Hydro-mechanical stop for a shock absorber
AssigneeFord Motor Company
InventorNorman G. Fouts
Life of this patent
Estimating the term…
Abstract
A hydro-mechanical compression and rebound stop 22 for a suspension strut 10 in which a tubular sleeve 30 is coaxially mounted about a piston rod 18 and is positioned by a coil spring 26 which has its other end seated against a fixed annular seat 24. An abutment ring 50 engages the bottom end of the sleeve 30 to force the sleeve through the annular seat 24 against the bias of the spring and to cause a hydraulic restricted hydraulic flow therethrough. Upon rebound, the abutment ring 50 compresses an elastomeric sleeve 48 against a rod guide 43 at the top end of the working cylinder 12.
Claims20
A hydraulic shock absorber characterized by:
- a working cylinder;
- a piston rod and a piston mounted thereon sized to be slideably received within said working cylinder and dividing said cylinder into jounce and rebound chambers;
- an end closure closng one end of said working cylinder and having an opening to slideably receive said piston rod;
- said piston having flow control means constructed to provide a restrictive fluid passage for the controlled flow of hydraulic fluid from one of said chambers to the other of said chambers when said piston is moved in said working cylinder to thereby create a dampening force;
- an annular member coaxially mounted about said piston rod within said working cylinder;
- said annular member having a flow control means constructed to provide a restricted fluid passage for the controlled flow of hydraulic fluid therethrough;
- said annular member, working cylinder and said end closure defining an annular variable size compression stop chamber above said rebound chamber;
- and
- said piston rod having means constructed to axially move said annular member within said working cylinder after a predetermined amount of compression stroke of said piston to increase the volume of said compression stop chamber and to provide hydraulic fluid to flow through the flow control means of said annular member to said compression stop chamber to create a dampening force near the compression end of the piston stroke.
A hydraulic shock absorber characterized by:
- a working cylinder;
- a piston rod and piston mounted thereon sized to be slideably received within said working cylinder and dividing said cylinder into jounce and rebound chambers with said jounce chamber defined below said piston and said rebound chamber defined above said piston;
- said piston having fluid flow control means constructed to provide a restrictive fluid passage for the control of hydraulic fluid from one of said chambers when said piston is moved between said chambers to create a dampening force;
- a moveable member mounted above said piston with said moveable member defining, in part, a compression stop chamber;
- said moveable member having fluid flow control means constructed to provide a restricted fluid passage for the control of hydraulic fluid therethrough;
- and
- said piston rod having a means constructed to axially move said movable member only after a predetermined amount of compression stroke of said piston to provide hydraulic fluid to flow through the flow control means of said movable member to create dampening force near compression end of the piston stroke.
Dependencies are inferred from the claim text.