DE2251774C3 - Gehörschutz - Google Patents
GehörschutzInfo
- Publication number
- DE2251774C3 DE2251774C3 DE2251774A DE2251774A DE2251774C3 DE 2251774 C3 DE2251774 C3 DE 2251774C3 DE 2251774 A DE2251774 A DE 2251774A DE 2251774 A DE2251774 A DE 2251774A DE 2251774 C3 DE2251774 C3 DE 2251774C3
- Authority
- DE
- Germany
- Prior art keywords
- hearing protection
- compression
- protection according
- polymer
- ear canal
- 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
- 230000006835 compression Effects 0.000 claims description 28
- 238000007906 compression Methods 0.000 claims description 28
- 210000000613 ear canal Anatomy 0.000 claims description 23
- 238000011084 recovery Methods 0.000 claims description 21
- 229920000642 polymer Polymers 0.000 claims description 18
- 239000006260 foam Substances 0.000 claims description 17
- 229920003023 plastic Polymers 0.000 claims description 8
- 239000004033 plastic Substances 0.000 claims description 8
- 229920001944 Plastisol Polymers 0.000 claims description 6
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 claims description 6
- 239000004999 plastisol Substances 0.000 claims description 6
- 229920000915 polyvinyl chloride Polymers 0.000 claims description 6
- 239000004014 plasticizer Substances 0.000 claims description 5
- 239000004800 polyvinyl chloride Substances 0.000 claims description 5
- 239000000203 mixture Substances 0.000 description 14
- 239000000463 material Substances 0.000 description 9
- ADCOVFLJGNWWNZ-UHFFFAOYSA-N antimony trioxide Chemical compound O=[Sb]O[Sb]=O ADCOVFLJGNWWNZ-UHFFFAOYSA-N 0.000 description 4
- 238000003780 insertion Methods 0.000 description 4
- 230000037431 insertion Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- XOZUGNYVDXMRKW-AATRIKPKSA-N azodicarbonamide Chemical compound NC(=O)\N=N\C(N)=O XOZUGNYVDXMRKW-AATRIKPKSA-N 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 150000002148 esters Chemical class 0.000 description 3
- 229920001519 homopolymer Polymers 0.000 description 3
- 239000004615 ingredient Substances 0.000 description 3
- 239000003381 stabilizer Substances 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- KAKZBPTYRLMSJV-UHFFFAOYSA-N Butadiene Chemical compound C=CC=C KAKZBPTYRLMSJV-UHFFFAOYSA-N 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 2
- VZCYOOQTPOCHFL-OWOJBTEDSA-N Fumaric acid Chemical compound OC(=O)\C=C\C(O)=O VZCYOOQTPOCHFL-OWOJBTEDSA-N 0.000 description 2
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 2
- -1 Vinyl aromatic compounds Chemical class 0.000 description 2
- 210000000883 ear external Anatomy 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 210000003128 head Anatomy 0.000 description 2
- 238000005470 impregnation Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001629 suppression Effects 0.000 description 2
- 239000004753 textile Substances 0.000 description 2
- VZCYOOQTPOCHFL-UHFFFAOYSA-N trans-butenedioic acid Natural products OC(=O)C=CC(O)=O VZCYOOQTPOCHFL-UHFFFAOYSA-N 0.000 description 2
- GEDVVYWLPUPJJZ-UHFFFAOYSA-N (7-amino-8-methylphenothiazin-3-ylidene)-dimethylazanium;chloride Chemical compound [Cl-].N1=C2C=CC(=[N+](C)C)C=C2SC2=C1C=C(C)C(N)=C2 GEDVVYWLPUPJJZ-UHFFFAOYSA-N 0.000 description 1
