Compression isolator for a suspension damper

Patent metadata

Field	Value
Publication number	US-9784333-B2
Application number	US-201615180250-A
Country	US
Kind code	B2
Filing date	Jun 13, 2016
Priority date	Jan 7, 2009
Publication date	Oct 10, 2017
Grant date	Oct 10, 2017

Abstract

A method and apparatus for a damper. The damper comprises a fluid chamber having a piston dividing the chamber into a compression and rebound sides, a reservoir in fluid communication with the compression side of the chamber, and an isolator disposed between the compression side and the reservoir, whereby the isolator obstructs fluid flow between the compression side and the reservoir. In one embodiment, a bypass provides a fluid path between the compression side and the isolator.

First claim

What we claim is:

1. A vehicle suspension comprising:
a fluid chamber housing, said fluid chamber housing defining a fluid chamber therein, said fluid chamber comprising:
a compression side; and
a rebound side;

a piston disposed within said fluid chamber, said piston dividing said fluid chamber into said compression side and said rebound side, said piston having a first fluid pathway there through to enable fluid travel between said compression side and said rebound side;
a compression isolator disposed within said fluid chamber housing;
a reservoir chamber housing physically distinct from said fluid chamber housing, said reservoir chamber housing defining a reservoir chamber therein, said reservoir chamber fluidly coupled with said fluid chamber, said reservoir chamber housing comprising:
a fluid-fillable portion, said fluid-fillable portion configured to receive fluid from said fluid chamber as a fluid capacity of said compression side of said fluid chamber decreases during a compression stroke; and
a gas pocket;

a floating piston disposed within said reservoir chamber, said floating piston movably sealing said fluid-fillable portion from said gas pocket, said floating piston configured to transfer pressure between fluid in said fluid-fillable portion of said fluid reservoir and said gas pocket; and
a bypass chamber providing a second fluid pathway, alternative to said first fluid pathway, between said compression side and said rebound side, said bypass chamber being in fluid communication with said fluid chamber via a set of ports disposed in said wall of said fluid chamber,
wherein said first fluid pathway comprises a compression pathway portion having a first shim to allow fluid to flow from said compression side to said rebound side but not vice versa,
wherein said first fluid pathway comprises a rebound pathway portion having a second shim to allow fluid to flow from said rebound side to said compression side but not vice versa.

2. The vehicle suspension of claim 1 , wherein said bypass chamber further comprises:
an annular area coaxially disposed around said fluid chamber, said bypass chamber permitting varying amounts of fluid to bypass said first fluid pathway of said piston depending upon a position of said piston in said fluid chamber.

3. The vehicle suspension of claim 1 , further comprising:
a fluid hose having a first end and a second end, said first end of said fluid hose coupled to said reservoir chamber housing and said second end of said fluid hose coupled to said fluid chamber housing such that said fluid hose fluidically couples said reservoir chamber and said fluid chamber.

Assignees

• Fox Factory Inc

Inventors

• Marking John

Classifications

• F16F9/065

  Expansion chamber provided on the upper or lower end of a damper, separately there from or laterally on the damper · CPC title

• F16F9/3235

  of cylinders (F16F9/483 takes precedence) · CPC title

• F16F9/512 Primary

  Means responsive to load action, {i.e. static load} on the damper or {dynamic} fluid pressure {changes} in the damper, {e.g. due to changes in velocity (F16F9/504, F16F9/516 take precedence; non-automatic damper adjustment from a distance using servo control, the servo pressure being created by the flow of damping fluid F16F9/465; self-pumping fluid springs in vehicle suspensions B60G17/044)} · CPC title

• F16F9/48

  Arrangements for providing different damping effects at different parts of the stroke ({F16F9/346, F16F9/516} , F16F9/53 take precedence) · CPC title

• F16F9/346

  Throttling passages in the form of slots arranged in cylinder walls · CPC title