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Chain including roller sealing arrangement

  • US 5,222,920 A
  • Filed: 06/05/1992
  • Issued: 06/29/1993
  • Est. Priority Date: 06/05/1992
  • Status: Expired due to Term
First Claim
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1. A chain comprising:

  • a plurality of chain link assemblies and chain pins for articulateably interconnecting adjacent chain link assemblies, each of said chain link assemblies includinga pair of spaced apart sidebars, each of said sidebars including a first end portion and a second end portion offset inwardly with respect to said first end portion, said second end portions of said sidebars fitting between the first end portions of the sidebars of an adjacent chain link assembly, each of said second end portions having an inwardly facing surface, said inwardly facing surfaces of said sidebars being in opposed relation to one another, and each of said inwardly facing surfaces including an annular groove;

    a bushing extending laterally between said inwardly facing surfaces of said sidebars, said bushing including an outer surface and an axially extending bore adapted to receive one of the chain pins, said annular grooves circumscribing said bushing;

    a roller rotatably supported on said outer surface of said bushing and between said inwardly facing surfaces of said sidebars, said roller including opposite end faces, and an inner surface defining an axial bore receiving said bushing, said inner surface of said roller and said outer surface of said bushing defining therebetween a clearance space; and

    a pair of annular seal members for sealing said clearance space, each of said seal members surrounding said bushing and being positioned between one of said end faces of said roller and said inwardly facing surface of one of said sidebars, each of said seal members being seated in one of said annular grooves.

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