- IZMZREOTRMMCCB-UHFFFAOYSA-N 1,4-dichloro-2-ethenylbenzene Chemical compound ClC1=CC=C(Cl)C(C=C)=C1 IZMZREOTRMMCCB-UHFFFAOYSA-N 0.000 description 1
- PGRNEGLBSNLPNP-UHFFFAOYSA-N 1,6-dichloro-3-methylhex-1-ene Chemical compound ClC=CC(C)CCCCl PGRNEGLBSNLPNP-UHFFFAOYSA-N 0.000 description 1
- KTZVZZJJVJQZHV-UHFFFAOYSA-N 1-chloro-4-ethenylbenzene Chemical compound ClC1=CC=C(C=C)C=C1 KTZVZZJJVJQZHV-UHFFFAOYSA-N 0.000 description 1
- IGGDKDTUCAWDAN-UHFFFAOYSA-N 1-vinylnaphthalene Chemical compound C1=CC=C2C(C=C)=CC=CC2=C1 IGGDKDTUCAWDAN-UHFFFAOYSA-N 0.000 description 1
- OMNYXCUDBQKCMU-UHFFFAOYSA-N 2,4-dichloro-1-ethenylbenzene Chemical compound ClC1=CC=C(C=C)C(Cl)=C1 OMNYXCUDBQKCMU-UHFFFAOYSA-N 0.000 description 1
- OEPOKWHJYJXUGD-UHFFFAOYSA-N 2-(3-phenylmethoxyphenyl)-1,3-thiazole-4-carbaldehyde Chemical compound O=CC1=CSC(C=2C=C(OCC=3C=CC=CC=3)C=CC=2)=N1 OEPOKWHJYJXUGD-UHFFFAOYSA-N 0.000 description 1
- ISRGONDNXBCDBM-UHFFFAOYSA-N 2-chlorostyrene Chemical compound ClC1=CC=CC=C1C=C ISRGONDNXBCDBM-UHFFFAOYSA-N 0.000 description 1
- 125000003903 2-propenyl group Chemical group [H]C([*])([H])C([H])=C([H])[H] 0.000 description 1
- JLBJTVDPSNHSKJ-UHFFFAOYSA-N 4-Methylstyrene Chemical compound CC1=CC=C(C=C)C=C1 JLBJTVDPSNHSKJ-UHFFFAOYSA-N 0.000 description 1
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 description 1
- NLHHRLWOUZZQLW-UHFFFAOYSA-N Acrylonitrile Chemical compound C=CC#N NLHHRLWOUZZQLW-UHFFFAOYSA-N 0.000 description 1
- 239000004156 Azodicarbonamide Substances 0.000 description 1
- 239000004604 Blowing Agent Substances 0.000 description 1
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 1
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 1
- VQTUBCCKSQIDNK-UHFFFAOYSA-N Isobutene Chemical group CC(C)=C VQTUBCCKSQIDNK-UHFFFAOYSA-N 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-N Methacrylic acid Chemical compound CC(=C)C(O)=O CERQOIWHTDAKMF-UHFFFAOYSA-N 0.000 description 1
- OFOBLEOULBTSOW-UHFFFAOYSA-N Propanedioic acid Natural products OC(=O)CC(O)=O OFOBLEOULBTSOW-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 150000007513 acids Chemical class 0.000 description 1
- 239000012790 adhesive layer Substances 0.000 description 1
- 125000005250 alkyl acrylate group Chemical group 0.000 description 1
- 150000001408 amides Chemical class 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 235000019399 azodicarbonamide Nutrition 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- CQEYYJKEWSMYFG-UHFFFAOYSA-N butyl acrylate Chemical compound CCCCOC(=O)C=C CQEYYJKEWSMYFG-UHFFFAOYSA-N 0.000 description 1
- 125000000484 butyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 229920002301 cellulose acetate Polymers 0.000 description 1
- YACLQRRMGMJLJV-UHFFFAOYSA-N chloroprene Chemical compound ClC(=C)C=C YACLQRRMGMJLJV-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- LDHQCZJRKDOVOX-NSCUHMNNSA-N crotonic acid Chemical compound C\C=C\C(O)=O LDHQCZJRKDOVOX-NSCUHMNNSA-N 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 125000005442 diisocyanate group Chemical group 0.000 description 1
