Adjustable blow-off suspension

Patent metadata

Field	Value
Publication number	US-11065932-B2
Application number	US-201916251981-A
Country	US
Kind code	B2
Filing date	Jan 18, 2019
Priority date	Jan 9, 2009
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Altering the damping rate of a vehicle suspension damper. A pressure of a damping fluid is exerted against a second valve mechanism connected to the vehicle suspension damper. The pressure of the damping fluid is increased beyond a threshold of the second valve mechanism that is adjustable by an adjustment member. The adjustment member is exposed through a high pressure side of the vehicle suspension damper. The second valve mechanism is then opened.

First claim

What is claimed is:

1. A vehicle suspension damper for providing a variable damping rate comprising:
a main chamber; and
a damper reservoir coupled to said main chamber, said damper reservoir having an upper end and a lower end, said damper reservoir comprising:
a reservoir chamber;
a compressible chamber in communication with said reservoir chamber;
a valve mechanism that opens at a threshold pressure to allow fluid to flow from said main chamber to said reservoir chamber;
an adjustment member coupled with said valve mechanism to selectively vary said threshold pressure, said adjustment member disposed near said upper end of said damper reservoir;
an actuator coupled with said adjustment member; and
a center shaft surrounding said actuator and having a first center shaft end and a second center shaft end opposite said first center shaft end, said first center shaft end being coupled to said fluid inlet and said second center shaft end being coupled to an upper end of a second valve, wherein said center shaft is configured for channeling said fluid from a fluid inlet to an upper end of said second valve.

2. The vehicle suspension damper of claim 1 , wherein said actuator is positioned to be in contact with said valve mechanism.

3. The vehicle suspension damper of claim 1 further comprising:
a nut coupled with said actuator.

4. The vehicle suspension damper of claim 3 further comprising:
a spring interfacing with said nut.

5. The vehicle suspension damper of claim 1 further comprising:
a second valve controlling fluid flow from said main chamber to said damper reservoir, said second valve including an adjuster assembly, wherein at least a portion of said adjuster assembly of said second valve is manually accessible through a high pressure region of said damper reservoir.

6. The vehicle suspension damper of claim 5 wherein said second valve further comprises:
a blow-off valve; and
a valve seat.

7. The vehicle suspension damper of claim 6 , wherein said actuator is configured to be in contact with said blow-off valve of said second valve.

8. The vehicle suspension damper of claim 1 , wherein said valve mechanism comprises:
a first end upon which a fluid flow pressure only acts; and
a second end upon which a pressure from a spring acts, wherein when said fluid flow pressure is greater than said pressure from said spring, a fluid flow through said valve mechanism is permitted.

9. The vehicle suspension damper of claim 5 , wherein said second valve comprises:
a first end upon which a fluid flow pressure acts; and
a second end upon which a pressure from a spring acts, wherein when said fluid flow pressure is greater than said pressure from said spring, a fluid flow through said second valve is permitted.

10. The vehicle suspension damper of claim 1 , wherein said vehicle suspension damper reservoir is remote from and in fluid communication with said main chamber.

11. A vehicle suspension damper for providing a variable damping rate comprising:
a main chamber; and
a damper reservoir coupled to said main chamber, said damper reservoir having an upper end and a lower end, said damper reservoir comprising:
a reservoir chamber;
a compressible chamber in communication with said reservoir chamber;
a valve mechanism that opens at a threshold pressure to allow fluid to flow from said main chamber to said reservoir chamber;
an adjustment member coupled with said valve mechanism to selectively vary said threshold pressure, said adjustment member disposed near said upper end of said damper reservoir;
an actuator coupled with said adjustment member; and
a second valve controlling fluid flow from said main chamber to said damper reservoir, said second valve including an adjuster assembly, wherein at least a portion of said adjuster assembly of said second valve is manually accessible through a high pressure region of said damper reservoir.

12. A vehicle suspension damper for providing a variable damping rate comprising:
a main chamber; and
a damper reservoir coupled to said main chamber, said damper reservoir having an upper end and a lower end, said damper reservoir comprising:
a reservoir chamber;
a compressible chamber in communication with said reservoir chamber;
a valve mechanism that opens at a threshold pressure to allow fluid to flow from said main chamber to said reservoir chamber;
an adjustment member coupled with said valve mechanism to selectively vary said threshold pressure, said adjustment member disposed near said upper end of said damper reservoir;
an actuator coupled with said adjustment member; and
a second valve controlling fluid flow from said main chamber to said damper reservoir, said second valve including an adjuster assembly, wherein at least a portion of said adjuster assembly of said second valve is manually accessible through a high pressure region of said damper reservoir, wherein said second valve further comprises:
a blow-off valve; and
a valve seat.

13. A vehicle suspension damper for providing a variable damping rate comprising:
a main chamber; and
a damper reservoir coupled to said main chamber, said damper reservoir having an upper end and a lower end, said damper reservoir comprising:
a reservoir chamber;
a compressible chamber in communication with said reservoir chamber;
a valve mechanism that opens at a threshold pressure to allow fluid to flow from said main chamber to said reservoir chamber;
an adjustment member coupled with said valve mechanism to selectively vary said threshold pressure, said adjustment member disposed near said upper end of said damper reservoir;
an actuator coupled with said adjustment member; and
a second valve controlling fluid flow from said main chamber to said damper reservoir, said second valve including an adjuster assembly, wherein at least a portion of said adjuster assembly of said second valve is manually accessible through a high pressure region of said damper reservoir, wherein said second valve further comprises:
a blow-off valve; and
a valve seat, wherein said actuator is configured to be in contact with said blow-off valve.

14. A vehicle suspension damper for providing a variable damping rate comprising:
a main chamber; and
a damper reservoir coupled to said main chamber, said damper reservoir having an upper end and a lower end, said damper reservoir comprising:
a reservoir chamber;
a compressible chamber in communication with said reservoir chamber;
a valve mechanism that opens at a threshold pressure to allow fluid to flow from said main chamber to said reservoir chamber;
an adjustment member coupled with said valve mechanism to selectively vary said threshold pressure, said adjustment member disposed near said upper end of said damper reservoir;
an actuator coupled with said adjustment member; and
a second valve controlling fluid flow from said main chamber to said damper reservoir, said second valve including an adjuster assembly, wherein at least a portion of said adjuster assembly of said second valve is manually accessible through a high pressure region of said damper reservoir, wherein said second valve comprises:
a first end upon which a fluid flow pressure acts; and
a second end upon which a pressure from a spring acts, wherein when said fluid flow pressure is greater than said pressure from said spring, a fluid flow through said second valve is permitted.

Assignees

• Fox Factory Inc

Inventors

• Laird Andrew
• Fox Robert C

Classifications

• F16F2228/066

  Variable stiffness · CPC title

• F16F9/065

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

• F16F9/446

  Adjustment of valve bias or pre-stress (F16F9/443 takes precedence) · CPC title

• B60G17/08 Primary

  Characteristics of fluid dampers (adjusting fluid dampers in general F16F9/44 - F16F9/53) · CPC title

• B62K2025/048

  with suspension manual adjustment details · CPC title