WO2006060085A3 - Dual density earplug - Google Patents

Dual density earplug Download PDF

Info

Publication number
WO2006060085A3
WO2006060085A3 PCT/US2005/038488 US2005038488W WO2006060085A3 WO 2006060085 A3 WO2006060085 A3 WO 2006060085A3 US 2005038488 W US2005038488 W US 2005038488W WO 2006060085 A3 WO2006060085 A3 WO 2006060085A3
Authority
WO
WIPO (PCT)
Prior art keywords
stiffener
earplug
cavity
stem
foam
Prior art date
Application number
PCT/US2005/038488
Other languages
French (fr)
Other versions
WO2006060085A2 (en
Inventor
Edwin Woo
John Allen Jenkins Jr
Original Assignee
Howard Leight Ind Llc
Edwin Woo
John Allen Jenkins Jr
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Howard Leight Ind Llc, Edwin Woo, John Allen Jenkins Jr filed Critical Howard Leight Ind Llc
Priority to EP05821216.8A priority Critical patent/EP1816993B1/en
Publication of WO2006060085A2 publication Critical patent/WO2006060085A2/en
Publication of WO2006060085A3 publication Critical patent/WO2006060085A3/en

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

Abstract

An earplug (10) that includes a soft foam body (12) and a stiffener (14) in the body, is produced by a method that has minimum steps and that results in an earplug of attractive design and that uses a minimum of material. One method includes molding an earplug body in a body cavity (52) while a mandrel (56) lies in the body cavity. After the foam material in the body cavity has at least partially solidified, the mandrel is removed, leaving an empty stiffener cavity (60) in the foam body (12). With the body remaining in the body mold (54), flowable stiffener material (14A) is poured into the stiffener cavity of the body and allowed to solidify, to produce an earplug with a molded-in stiffener (14). Another method, results in an earplug (90) with a stem (95) having a rearwardly-projecting stem portion (96). This method includes molding a stem rear portion (96) in a stiffener cavity (110) while allowing stiffener material to project forward of the rear portion to form a stem free front portion (120). The free front portion is projected into a body cavity (104) while foam material in the body cavity is still plastically deformable.
PCT/US2005/038488 2004-12-01 2005-10-25 Dual density earplug WO2006060085A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05821216.8A EP1816993B1 (en) 2004-12-01 2005-10-25 Dual density earplug

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/000,649 2004-12-01
US11/000,649 US7220372B2 (en) 2004-12-01 2004-12-01 Dual density earplug

Publications (2)

Publication Number Publication Date
WO2006060085A2 WO2006060085A2 (en) 2006-06-08
WO2006060085A3 true WO2006060085A3 (en) 2006-10-26

Family

ID=36565483

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2005/038488 WO2006060085A2 (en) 2004-12-01 2005-10-25 Dual density earplug

Country Status (3)

Country Link
US (1) US7220372B2 (en)
EP (1) EP1816993B1 (en)
WO (1) WO2006060085A2 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1680041A4 (en) * 2003-09-12 2007-05-23 Howard Leight Ind Llc Earplug with bendable stiffener
US7266922B2 (en) * 2005-03-18 2007-09-11 Mann's Bait Company Fishing lures having elastomeric portions
US7984716B2 (en) * 2007-06-22 2011-07-26 Kimberly-Clark Worldwide Inc. Self-conforming sound attenuation earplug
US8113207B2 (en) * 2008-08-22 2012-02-14 Kimberly-Clark Worldwide, Inc. Self-conforming sound attenuation earplug
KR100974152B1 (en) * 2010-03-15 2010-08-04 구자헌 Non-adhensive anti-noise earplug and method for fabricating the same
US8870558B2 (en) * 2011-07-06 2014-10-28 Daniel R. Schumaier Earplug shaper having curved shaping surfaces
US8679607B2 (en) 2012-07-12 2014-03-25 3M Innovative Properties Company Foamable article
US8968613B2 (en) 2012-07-12 2015-03-03 3M Innovative Properties Company Method of making an earplug
US9737439B2 (en) 2012-07-12 2017-08-22 3M Innovative Properties Company Push-in earplug
CN110087594B (en) 2016-12-21 2022-04-29 3M创新有限公司 Earplug with stem including sleeve
BR112022005619A2 (en) 2019-09-27 2022-07-12 3M Innovative Properties Co INSERTION EAR PROTECTOR AND METHOD FOR MANUFACTURING IT WITH THE USE OF A CHUCK

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4434794A (en) 1981-06-15 1984-03-06 Leight Howard S Disposable ear plug
US4774938A (en) 1987-04-09 1988-10-04 Howard S. Leight & Associates, Inc. Slow recovery earplug with largely impenetrable surface
US5044463A (en) * 1989-11-30 1991-09-03 Cabot Corporation Molded foam earplug and method for making same
US5188123A (en) 1990-08-20 1993-02-23 Cabot Safety Corporation Hearing protective earplug having alternative modes of insertion
US5573015A (en) 1995-03-28 1996-11-12 Williams; Colin D. Extruded ear plug
SE513688C2 (en) 1996-12-12 2000-10-23 Dalloz Safety Ab Earplug, method of manufacturing an integrated earplug and use of multi-material injection molding to provide such an earplug
SE527853C2 (en) * 2000-04-06 2006-06-20 Bacou Dalloz Ab Noise-canceling earplug, diaphragm elements located in the earplug's passage, ways of manufacturing said earplug and ways of affecting the progression of the earplug's suppression curve
US20020124851A1 (en) 2000-11-28 2002-09-12 Richard Knauer Hearing protective device and method of making same
US6981504B2 (en) * 2003-08-21 2006-01-03 Bacou-Dalloz Usa Safety, Inc. Core stiffened earplug

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
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

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP1816993A4 *

Also Published As

Publication number Publication date
EP1816993B1 (en) 2013-05-08
WO2006060085A2 (en) 2006-06-08
US7220372B2 (en) 2007-05-22
US20060118124A1 (en) 2006-06-08
EP1816993A4 (en) 2011-11-30
EP1816993A2 (en) 2007-08-15

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