Bicycle fork having lock-out, blow-off, and adjustable blow-off threshold

• US 10,337,584 B2
• Filed: 01/27/2017
• Issued: 07/02/2019
• Est. Priority Date: 07/02/2001
• Status: Active Grant

• Current Assignee: Fox Factory Incorporated
• Original Assignee: Fox Factory Incorporated
• Inventors: Becker, William M., Lampman, Brian
• Primary Examiner(s): Siconolfi, Robert A.
• Assistant Examiner(s): Aung, San M
• Application Number:
  US15/418,515
• Publication Number:
  US 20170159741A1
• Time in Patent Office: 886 Days
• Field of Search: 188313, 188314, 188316, 188317, 18832213, 188217, 188281, 1882821, 1882828, 1882829, 188276, 188285, 280267, 280279
• CPC Class Codes: B60G 17/08 Characteristics of fluid dampers adjusting fluid dampers in general F16F9/44 - F16F9/53
• CPC Class Codes: B62K 2025/047 with suspension locking means
• CPC Class Codes: B62K 2025/048 with suspension manual adjustment details
• CPC Class Codes: B62K 25/06 with telescopic fork, e.g. including auxiliary rocking arms
• CPC Class Codes: B62K 25/08 for front wheel
• CPC Class Codes: B62K 25/286 the shock absorber being connected to the chain-stay via a linkage mechanism
• CPC Class Codes: F16F 13/007 the damper being a fluid damper
• CPC Class Codes: F16F 9/064 Units characterised by the location or shape of the expansion chamber F16F9/068, F16F9/08 take precedence
• CPC Class Codes: F16F 9/3221 of piston rods
• CPC Class Codes: F16F 9/34 Special valve constructions F16F9/44, F16F9/50 take precedence; filtering details F16F9/3285 ; valves in general F16K; Shape or construction of throttling passages
• CPC Class Codes: F16F 9/44 Means on or in the damper for manual or non-automatic adjustment; such means combined with temperature correction F16F9/53, F16F13/26 take precedence; temperature correction only F16F9/52
• CPC Class Codes: F16F 9/56 Means for adjusting the length of, or for locking, the spring or damper, e.g. at the end of the stroke F16F9/50 takes precedence; for telescopic gas springs or dampers F16F9/0245; vehicle suspension locking arrangements B60G17/005

Abstract

A bicycle fork includes a pair of fork leg assemblies, each of the leg assemblies having an upper leg telescopingly engaged with a lower leg. A damping assembly is provided in at least one of the legs. The damping assembly includes lock-out and blow-off compression circuits. These compression circuits are externally adjustable without tools. Furthermore, these two compression circuits may be adjusted independently of each other.

Claims

1. A damper assembly, comprising:

a damper cap assembly closing an upper end of a first member engaged with a second member of said damper assembly, wherein said damper cap assembly comprises;

a rebound adjustment knob;

a damper cap body having a first set of threads;

a compression piston; and

a damper shaft extending vertically downward from said damper cap assembly and supporting said damping assembly on its lower end, wherein said damping assembly is fixed for movement with said first member and comprises a central passage having positioned therein an adjust rod, said adjust rod coupled to said rebound adjustment knob, wherein a first compression chamber is defined between said adjust rod and an inner surface of said damper shaft; and

a shaft support coupling said damper cap body and said damper shaft, wherein, said shaft support having a second set of threads for mating with said first set of threads, wherein upon said mating, said compression piston being secured between said damper cap body and said shaft support, wherein said shaft support comprises;

a set of ports enabling fluid communication with at least said first compression chamber;

a shoulder axially spacing said compression piston from said cap body, said shoulder comprising;

a set of passages enabling fluid communication with at least a second compression chamber that is created, by said axially spacing, between an upper surface of said compression piston and a lower surface of said cap body; and

a transfer chamber coupling said set of ports to said set of passages, said transfer chamber enabling said fluid to flow between said first compression chamber and said second compression chamber while allowing a threaded connection between said cap body and said shaft support.