Hearing aid ear piece having disposable compressible polymeric foam sleeve

CAFC
  • US 4,880,076 A
  • Filed: 12/05/1986
  • Issued: 11/14/1989
  • Est. Priority Date: 12/05/1986
  • Status: Expired due to Term
First Claim
Patent Images

1. Hearing aid comprising an ear piece including a sound tube, a user-disposable sleeve which is formed with distal and proximal ends, a central longitudinal passage between said distal and proximal ends having a size approximating that of said sound tube wherein the sleeve has an exterior surface, comprises soft polymeric foam that is highly compressible, has slow, substantially complete recovery, and can be compressed to be freely insertable into an external ear canal of the user and to become wedged in the canal when the foam is allowed to recover, andfastening means for disposably attaching the proximal end of the sleeve to said ear piece with said passage connecting the sound tube to the ear canal of the user, said fastening means providing a Holding Value and a Pullout Value and wherein said Holding Value is at least 11/2 times said Pullout Value.

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