- MEGHWIAOTJPCHQ-UHFFFAOYSA-N ethenyl butanoate Chemical compound CCCC(=O)OC=C MEGHWIAOTJPCHQ-UHFFFAOYSA-N 0.000 description 1
- UIWXSTHGICQLQT-UHFFFAOYSA-N ethenyl propanoate Chemical compound CCC(=O)OC=C UIWXSTHGICQLQT-UHFFFAOYSA-N 0.000 description 1
- 125000001495 ethyl group Chemical group [H]C([H])([H])C([H])([H])* 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 239000001530 fumaric acid Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- ZEMPKEQAKRGZGQ-XOQCFJPHSA-N glycerol triricinoleate Natural products CCCCCC[C@@H](O)CC=CCCCCCCCC(=O)OC[C@@H](COC(=O)CCCCCCCC=CC[C@@H](O)CCCCCC)OC(=O)CCCCCCCC=CC[C@H](O)CCCCCC ZEMPKEQAKRGZGQ-XOQCFJPHSA-N 0.000 description 1
- 125000003187 heptyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- VZCYOOQTPOCHFL-UPHRSURJSA-N maleic acid Chemical compound OC(=O)\C=C/C(O)=O VZCYOOQTPOCHFL-UPHRSURJSA-N 0.000 description 1
- 239000011976 maleic acid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 125000005394 methallyl group Chemical group 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 description 1
- 239000002366 mineral element Substances 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- BPCNEKWROYSOLT-UHFFFAOYSA-N n-phenylprop-2-enamide Chemical compound C=CC(=O)NC1=CC=CC=C1 BPCNEKWROYSOLT-UHFFFAOYSA-N 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- 125000002524 organometallic group Chemical group 0.000 description 1
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 229940088417 precipitated calcium carbonate Drugs 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- QTECDUFMBMSHKR-UHFFFAOYSA-N prop-2-enyl prop-2-enoate Chemical compound C=CCOC(=O)C=C QTECDUFMBMSHKR-UHFFFAOYSA-N 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- PNXMTCDJUBJHQJ-UHFFFAOYSA-N propyl prop-2-enoate Chemical compound CCCOC(=O)C=C PNXMTCDJUBJHQJ-UHFFFAOYSA-N 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 239000003549 soybean oil Substances 0.000 description 1
- 235000012424 soybean oil Nutrition 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- LDHQCZJRKDOVOX-UHFFFAOYSA-N trans-crotonic acid Natural products CC=CC(O)=O LDHQCZJRKDOVOX-UHFFFAOYSA-N 0.000 description 1
- 229940099259 vaseline Drugs 0.000 description 1
- KOZCZZVUFDCZGG-UHFFFAOYSA-N vinyl benzoate Chemical compound C=COC(=O)C1=CC=CC=C1 KOZCZZVUFDCZGG-UHFFFAOYSA-N 0.000 description 1
- 229920001567 vinyl ester resin Polymers 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
- 239000011800 void material Substances 0.000 description 1
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
- A61F11/10—Protective devices for the ears internal, e.g. earplugs inflatable or expandable
-
- 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
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)
- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Headphones And Earphones (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00192366A US3811437A (en) | 1971-10-26 | 1971-10-26 | Earplugs |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| DE2251774A1 DE2251774A1 (de) | 1973-05-03 |
| DE2251774B2 DE2251774B2 (de) | 1978-10-05 |
| DE2251774C3 true DE2251774C3 (de) | 1980-08-28 |
Family
