Earplug with insertion stem

Details Earplug with insertion stem Earplug with insertion stem

1998-05-08

1999-12-28

Dang, Khanh

Acoustics

Anatomic or prosthetic relation

Ear and mouth

128864, A61B 702

Patent

active

060068574

ABSTRACT:
An earplug is provided, of a type that includes a soft shell (12) and an insertion stem (16), which facilitates pullout of the earplug from the ear canal and which has an increased ability to block noise. The earplug includes a body or shell of soft elastomeric material with a forward portion (20) constructed to enter the ear canal and a rearward portion (22) which flares in a rearward direction. A stem (16) of more rigid material than the shell, extends along most of the length of a passage (14) formed within the shell. The shell passage has a neck part (42) at the rear of the shell forward portion. The stem has a forward flange (32) lying in interference fit within the passage at a location forward of the passage neck part, and the stem has a rearward flange (34) that lies in interference fit with the flared rear portion of the shell.

REFERENCES:
patent: 4434794 (1984-03-01), Leight
patent: 5249309 (1993-10-01), Berg et al.
patent: 5792998 (1998-08-01), Gardner, Jr. et al.

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