Brakes – Internal-resistance motion retarder – Relative speed of thrust member or fluid flow
Reexamination Certificate
2011-06-07
2011-06-07
Williams, Thomas J (Department: 3657)
Brakes
Internal-resistance motion retarder
Relative speed of thrust member or fluid flow
C188S282100, C188S282500, C188S322130, C188S313000, C188S317000, C188S282800
Reexamination Certificate
active
07954609
ABSTRACT:
A damping valve (10) resists a flow of fluid from a first fluid chamber (41) to a second fluid chamber (42) which are separated by a piston (1). A partitioning member (24, 27-29, 52) partitions an inflow space (A, B) of a passage (2) in the first fluid chamber (41). A spool (17, 31, 51) decreases a flow cross-sectional area of a flow path from the first fluid chamber (41) into the inflow space (A, B) according to a differential pressure between the fluid chambers. By ensuring a gap between the outer circumference of the valve disk (1) and the partitioning member (24, 27-29, 52) which permanently allows fluid to flow from the first chamber (41) into the inflow space (A, B), the damping force characteristic in a high speed region of piston displacement can be set independently of the damping force characteristic in other regions.
REFERENCES:
patent: 7699148 (2010-04-01), Forster
patent: 2009/0065315 (2009-03-01), Chikamatsu
patent: 10041199 (2001-11-01), None
patent: 102004050732 (2005-06-01), None
patent: 09-291961 (1997-11-01), None
Chikamatsu Satoshi
Watanabe Kouichi
Kayaba Industry Co. Ltd.
Rabin & Berdo PC
Williams Thomas J
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