ID=22709352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2251774A Expired DE2251774C3 (de) | 1971-10-26 | 1972-10-21 | Gehörschutz |
Country Status (13)
| Country | Link |
|---|---|
| US (2) | US3811437A (enExample) |
| JP (1) | JPS5549859B2 (enExample) |
| BE (1) | BE790456A (enExample) |
| CA (2) | CA969481A (enExample) |
| CH (1) | CH558171A (enExample) |
| DE (1) | DE2251774C3 (enExample) |
| FR (1) | FR2158978A5 (enExample) |
| GB (1) | GB1403097A (enExample) |
| HK (1) | HK23080A (enExample) |
| IT (1) | IT975269B (enExample) |
| NL (1) | NL169678C (enExample) |
| SE (2) | SE399640B (enExample) |
| SU (1) | SU648055A3 (enExample) |
Families Citing this family (115)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52168503U (enExample) * | 1976-06-14 | 1977-12-21 | ||
| JPS5338800U (enExample) * | 1976-09-08 | 1978-04-05 | ||
| US4293355A (en) | 1978-04-28 | 1981-10-06 | Cabot Corporation | Method for ultrasonically welding plasticized thermoplastic polymeric foam wares |
| US4193396A (en) * | 1978-04-28 | 1980-03-18 | E-A-R Corporation | Paired earplug construction |
| US4253452A (en) | 1979-05-24 | 1981-03-03 | Specialty Composites Corporation | Ear plug assembly |
| JPS5821275Y2 (ja) * | 1979-06-08 | 1983-05-06 | 株式会社パイロット | 振動ピツクアツプ型イヤ−マイクロホンの感知部 |
| SE443505B (sv) * | 1979-11-05 | 1986-03-03 | E A R Corp | Horselskydd med fjedrande huvudband |
| US4461290A (en) * | 1980-09-08 | 1984-07-24 | Cabot Corporation | Hearing protectors |
| DE3108261C2 (de) * | 1981-03-05 | 1983-03-24 | Rehau Plastiks Ag & Co, 8673 Rehau | Verfahren zur Herstellung von Gehörschutz-Stopfen aus Kunststoffschaum |
| US4434794A (en) | 1981-06-15 | 1984-03-06 | Leight Howard S | Disposable ear plug |
| USD272946S (en) | 1981-08-24 | 1984-03-06 | Tasco Corp. | Ear protector |
| US4622975A (en) | 1982-01-25 | 1986-11-18 | Minnesota Mining And Manufacturing Company | Ear canal electrode |
| US4592370A (en) | 1982-09-27 | 1986-06-03 | Minnesota Mining And Manufacturing Company | Ear canal electrode for auditory testing |
| US4741344A (en) | 1982-09-27 | 1988-05-03 | Nicolet Instrument Corporation | Ear canal electrode |
| US4490857A (en) | 1982-10-12 | 1985-01-01 | Leight Howard S | Band earplug |
| IT1156545B (it) * | 1982-11-08 | 1987-02-04 | Amplisilence Spa | Inserti auricolari fonoassorbenti in materiale polimerico espanso |
| US4582053A (en) | 1984-01-06 | 1986-04-15 | Wilson Garnet J E | Acoustic ear plug |
| US4818320A (en) | 1984-04-04 | 1989-04-04 | Sherwood Medical Company | Nasal cannula harness and method of making the same |
| US4790308A (en) | 1984-04-04 | 1988-12-13 | Sherwood Medical Company | Nasal cannula harness |
| US4579112A (en) * | 1984-05-17 | 1986-04-01 | Scott Robert T | Foam earplug |
| US4609194A (en) * | 1984-05-30 | 1986-09-02 | Krent Edward D | Vibration dampening device for sporting rackets |
| US4776590A (en) * | 1984-05-30 | 1988-10-11 | Krent Edward D | Vibration dampening device for sporting rackets |
| US4677679A (en) * | 1984-07-05 | 1987-06-30 | Killion Mead C | Insert earphones for audiometry |
| US4648398A (en) | 1984-10-31 | 1987-03-10 | Sherwood Medical Company | Nasal cannula |
| US4724922A (en) * | 1986-07-24 | 1988-02-16 | Kalayjian Robert W | Acoustic earpiece |
