Brakes – Internal-resistance motion retarder – Valve structure or location
Reexamination Certificate
2008-07-08
2008-07-08
Burch, Melody M. (Department: 3683)
Brakes
Internal-resistance motion retarder
Valve structure or location
C188S313000, C188S316000, C137S614200
Reexamination Certificate
active
07395907
ABSTRACT:
Shock absorber containing a flow channel (16), provided with a valve assembly, made in the piston section. This valve assembly is designed to be actuated hydraulically. To this end there is an auxiliary chamber (22, 42) which on one side is eliminated by a movable valve body (18). This valve body is provided with an inlet for oil from the flow channel to the auxiliary chamber. There is an outlet (21, 41) (that can be closed off). The surface area of the valve body acting on the valve seat (19) is less than the surface area of the valve body in the auxiliary chamber, so that fluid flowing through the inlet of the valve body results in an increase in the volume of the auxiliary chamber and thus in closing movement of the valve body. Because filing of the auxiliary chamber takes some time, a frequenncy-dependend closing characteristic of the flow channel is obtained.
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De Kock Paul
de Ruiter Adrianus Antonius Wilhelmus
Bachman & LaPointe P.C.
Burch Melody M.
Koni B.V.
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