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Boot for constant velocity universal joint

  • US 20020185825A1
  • Filed: 04/05/2002
  • Published: 12/12/2002
  • Est. Priority Date: 04/20/2001
  • Status: Active Grant
First Claim
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1. A boot for a constant velocity universal joint, comprising:

  • a minor-diameter cylindrical member being held to a shaft;

    a major-diameter cylindrical member being separated from the minor-diameter cylindrical member, being disposed coaxially with the minor-diameter cylindrical member and having a diameter larger than that of the minor-diameter cylindrical member; and

    a bellows member connecting the minor-diameter cylindrical member with the major-diameter cylindrical member integrally, being substantially formed as a truncated cone shape, being formed of a thermoplastic elastomer exhibiting a kinetic friction coefficient of less than 0.6 when water intervenes in-between and including crests, in the cross section of the bellows member involving the central axis, the peaks of the crests, excepting the crest neighboring the major-diameter cylindrical member as well as the crest neighboring the minor-diameter cylindrical member, being disposed on an inner diametric side with respect to a line connecting the peak of the crest neighboring the major-diameter cylindrical member with the peak of the crest neighboring the minor-diameter cylindrical member.

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