[특허]Bicycle suspension assembly with inertia valve and blow-off

[미국특허] Bicycle suspension assembly with inertia valve and blow-off 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	B62K-025/10 B62K-025/06 F16F-009/504 F16F-009/50
출원번호	US-0750931 (2007-05-18)
등록번호	US-7506884 (2009-03-24)
발명자 / 주소	Fox,Robert C.
출원인 / 주소	Fox Factory, Inc.
대리인 / 주소	Patterson & Sheridan, L.L.P.
인용정보	피인용 횟수 : 14 인용 특허 : 85

초록

A bicycle suspension assembly having an inertia valve is described. A blow-off valve that permits fluid flow through the suspension assembly when the fluid pressure in the suspension assembly exceeds a predetermined threshold may be included.

대표청구항 ▼

That which is claimed: 1. A bicycle, comprising: a frame; a pedal crank assembly coupled to the frame and configured to be driven by rider-induced pedaling forces; a wheel, and a suspension assembly operably interposed between the frame and the wheel, the suspension assembly comprising: a damper, the damper comprising a damper tube containing damping fluid and a piston rod supporting a piston in sliding engagement with the damper tube, the piston and the damper tube at least partially defining a compression chamber of the damper, wherein the piston rod occupies an increasing volume of the damper tube during compression movement of the suspension assembly, the damper additionally comprising an inertia valve including an inertia mass, the inertia mass normally biased to a closed position wherein the inertia mass is adjacent an opening to the compression chamber such that fluid flow through the opening is inhibited, and the inertia mass is movable to an open position wherein the inertia mass is not adjacent the opening such that fluid flow through the opening is not inhibited and the inertia mass having a passage formed therethrough; a spring configured to apply a force to the suspension assembly tending to extend the piston rod relative to the damper tube; wherein the inertia valve is configured such that the inertia mass remains in the closed position in response to the rider-induced pedaling forces applied to the frame and wherein the inertia valve is configured such that the inertia mass moves toward the open position in response to a terrain-induced force above a predetermined threshold applied to the wheel; a blow-off valve configured to substantially inhibit fluid flow from the damper tube through the blow-off valve in response to a fluid pressure in the damper tube below a predetermined pressure threshold, and to permit fluid flow from the damper tube through the blow-off valve in response to a fluid pressure in the damper tube above the predetermined pressure threshold; wherein the predetermined pressure threshold is configured to be above a level induced by the rider pedaling forces applied to the frame; a reservoir chamber configured to accommodate fluid displaced by the increasing volume of the piston rod during a compression movement of the suspension assembly, wherein the damper additionally comprises a check valve configured to allow fluid flow from the inertia mass passage to the reservoir chamber and restrict fluid flow from the reservoir chamber to the inertia mass passage; and a pocket configured to receive the inertia mass in the open position, wherein a clearance is defined between the inertia mass and the pocket and the clearance is configured to provide restricted fluid communication between the reservoir chamber and the pocket. 2. The bicycle of claim 1 wherein the damper further includes a separating barrier, movable in response to the fluid displaced, separating the reservoir chamber from a gas chamber. 3. The bicycle of claim 2 wherein the separating barrier is a floating piston. 4. The bicycle of claim 1 wherein the spring comprises a gas spring containing pressurized gas. 5. The bicycle of claim 1 wherein the piston includes at least one fluid flow passage. 6. The bicycle of claim 1 wherein the inertia valve further comprises a valve shaft, surrounded by the inertia mass and guiding sliding motion of the inertia mass, the valve shaft defining at least a portion of a fluid flow path from the compression chamber to the opening. 7. The bicycle of claim 6 wherein the valve shaft defines the opening. 8. The bicycle of claim 7 wherein, with the inertia mass in the open position, fluid displaced by the increasing volume of the piston rod during a compression movement of the suspension assembly exits the opening in a direction that is outward and away from the centerline of the valve shaft. 9. The bicycle of claim 1, wherein the inertia valve is not associated with the piston. 10. The bicycle of claim 1, wherein the blow-off valve is not associated with the piston. 11. The bicycle of claim 1, wherein the piston rod is associated with a portion of the damper that is coupled to the frame. 12. The bicycle of claim 1 wherein the predetermined force threshold produces an acceleration of the wheel of between 0.2 G's and 2.0 G's. 13. The bicycle of claim 1 wherein the predetermined force threshold produces an acceleration of the wheel of between 0.3 G's and 1.6 G's. 14. The bicycle of claim 1 wherein the predetermined force threshold produces an acceleration of the wheel of between 0.4 G's and 1.2 G's. 15. The bicycle of claim 1 wherein the damper further comprises an adjustment mechanism associated with the piston rod, the adjustment mechanism permitting external adjustment of a damping characteristic of the damper. 16. The bicycle of claim 15 wherein the externally adjustable damping characteristic is rebound damping. 17. The bicycle of claim 1 wherein the upward location of the inertia mass in the closed position is limited by a stop.

