Control valve for shock absorber pistons and the like
First Claim
1. A piston rebound control valve for controlling the flow of liquid through a rebound passageway in a piston housing comprising:
- a flexible valve disc covering said passageway;
a valve seat abutting said valve disc when said disc is in a seated position thereagainst;
a biasing means for resiliently biasing said valve seat against said valve disc;
said valve seat having a debossed section spaced away from said seated valve disc when said disc is in its seated position;
said valve disc constructed to flex toward said debossed section of said valve seat in response to a predetermined pressure in said passageway to provide initial flow from said passageway by said valve disc, said predetermined pressure being less than the pressure needed to lift said valve seat against its biasing means.
1 Assignment
0 Petitions
Accused Products
Abstract
A dual action piston assembly 10 includes a piston 12 with compression passageways 18 and rebound passageways 20 with each set of passageways covered by a valve disc 22 and 24 respectively. Each valve disc is seated on a land by a spring biased valve seat 26 and 28 respectively. The rebound valve seat 28 has a debossed section 34 which is spaced away from the valve disc 24 to form a clearance 36 such that when fluid pressure within rebound passageway 20 presses against valve disc 24, the valve disc portion under the debossed section 34 flexes to modulate fluid flow before the valve seat 28 lifts from a higher pressure within the rebound passageway against a spring 42 to allow for smooth modulation of hydraulic fluid passing therethrough.
48 Citations
6 Claims
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1. A piston rebound control valve for controlling the flow of liquid through a rebound passageway in a piston housing comprising:
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a flexible valve disc covering said passageway; a valve seat abutting said valve disc when said disc is in a seated position thereagainst; a biasing means for resiliently biasing said valve seat against said valve disc; said valve seat having a debossed section spaced away from said seated valve disc when said disc is in its seated position; said valve disc constructed to flex toward said debossed section of said valve seat in response to a predetermined pressure in said passageway to provide initial flow from said passageway by said valve disc, said predetermined pressure being less than the pressure needed to lift said valve seat against its biasing means. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification