Crown air volume

Patent metadata

Field	Value
Publication number	US-11718362-B2
Application number	US-202117158837-A
Country	US
Kind code	B2
Filing date	Jan 26, 2021
Priority date	Jan 31, 2020
Publication date	Aug 8, 2023
Grant date	Aug 8, 2023

Abstract

A crown assembly including at least one crown fluid chamber having a first volume, and a fork side opening for fluidly coupling the at least one crown fluid chamber with at least one fluid spring chamber of a fork leg to provide an additional amount of available fluid volume to the at least one fluid spring chamber.

First claim

What we claim is:

1. A crown comprising:
at least one crown fluid chamber comprising:
a first volume;
a fork side opening, said fork side opening for fluidly coupling said at least one crown fluid chamber with at least one fluid spring chamber of a fork leg to provide an additional amount of available fluid volume to said at least one fluid spring chamber; and
a switch coupled with said fork side opening, said switch to open or close said fork side opening to control a fluid flow between said at least one crown fluid chamber and said at least one fluid spring chamber of said fork leg.

2. The crown of claim 1 wherein said switch is an adjustable switch configured to adjustably obstruct a portion of said fork side opening to provide an adjustable flow rate of said fluid flow between said at least one crown fluid chamber and said at least one fluid spring chamber of said fork leg.

3. The crown of claim 1 further comprising:
a volume spacer within said at least one crown fluid chamber, said volume spacer to provide a volume change to said at least one crown fluid chamber.

4. The crown of claim 1 further comprising:
a bladder within said at least one crown fluid chamber, said bladder to provide a volume adjustment capability to said at least one crown fluid chamber; and
a bladder valve, said bladder valve to modify a size of said bladder, said bladder valve accessible via an exterior portion of said crown.

5. The crown of claim 1 further comprising:
an opening alignment mark on said crown, said opening alignment mark to indicate a location of said fork side opening, said opening alignment mark used at a time of manufacture to align said fork side opening with a port fluidly coupled with said at least one fluid spring chamber of said fork leg.

6. The crown of claim 1 further comprising:
a second crown fluid chamber, said second crown fluid chamber distinct from said at least one crown fluid chamber; and
a fluid pathway to fluidly couple said second crown fluid chamber with said at least one crown fluid chamber.

7. The crown of claim 1 wherein the at least one crown fluid chamber further comprises:
a steerer tube side opening, said steerer tube side opening fluidly sealed when a steerer tube is coupled with said crown.

8. The crown of claim 1 wherein the at least one crown fluid chamber further comprises:
a steerer tube side opening, said steerer tube side opening for fluidly coupling said at least one crown fluid chamber with a steerer tube fluid chamber of a steerer tube to provide an additional amount of available fluid volume to said at least one crown fluid chamber.

9. A fork assembly comprising:
a steerer tube;
a crown fixedly coupled with said steerer tube; said crown comprising:
a fork side opening;
a steerer tube side opening;
at least one crown fluid chamber having a first fluid volume; and

at least one fork leg fixedly coupled with said crown, said at least one fork leg comprising:
a lower fork tube and an upper fork tube, said lower fork tube and said upper fork tube telescopically coupled to form a fork fluid chamber having a second fluid volume; and
said upper fork tube having at least one opening therein, said at least one opening to provide access to said fork fluid chamber; and

said fork side opening configured to provide a flow path between said at least one crown fluid chamber and said fork fluid chamber, said fork side opening to establish a third fluid volume available to said fork fluid chamber.

10. The fork assembly of claim 9 further comprising:
a fluid spring operationally contained within said fork fluid chamber; and
at least one hermetic seal at said fork side opening, said at least one hermetic seal to provide a fluid seal between said at least one crown fluid chamber and said at least one opening in said upper fork tube.

11. The fork assembly of claim 9 further comprising:
a switch coupled with said fork side opening, said switch to open or close said fork side opening to control a fluid flow between said at least one crown fluid chamber and said fork fluid chamber, wherein when said switch is closed said fork fluid chamber has said second fluid volume, and when said switch is open said fork fluid chamber has said third fluid volume.

12. The fork assembly of claim 11 wherein said switch is an adjustable switch configured to adjustably obstruct a portion of said fork side opening to provide an adjustable flow rate of said fluid flow between said at least one crown fluid chamber and said fork fluid chamber.

13. The fork assembly of claim 11 wherein said switch is a manual switch.

14. The fork assembly of claim 11 wherein said switch is an electric switch.

15. The fork assembly of claim 9 further comprising:
a volume spacer within said at least one crown fluid chamber, said volume spacer to provide a volume change to said first fluid volume.

16. The fork assembly of claim 9 further comprising:
a bladder within said at least one crown fluid chamber, said bladder to provide a volume adjustment capability of said first fluid volume; and
a bladder valve, said bladder valve to modify a size of said bladder, said bladder valve accessible via an exterior portion of said fork assembly.

17. The fork assembly of claim 9 , further comprising:
a fork side opening alignment mark on said crown, said fork side opening alignment mark indicating a location of said fork side opening; and
a fork fluid chamber alignment mark on said at least one fork leg indicating a location of said at least one opening in said upper fork tube, wherein said fork side opening alignment mark is aligned with said fork fluid chamber alignment mark to obtain a predefined orientation when said at least one fork leg is fixedly coupled with said crown at a time of manufacture.

18. The fork assembly of claim 9 , further comprising:
said crown comprising:
at least a second crown fluid chamber having a fourth fluid volume; and
a fluid pathway to fluidly couple said second crown fluid chamber with said at least one crown fluid chamber to establish a fourth fluid chamber.

19. The fork assembly of claim 9 , wherein said upper fork tube of said at least one fork leg further comprises:
a plurality of different sized openings therein, each of plurality of different sized openings to provide access to said fork fluid chamber,
wherein said upper fork tube is rotatable with respect to said fork side opening to provide a selection of different orifice size options between said at least one crown fluid chamber and said fork fluid chamber, said selection of different orifice size options to provide an adjustable flow rate between said at least one crown fluid chamber and said fork fluid chamber.

Assignees

• Fox Factory Inc

Inventors

• Coaplen Joshua
• Otterness Christopher
• Mccormick Daniel

Classifications

• B62K21/04 Primary

  Fork crowns · CPC title

• B62K25/08

  for front wheel · CPC title

• B62K2025/044

  Suspensions with automatic adjustment · CPC title

• B62K2025/048

  with suspension manual adjustment details · CPC title

• B62K2201/08

  Fluid springs · CPC title