| US5002151A (en) * | 1986-12-05 | 1991-03-26 | Minnesota Mining And Manufacturing Company | Ear piece having disposable, compressible polymeric foam sleeve |
| US4880076A (en) | 1986-12-05 | 1989-11-14 | Minnesota Mining And Manufacturing Company | Hearing aid ear piece having disposable compressible polymeric foam sleeve |
| US4774938A (en) | 1987-04-09 | 1988-10-04 | Howard S. Leight & Associates, Inc. | Slow recovery earplug with largely impenetrable surface |
| US4852683A (en) | 1988-01-27 | 1989-08-01 | Etymotic Research, Inc. | Earplug with improved audibility |
| DK159190C (da) * | 1988-05-24 | 1991-03-04 | Steen Barbrand Rasmussen | Oereprop til stoejbeskyttet kommunikation mellem brugeren af oereproppen og omgivelserne |
| JPH02108089U (enExample) * | 1989-02-14 | 1990-08-28 | ||
| US4896679A (en) * | 1989-05-22 | 1990-01-30 | St Pierre Carol L | Method and apparatus for the exclusion of sound and water from the auditory canal |
| SE8902802L (sv) * | 1989-08-23 | 1991-02-24 | Alf Ivarsson | Instrument foer infoerande av en sjaelvexpanderande propp i hoerselgaangen foer bullerdaempning |
| DE3929060A1 (de) * | 1989-09-01 | 1991-03-07 | Bobertag Gmbh | Gehoerschutzstoepsel |
| US5044463A (en) * | 1989-11-30 | 1991-09-03 | Cabot Corporation | Molded foam earplug and method for making same |
| CA2064907C (en) * | 1990-06-25 | 1998-10-27 | Ross Gardner Jr. | Hearing protective earplug |
| DK0591197T3 (da) * | 1990-08-20 | 2000-09-25 | Cabot Safety Intermediate Corp | Høreværns-øreprop med alternative isætningsmåder |
| US5188123A (en) * | 1990-08-20 | 1993-02-23 | Cabot Safety Corporation | Hearing protective earplug having alternative modes of insertion |
| US5131411A (en) * | 1990-08-20 | 1992-07-21 | Virginia Polytechnic Institute & State University | Custom-fitting earplug formed in situ using foaming action |
| US5203352A (en) * | 1990-10-16 | 1993-04-20 | Cabot Safety Corporation | Polymeric foam earplug |
| US5153387A (en) * | 1990-12-31 | 1992-10-06 | Syracuse University | Layered earplug |
| US5195539A (en) * | 1992-03-23 | 1993-03-23 | Minnesota Mining And Manufacturing Company | Earplug compression device |
| 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 |
| WO1995009082A1 (en) * | 1993-09-28 | 1995-04-06 | Bradford Industries, Inc. | Sound attenuation composite and method for forming same |
| USD366313S (en) | 1994-07-21 | 1996-01-16 | Krause Ward B | Ear plug |
| USD364455S (en) | 1994-07-21 | 1995-11-21 | Ward Barry Krause | Ear plug |
| USD366696S (en) | 1994-07-21 | 1996-01-30 | Krause Ward B | Ear plug |
| US5483027A (en) * | 1994-08-24 | 1996-01-09 | Krause; Ward B. | Earplug with form-fitting fluid chambers |
| US5609164A (en) * | 1995-10-23 | 1997-03-11 | Minnesota Mining And Manufacturing Company | Method of forming an earplug containment device |
| US5809574A (en) | 1996-08-15 | 1998-09-22 | Cabot Safety Intermediate Corporation | Hearing protection device |
| 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 |
| US6056082A (en) | 1997-05-09 | 2000-05-02 | 3M Innovative Properties Company | Ergonomic banded ear plug |
