Guide pin for disc brake assembly and disc brake assembly...

Brakes – Wheel – Axially movable brake element or housing therefor

Reexamination Certificate

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Reexamination Certificate

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08051958

ABSTRACT:
An improved guide pin structure adapted for use in a vehicle disc brake assembly comprises a first end including a head portion; a second end including an end face and a lead-in zone, the lead-in zone provided with a rounded generally bullet nose shaped radius adapted for insertion into an aperture of a component of the vehicle disc brake assembly; and a center section defining a shank having a slide surface, the center section defining a guide pin axis; wherein the bullet nose shaped radius of the lead-in zone includes an axial offset relative to the end face and a radial offset relative to the slide surface, and wherein the axial offset is larger than the radial offset by a ratio of at least 2 to 1.

REFERENCES:
patent: 2764886 (1956-10-01), Wiesmann
patent: 2940495 (1960-06-01), Wing
patent: 4162721 (1979-07-01), Moriya
patent: RE30255 (1980-04-01), Rath et al.
patent: 4313526 (1982-02-01), Farr
patent: 4471858 (1984-09-01), Kawase
patent: 5323882 (1994-06-01), Waterman et al.
patent: 6062786 (2000-05-01), Garver et al.
patent: 6328515 (2001-12-01), Donovan
patent: 6361258 (2002-03-01), Heesch
patent: 54137573 (1979-10-01), None

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