
CA (1) | CA2552653A1 (en) |
NO (1) | NO20062893L (en) |
RU (1) | RU2006130376A (en) |
WO (1) | WO2005072668A1 (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20070044205A1 (en) * | 2005-08-29 | 2007-03-01 | Sato Luciana M | Hearing protective device that includes cellular earmuffs |
US20080307564A1 (en) * | 2003-08-12 | 2008-12-18 | Le Gette Brian E | Ear Warmer With a Substantially Continuous Surface |
US20090205900A1 (en) * | 2008-02-20 | 2009-08-20 | Ricky Wayne Purcell | Hearing protection cap |
WO2010075128A2 (en) * | 2008-12-23 | 2010-07-01 | 3M Innovative Properties Company | Hearing protection process and device |
US20110225705A1 (en) * | 2010-03-16 | 2011-09-22 | 3M Innovative Properties Company | Hearing protective device with moisture resistant earmuff sound absorbers |
US8276709B2 (en) | 2008-12-23 | 2012-10-02 | 3M Innovative Properties Company | Transportation vehicle sound insulation process and device |
US8325961B2 (en) | 2003-08-12 | 2012-12-04 | 180S, Inc. | Ear warmer with a speaker system |
US20130087404A1 (en) * | 2011-10-07 | 2013-04-11 | Hearing Components, Inc. | Foam cushion for headphones |
US8438666B2 (en) | 2000-04-05 | 2013-05-14 | 180S, Inc. | Ear warmer with adjustability |
US8443466B2 (en) * | 2007-01-22 | 2013-05-21 | 180S, Inc. | Ear protection device |
US8713714B2 (en) | 2002-01-28 | 2014-05-06 | 180S, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
US8727071B2 (en) | 2009-06-25 | 2014-05-20 | 3M Innovative Properties Company | Sound barrier for audible acoustic frequency management |
US9132038B2 (en) | 2003-08-12 | 2015-09-15 | 180S, Inc. | Ear warmer having a curved ear portion |
US9241517B2 (en) | 2000-12-29 | 2016-01-26 | 180S, Inc. | Ear protection device |
USD780378S1 (en) | 2016-07-15 | 2017-02-28 | Julia Chow | Ear muff |
USD998592S1 (en) * | 2019-10-18 | 2023-09-12 | Jsp Limited | Ear defender ear cup |
US20240115425A1 (en) * | 2022-10-06 | 2024-04-11 | Wade David Pye | Ear covering device |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8590539B2 (en) * | 2009-06-23 | 2013-11-26 | 3M Innovative Properties Company | Headgear-earwear assembly and a method of assembling same |
EP3582730A1 (en) | 2017-02-16 | 2019-12-25 | 3M Innovative Properties Company | Earmuff hearing-protection device comprising sound-attenuating members |
CN111698598B (en) * | 2020-03-17 | 2021-11-09 | 苏州力耘智能科技有限公司 | Design method of passive noise reduction earmuffs |
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US3637040A (en) * | 1968-08-01 | 1972-01-25 | Amplivox Ltd | Ear defenders |
US3644939A (en) * | 1970-10-12 | 1972-02-29 | American Optical Corp | Air damped hearing protector earseal |
US4674134A (en) * | 1985-03-25 | 1987-06-23 | Bilsom Ab | Earmuff having sealing ring including liquid and foam plastic layers |
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NL8901482A (en) * | 1989-06-12 | 1991-01-02 | Focus Veilig Bv | HEARING PROTECTOR. |
US5020163A (en) * | 1989-06-29 | 1991-06-04 | Gentex Corporation | Earseal for sound-attenuating earcup assembly |
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-
2005
- 2005-01-24 CN CNA2005800023680A patent/CN1909862A/en active Pending
- 2005-01-24 AU AU2005209264A patent/AU2005209264A1/en not_active Abandoned
- 2005-01-24 US US11/041,383 patent/US20050283882A1/en not_active Abandoned
- 2005-01-24 CA CA002552653A patent/CA2552653A1/en not_active Abandoned
- 2005-01-24 WO PCT/US2005/002159 patent/WO2005072668A1/en active Application Filing
- 2005-01-24 RU RU2006130376/14A patent/RU2006130376A/en not_active Application Discontinuation
- 2005-01-24 BR BRPI0506978-5A patent/BRPI0506978A/en not_active Application Discontinuation
- 2005-01-24 EP EP05706047A patent/EP1706082A1/en not_active Withdrawn
-
2006
- 2006-06-20 NO NO20062893A patent/NO20062893L/en not_active Application Discontinuation
Patent Citations (8)
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US2883672A (en) * | 1957-09-06 | 1959-04-28 | Mine Safety Appliances Co | Device for protecting ears from noise |
US3637040A (en) * | 1968-08-01 | 1972-01-25 | Amplivox Ltd | Ear defenders |
US3644939A (en) * | 1970-10-12 | 1972-02-29 | American Optical Corp | Air damped hearing protector earseal |
US4674134A (en) * | 1985-03-25 | 1987-06-23 | Bilsom Ab | Earmuff having sealing ring including liquid and foam plastic layers |