이 특허에 인용된 특허 (85) 인용/피인용 타임라인 분석

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Becker William M., Bicycle suspension system with spring preload adjuster and hydraulic lockout device.
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Turner Paul H. (Boulder CO), Bicycle with a front fork wheel suspension.
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Turner Paul H. (Boulder CO), Bicycle with improved front fork wheel suspension.
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Yoshioka Yuji (Susono JPX) Yamamoto Yukio (Susono JPX) Ogawa Osamu (Mishima JPX) Nakayama Fujio (Susono JPX) Hitani Tomoki (Susono JPX) Kurosawa Ryuichi (Numazu JPX), Damper.
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Kruckemeyer William C. (Xenia OH) Fannin Wayne V. (Xenia OH), Damper with internally powered selective ride valving.
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Robert C. Fox ; John Marking, Damping adjuster for shock absorber.
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Baldomero Ricardo R., Damping cartridge for high performance suspension systems.
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Baldomero Ricardo R., Damping system having separately adjustable damping circuits.
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Chen Tsai-Lie (No. 2 ; Lane 371 ; Hwacheng Rd. Hsin Chuang City ; Taipei Hsien TWX), Delayed-return suspension fork for a bicycle.
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Cowan Arnold A. (Encino CA), Dual damping control valve shock absorber.
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Truchinski Rich (27930 N. Tyler #402 Santa Clarita CA 91351), Exterior adjustable suspension precompression fork cap mechanism for two wheeled vehicles.
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Richardson Donald G. ; Shirley David A., Flow sensitive acceleration sensitive shock absorber with added flow control.
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Richardson Donald G. ; Shirley David A., Flow sensitive, acceleration sensitive shock absorber.
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Berthold Brian D., Hydraulic suspension unit.
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Munoz Carlos H. (Placentia CA), Impact sensitive shock absorber.
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Fox, Robert C., Inertia valve shock absorber.
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Derr Randall L. (Bellbrook OH) Dourson Stephen E. (Dayton OH) Keller ; Jr. Chris F. (Dayton OH) Morgan William S. (Centerville OH), Low level damping valve and method for a semi-active hydraulic damper.
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Boyer Scott M. (Valencia CA) Stewart Gerald M. (Camarillo CA) Van Kampen Mark (Tarzana CA) Allen Kirk (Reseda CA), Method for producing a bicycle fork brake arch and legs assembly.
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Yamaoka Fumiyuki (Kanagawa JPX) Kanari Issei (Kanagawa JPX), Variable damping-characteristics shock absorber with adjustable orifice construction variable of fluid flow restriction.
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이 특허를 인용한 특허 (14) 인용/피인용 타임라인 분석

McAndrews, Michael, Bicycle damping enhancement system.
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McAndrews, Michael, Bicycle damping enhancement system.
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Chamberlain, Jason L., Bicycle frame.
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Chamberlain, Jason L., Bicycle frame.
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Becker, William M.; Fox, Robert C.; Wootten, Dennis K., Suspension damper having inertia valve and user adjustable pressure-relief.
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Achenbach, Martin, Suspension fork.
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Achenbach, Martin; Mueller, Christian, Suspension fork for a bicycle.
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[미국특허] Bicycle suspension assembly with inertia valve and blow-off 원문보기

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[미국특허] Bicycle suspension assembly with inertia valve and blow-off 원문보기

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이 특허에 인용된 특허 (85) 인용/피인용 타임라인 분석

이 특허를 인용한 특허 (14) 인용/피인용 타임라인 분석

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