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Multi lip seal

  • US 4,560,174 A
  • Filed: 12/02/1983
  • Issued: 12/24/1985
  • Est. Priority Date: 12/02/1983
  • Status: Expired due to Term
First Claim
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1. A seal means for a track joint said seal means being adapted to be positioned in a chamber between two coupled mechanical parts rotating about a pin, said parts being movable axially with respect to one another, the pin being connected to one part and rotating within a bushing connected to the other part with pin and bushing, characterized in that the seal means comprises an annular elastic O-ring, and an annular seal ring of "L"-shaped cross section, said seal ring made of relatively stiff material having a hardness on the order of Shore A 93 to 97, said seal ring having a top section with a retainer projection at the extremity remote from the base facing the elastic ring for helping to retain the elastic ring on the seal ring, and having a base with at least two annular seal projections extending therefrom and adapted to engage the bushing for retaining lubricant in the chamber and for preventing dirt from entering the chamber and adversely affecting the operation of the seal means, said elastic O-ring being coupled to said seal ring for urging the seal projections toward the bushing and for maintaining the seal notwithstanding axial displacement of the mechanical parts toward and away from one another.

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