Suspension system

Patent metadata

Field	Value
Publication number	US-10180171-B2
Application number	US-201514920175-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Oct 13, 2009
Publication date	Jan 15, 2019
Grant date	Jan 15, 2019

Abstract

A suspension system includes a first suspension member movable relative to a second suspension member, a fluid reservoir having a volume, the volume variable in response to a relative movement between the first and second suspension members, and a fluid flow circuit having a first end in fluidic communication with the fluid reservoir and a second end in fluidic communication with an isolated suspension location, the fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said first and third valves are in parallel with each other and the second valve is in series with each of the first and third valves.

First claim

What we claim is:

1. A suspension system comprising:
a first suspension member movable relative to a second suspension member;
a lock-out valve configured for inhibiting telescopic movement between said first suspension member and said second suspension member;
a fluid reservoir having a volume, said volume variable in response to a relative movement between said first and second suspension members; and
a fluid flow circuit having a first end in fluidic communication with said fluid reservoir and a second end in fluidic communication with an isolated suspension location, said isolated suspension location defined by an outer surface of a cylinder of said suspension system and by an inner surface of flexible tubing disposed within said suspension system, said fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said isolated suspension location comprises:
an inlet in fluidic communication with said second end of said fluid flow circuit;
an end barrier; and
an annular enclosing wall defining an interior fluid pressure cavity between said inlet and said end barrier, said annular enclosing wall comprising:
an inner surface and an outer surface, wherein said inner surface of said annular enclosing wall comprises an outer surface of a cylinder, and wherein said outer surface of said annular enclosing wall comprises a flexible tubing.

2. The suspension system of claim 1 wherein said first valve is an inertia valve.

3. The suspension system of claim 1 wherein said first valve is an inertia valve which includes a boost valve pair.

4. The suspension system of claim 1 wherein said first valve includes a compression chamber having an open position and a closed position, wherein said open position and said closed position are attained in response to a variable pressure imparted on said first valve by a damping fluid.

5. The suspension system of claim 1 wherein said second valve is a damping valve.

6. The suspension system of claim 1 wherein said second valve is a damping valve which includes a one-way shim stack.

7. The suspension system of claim 1 wherein said third valve is a boost valve.

8. The suspension system of claim 1 wherein said third valve is a blow-off valve.

9. The suspension system of claim 1 wherein said first valve and said third valve are in disposed in parallel with each other.

10. The suspension system of claim 1 wherein said second valve is disposed in series with said first valve and said third valve.

11. The suspension system of claim 1 wherein said first valve and said third valve are in disposed in parallel with each other and said second valve is disposed in series with said first valve and said third valve.

12. The suspension system of claim 1 wherein said isolated suspension location is pressurized with gas above atmospheric pressure.

13. The suspension system of claim 1 wherein said isolated suspension location includes a fluid pressure cavity port, said fluid pressure cavity port in fluidic communication with at least one of said first valve, said second valve, and said third valve.

14. The suspension system of claim 1 wherein said flexible tubing is configured for expanding as damping fluid enters said isolated suspension location, said flexible tubing further configured for compressing as said damping fluid exits said isolated suspension location.

15. A suspension system comprising:
a first tube;
a second tube telescopically receiving at least a portion of said first tube;
a lock-out valve configured for inhibiting telescopic movement between said first tube and said second tube;
a cylinder disposed at least partially within at least one of said first tube and said second tube, said cylinder having an inner surface and an outer surface, said inner surface of said cylinder at least partially bounding a fluid reservoir, said fluid reservoir having a volume which is variable in response to a relative movement between said first tube and said second tube;
a flexible tubing coupled with said cylinder;
an isolated suspension location; and
a fluid flow circuit having a first end in fluidic communication with said fluid reservoir and a second end in fluidic communication with said isolated suspension location, said fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said isolated suspension location comprises:
an inlet in fluidic communication with said second end of said fluid flow circuit;
an end barrier; and
an annular enclosing wall defining an interior fluid pressure cavity between said inlet and said end barrier, said annular enclosing wall comprising:
an inner surface and an outer surface, wherein said inner surface of said annular enclosing wall comprises an outer surface of a cylinder, and wherein said outer surface of said annular enclosing wall comprises a flexible tubing.

16. The suspension system of claim 15 wherein said first valve includes a compression chamber having an open position and a closed position, wherein said open position and said closed position are attained in response to a variable pressure imparted on said first valve by a damping fluid.

17. The suspension system of claim 15 wherein said second valve is a damping valve which includes a one-way shim stack.

18. The suspension system of claim 15 wherein said third valve is a boost valve.

19. The suspension system of claim 15 wherein said isolated suspension location includes a fluid pressure cavity port, said fluid pressure cavity port in fluidic communication with at least one of said first valve, said second valve, and said third valve.

20. A suspension system comprising:
a first suspension member movable relative to a second suspension member;
a lock-out valve configured for inhibiting telescopic movement between said first suspension member and said second suspension member;
a fluid reservoir having a volume, said volume variable in response to a relative movement between said first and second suspension members; and
a fluid flow circuit having a first end in fluidic communication with said fluid reservoir and a second end in fluidic communication with an isolated suspension location, said isolated suspension location including flexible tubing configured for expanding as damping fluid enters said isolated suspension location, said flexible tubing further configured for compressing as said damping fluid exits said isolated suspension location, said fluid flow circuit comprising a first valve, a second valve and a third valve, wherein said isolated suspension location comprises:
an inlet in fluidic communication with said second end of said fluid flow circuit;
an end barrier; and
an annular enclosing wall defining an interior fluid pressure cavity between said inlet and said end barrier, said annular enclosing wall comprising:
an inner surface and an outer surface, wherein said inner surface of said annular enclosing wall comprises an outer surface of a cylinder, and wherein said outer surface of said annular enclosing wall comprises a flexible tubing.

21. The suspension system of claim 20 wherein said first valve is an inertia valve.

22. The suspension system of claim 20 wherein said first valve is an inertia valve which includes a boost valve pair.

23. The suspension system of claim 20 wherein said first valve includes a compression chamber having an open position and a closed position, wherein said open position and said closed position are at

Assignees

• Fox Factory Inc

Inventors

• Laird Andrew
• Becker William M

Classifications

• F16F9/18

  with a closed cylinder and a piston separating two or more working spaces therein · CPC title

• F16F9/363

  the guide being mounted between the piston and the sealing, enabling lubrication of the guide · CPC title

• F16F13/002

  comprising at least one fluid spring (F16F13/005, F16F13/02, F16F13/04 take precedence) · CPC title

• F16F9/34 Primary

  Special valve constructions ({F16F9/44, F16F9/50 take precedence; filtering details F16F9/3285} ; valves in general F16K); Shape or construction of throttling passages · CPC title

• F16F13/007

  the damper being a fluid damper · CPC title