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Earplug

  • US 4,537,187 A
  • Filed: 10/06/1983
  • Issued: 08/27/1985
  • Est. Priority Date: 10/06/1983
  • Status: Expired due to Term
First Claim
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1. An earplug having thin walls and having an external flange adapted to engage the pinna helix and tragus of the ear and with an inwardly extending conical portion adapted to fit into the concha and outer portion of the auditory canal, terminating in a rectangular knob with a flat substantially solid wall with a small hole in said wall, and with a small flange thereon, said knob sealing off the meatus of the external ear canal without substantially penetrating the external ear canal, said flange anchoring the plug at the entrance of the external ear canal, said plug being made of a soft plastic with a density of less than 1.

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