Brakes – Internal-resistance motion retarder – Including protective shield for retarder
Patent
1993-07-02
1995-12-05
Graham, Matthew C.
Brakes
Internal-resistance motion retarder
Including protective shield for retarder
277212FB, 280276, F16F 938
Patent
active
054720729
ABSTRACT:
A breathable protective filtering boot structure for a telescoping bicycle fork suspension comprises a generally cylindrical bellows-like rubber-like boot for each of a pair of fork legs which telescope along parallel vertical axes. Each boot is secured at its upper end to a male leg member and depends to form a variable volume boot chamber around the telescoping junction of the male and female leg members. The lower end of the boot has a flat annular shoulder spaced axially from and facing the top end of the female member with a cylindrical skirt depending from the boot shoulder for securing the boot to the upper end of the female leg member. A short portion of the skirt, with vent apertures between the shoulder and the female member facing away from the wheel space of the fork, encircles a small filter confining cavity at the lower end of the boot chamber. The filter cavity contains a replaceable annular porous resilient compressed oil-impregnated filter element which is held compressed axially between the boot shoulder and the top end of the female member and is held compressed radially between the apertured skirt portion and the surface of the male member to keep the vent apertures continuously covered and to wipe off and lubricate the surface of the male member. The velocity of air and liquid moving out through the filter during operation of the suspension keeps the outer filter surfaces at the vent apertures free of contaminants.
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Freudenberg Kenton L.
Freudenberg Maxwell C.
Graham Matthew C.
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