| TW428184B (en) | 1998-02-19 | 2001-04-01 | Teijin Ltd | Method and apparatus for producing laminated type electronic component |
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| JP1568084S (enExample) * | 2015-12-24 | 2017-01-30 | ||
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Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2262568A (en) * | 1939-10-21 | 1941-11-11 | Kenneth L Wade | Ear protector |
| US2538339A (en) * | 1949-09-15 | 1951-01-16 | Mary J Thomas | Earplug |
| GB733542A (en) * | 1953-10-16 | 1955-07-13 | Gustav Vilhelm Israel Hultgren | Improvements relating to ear protectors |
| US2717596A (en) * | 1954-04-26 | 1955-09-13 | John S Knight | Cushion mounting for mass impedance resonance filter |
| US2824558A (en) * | 1956-05-24 | 1958-02-25 | Mine Safety Appliances Co | Ear plug |
| US3097059A (en) * | 1960-06-23 | 1963-07-09 | Carl G Hoffman | Method for forming ear plugs for supporting hearing and receivers |
| FR1395197A (fr) * | 1964-04-22 | 1965-04-09 | Accessoire protecteur pour applications otorhinologiques | |
| DE1766350C3 (de) * | 1968-05-08 | 1979-03-22 | Klosterfrau Berlin Chemische, Pharmazeutische, Kosmetische Und Diaetetische Erzeugnisse Gmbh, 1000 Berlin | Universeller Lärmschutzpfropfen |
-
1971
- 1971-10-26 US US00192366A patent/US3811437A/en not_active Expired - Lifetime
-
1972
- 1972-10-16 CH CH1512972A patent/CH558171A/xx not_active IP Right Cessation
- 1972-10-17 IT IT70255/72A patent/IT975269B/it active
- 1972-10-21 DE DE2251774A patent/DE2251774C3/de not_active Expired
- 1972-10-23 BE BE790456D patent/BE790456A/xx not_active IP Right Cessation
- 1972-10-24 GB GB4889972A patent/GB1403097A/en not_active Expired
- 1972-10-25 FR FR7237911A patent/FR2158978A5/fr not_active Expired
- 1972-10-25 SE SE7213785A patent/SE399640B/xx unknown
- 1972-10-25 NL NLAANVRAGE7214437,A patent/NL169678C/xx not_active IP Right Cessation
- 1972-10-26 JP JP10759772A patent/JPS5549859B2/ja not_active Expired
- 1972-10-26 CA CA155,091A patent/CA969481A/en not_active Expired
-
1973
- 1973-01-25 SU SU731881316A patent/SU648055A3/ru active
-
1976
- 1976-02-16 SE SE7601690A patent/SE418572B/xx unknown
- 1976-03-12 US US05/666,364 patent/USRE29487E/en not_active Expired - Lifetime
-
1977
- 1977-06-28 CA CA281,496A patent/CA1022470B/xx not_active Expired
-
1980
- 1980-05-01 HK HK230/80A patent/HK23080A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| GB1403097A (en) | 1975-08-13 |
| US3811437A (en) | 1974-05-21 |
| NL169678C (nl) | 1982-08-16 |
| HK23080A (en) | 1980-05-09 |
| SE399640B (sv) | 1978-02-27 |
| SE418572B (sv) | 1981-06-15 |
| CA969481A (en) | 1975-06-17 |
| NL169678B (nl) | 1982-03-16 |
| USRE29487E (en) | 1977-12-06 |
| SE7601690L (sv) | 1976-02-16 |
| JPS4850588A (enExample) | 1973-07-17 |
| FR2158978A5 (enExample) | 1973-06-15 |
| CA1022470B (en) | 1977-12-13 |
| JPS5549859B2 (enExample) | 1980-12-15 |
| NL7214437A (enExample) | 1973-05-01 |
| CH558171A (de) | 1975-01-31 |
| SU648055A3 (ru) | 1979-02-15 |
| BE790456A (fr) | 1973-02-15 |
| IT975269B (it) | 1974-07-20 |
| DE2251774B2 (de) | 1978-10-05 |
| DE2251774A1 (de) | 1973-05-03 |
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