Double tube hydraulic shock absorber

Details Double tube hydraulic shock absorber Double tube hydraulic shock absorber

2006-03-21

2009-11-24

Williams, Thomas J (Department: 3657)

Brakes

Internal-resistance motion retarder

Valve structure or location

C188S313000, C188S315000

Reexamination Certificate

active

07621383

ABSTRACT:
A double tube hydraulic shock absorber comprises: an outer tube; an inner tube; a base valve which is fitted and fixed to a base end of the inner tube; a lower cap provided so as to contact a leg portion of the base valve and seal a base end of the outer tube in an oil tight fashion; a piston rod inserted into the inner tube so as to be capable of an axial reciprocation; and a guide member attached to a top side of the outer tube and the inner tube so as to support the piston rod and apply an axial force on the inner tube. In this double tube hydraulic shock absorber, the leg portion of the base valve and the lower cap contact each other on a line of action of the axial force that is applied toward the base end of the inner tube.

REFERENCES:
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patent: 3874487 (1975-04-01), Keijzer et al.
patent: 4401196 (1983-08-01), Grundei
patent: 4782925 (1988-11-01), Grundei
patent: 5219414 (1993-06-01), Yamaoka
patent: 5638927 (1997-06-01), Cheatham et al.
patent: 6622832 (2003-09-01), Ashiba et al.
patent: 6684990 (2004-02-01), Takakusaki
patent: 1216092 (1999-05-01), None
patent: 2385144 (2000-06-01), None
patent: 11-201211 (1999-07-01), None

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