US5023955A (en) * | 1989-04-13 | 1991-06-18 | Gentex Corporation | Impact-absorbing sound-attenuating earcup |
US5243709A (en) * | 1991-09-04 | 1993-09-14 | Natus Medical, Inc. | Acoustically sealing earmuff for an infant |
US5420381A (en) * | 1993-04-19 | 1995-05-30 | Cabot Safety Corporation | Acoustical earmuff |
US5996123A (en) * | 1998-10-16 | 1999-12-07 | Bacon Usa Safety, Inc. | Earmuff for noise blocking |
Cited By (35)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8438666B2 (en) | 2000-04-05 | 2013-05-14 | 180S, Inc. | Ear warmer with adjustability |
US9241517B2 (en) | 2000-12-29 | 2016-01-26 | 180S, Inc. | Ear protection device |
US8713714B2 (en) | 2002-01-28 | 2014-05-06 | 180S, Inc. | Apparatus and method for making an ear warmer and an ear warmer frame |
US8325961B2 (en) | 2003-08-12 | 2012-12-04 | 180S, Inc. | Ear warmer with a speaker system |
US10111781B2 (en) | 2003-08-12 | 2018-10-30 | 180S, Inc. | Ear warmer with a substantially continuous surface |
US9259355B2 (en) | 2003-08-12 | 2016-02-16 | 180S, Inc. | Ear warmer with fabric member |
US20080307564A1 (en) * | 2003-08-12 | 2008-12-18 | Le Gette Brian E | Ear Warmer With a Substantially Continuous Surface |
US9132038B2 (en) | 2003-08-12 | 2015-09-15 | 180S, Inc. | Ear warmer having a curved ear portion |
US9066829B2 (en) | 2003-08-12 | 2015-06-30 | 180S, Inc. | Ear warmer with fabric member |
US8861768B2 (en) | 2003-08-12 | 2014-10-14 | 180S, Inc. | Ear warmer with a speaker system |
US20070044205A1 (en) * | 2005-08-29 | 2007-03-01 | Sato Luciana M | Hearing protective device that includes cellular earmuffs |
US7444687B2 (en) * | 2005-08-29 | 2008-11-04 | 3M Innovative Properties Company | Hearing protective device that includes cellular earmuffs |
US8443466B2 (en) * | 2007-01-22 | 2013-05-21 | 180S, Inc. | Ear protection device |
US7717226B2 (en) | 2008-02-20 | 2010-05-18 | Kimberly-Clark Worldwide, Inc. | Hearing protection cap |
US20090205900A1 (en) * | 2008-02-20 | 2009-08-20 | Ricky Wayne Purcell | Hearing protection cap |
US8276709B2 (en) | 2008-12-23 | 2012-10-02 | 3M Innovative Properties Company | Transportation vehicle sound insulation process and device |
WO2010075128A3 (en) * | 2008-12-23 | 2011-02-03 | 3M Innovative Properties Company | Hearing protection process and device |
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US8727071B2 (en) | 2009-06-25 | 2014-05-20 | 3M Innovative Properties Company | Sound barrier for audible acoustic frequency management |
US20110225705A1 (en) * | 2010-03-16 | 2011-09-22 | 3M Innovative Properties Company | Hearing protective device with moisture resistant earmuff sound absorbers |
AU2011227572B2 (en) * | 2010-03-16 | 2014-04-10 | 3M Innovative Properties Company | Hearing protective device with moisture resistant earmuff sound absorbers |
US9902127B2 (en) | 2011-10-07 | 2018-02-27 | Hearing Components, Inc. | Foam cushion for headphones |
US9254227B2 (en) | 2011-10-07 | 2016-02-09 | Hearing Components, Inc. | Foam cushion for headphones |
US20130087404A1 (en) * | 2011-10-07 | 2013-04-11 | Hearing Components, Inc. | Foam cushion for headphones |
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US8960366B2 (en) | 2011-10-07 | 2015-02-24 | Hearing Components, Inc. | Foam cushion for headphones |
US8746397B2 (en) * | 2011-10-07 | 2014-06-10 | Hearing Components, Inc. | Foam cushion for headphones |
USD780378S1 (en) | 2016-07-15 | 2017-02-28 | Julia Chow | Ear muff |
USD998592S1 (en) * | 2019-10-18 | 2023-09-12 | Jsp Limited | Ear defender ear cup |
USD998591S1 (en) * | 2019-10-18 | 2023-09-12 | Jsp Limited | Ear cup |
USD1000413S1 (en) * | 2019-10-18 | 2023-10-03 | Jsp Limited | Ear defender |
USD1001727S1 (en) * | 2019-10-18 | 2023-10-17 | Jsp Limited | Battery pack |
USD1036416S1 (en) * | 2019-10-18 | 2024-07-23 | Jsp Limited | Control pack |
US20240115425A1 (en) * | 2022-10-06 | 2024-04-11 | Wade David Pye | Ear covering device |
Also Published As
Publication number | Publication date |
---|---|
CN1909862A (en) | 2007-02-07 |
RU2006130376A (en) | 2008-02-27 |
CA2552653A1 (en) | 2005-08-11 |
AU2005209264A1 (en) | 2005-08-11 |
WO2005072668A1 (en) | 2005-08-11 |
EP1706082A1 (en) | 2006-10-04 |
BRPI0506978A (en) | 2007-07-03 |
NO20062893L (en) | 2006-09-29 |
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