公开(公告)号：US20200297539A1

公开(公告)日：2020-09-24

申请号：US16088474

申请日：2017-03-31

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Feng Cai ,  Jeffrey L. Hamer

IPC: A61F11/08 ,  B65D85/04 ,  H04R1/10

Abstract: Various embodiments of a hearing protection device and a method of forming such device are disclosed. The hearing protection device includes a first hearing protector, a second hearing protector, and an elongated connector including a first end that is connected to the first hearing protector and a second end that is connected to the second hearing protector. The device further includes a frangible attachment element disposed between a first portion of the elongated connector and a second portion of the elongated connector that temporarily connects the first portion to the second portion such that the elongated connector is in a compact configuration. The elongated connector is adapted to be disposed in an elongated configuration when the frangible attachment element is broken.

公开(公告)号：US11076995B2

公开(公告)日：2021-08-03

申请号：US16643153

申请日：2018-08-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James D. Brown ,  Feng Cai ,  Robert C. Coffin

IPC: B29C55/00 ,  B29K23/00 ,  B29L31/00 ,  A61F11/12

Abstract: An earplug assembly and method of forming the same is described. The method includes uniaxially stretching a cord formed of copolymer including ethylene segments and vinyl acetate segments to form a cold-drawn cord. The cold drawn cord has an elongation to break of 250% or less. The method then includes fixing the cold drawn cord to an earplug.

公开(公告)号：US20210322224A1

公开(公告)日：2021-10-21

申请号：US17304854

申请日：2021-06-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James D. Brown ,  Feng Cai ,  Robert C. Coffin

IPC: A61F11/12 ,  B29C55/00

Abstract: An earplug assembly that includes an earplug. The assembly also includes a flexible cord extending from a first cord end to a second cord end and the first cord end fixed to the earplug, the flexible cord formed of copolymer comprising ethylene segments and vinyl acetate segments. The flexible cord has an elastic modulus of 10 MPa or greater at 100% elongation.

公开(公告)号：US20200179173A1

公开(公告)日：2020-06-11

申请号：US16643153

申请日：2018-08-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James D. Brown ,  Feng Cai ,  Robert C. Coffin

IPC: A61F11/12 ,  B29C55/00

Abstract: An earplug assembly and method of forming the same is described. The method includes uniaxially stretching a cord formed of copolymer including ethylene segments and vinyl acetate segments to form a cold-drawn cord. The cold drawn cord has an elongation to break of 250% or less. The method then includes fixing the cold drawn cord to an earplug.

公开(公告)号：US11937998B2

公开(公告)日：2024-03-26

申请号：US16088474

申请日：2017-03-31

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Feng Cai ,  Jeffrey L. Hamer

IPC: A61F11/08 ,  B65D85/04 ,  H04R1/10

CPC classification number: A61F11/08 ,  B65D85/04 ,  H04R1/1033 ,  A61F2210/0071 ,  A61F2220/005 ,  A61F2250/0071

Abstract: Various embodiments of a hearing protection device and a method of forming such device are disclosed. The hearing protection device includes a first hearing protector, a second hearing protector, and an elongated connector including a first end that is connected to the first hearing protector and a second end that is connected to the second hearing protector. The device further includes a frangible attachment element disposed between a first portion of the elongated connector and a second portion of the elongated connector that temporarily connects the first portion to the second portion such that the elongated connector is in a compact configuration. The elongated connector is adapted to be disposed in an elongated configuration when the frangible attachment element is broken.