# US 5,346,236 A · Suspension device for bicycle

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- Number: US 5,346,236 A
- Document ID: US5346236A
- Status: Granted
- Kind: A
- Application number: 08/095,717
- Filed: 1993-07-21
- Granted: 1994-09-13
- Earliest claimed: 1992-07-29
- Assignees: Showa Corporation
- Inventors: Toshio Ohma
- Web page: https://patentgrep.com/patent/US5346236A

## CPC

- B62K 25/08: for front wheel
- B62K: CYCLES; CYCLE FRAMES; CYCLE STEERING DEVICES; RIDER-OPERATED TERMINAL CONTROLS SPECIALLY ADAPTED FOR CYCLES; CYCLE AXLE SUSPENSIONS; CYCLE SIDECARS, FORECARS, OR THE LIKE

## Abstract

In a suspension device 20 for a bicycle, a partitioning member 91 is disposed in a fluid chamber in a fork leg 23 beneath a damping force generating device 24 in the slidable fashion for axial sliding movement of said fork leg 23.

## Claims

### Claim 1

A suspension device for a bicycle comprising:
a pair of left and right side tubes fixed to a steering bracket which is, in turn, rotatably supported at the front portion of the bicycle;
a pair of left and right fork legs coupled with said slide tubes in slidable fashion and adapted to hold a front wheel;
fluid chambers and gas chambers extending over both of said slide tubes and said fork legs;
damping force generating device provided within the fluid chambers between said slide tubes and said fork legs;
the suspension device further comprising:
a partitioning wall member disposed within each fluid chamber in each fork leg at the lower side of each damping force generating device and slidable within an axial direction of each fork leg, said partitioning wall member having partitioning wall member position adjusting means capable of manual position change from the outside.

### Claim 2 (depends on 1)

A suspension device for a bicycle as set forth in claim 1, wherein said partitioning wall member comprises:
an O ring externally fitted thereto;
an adjusting screw which contacts a back side of said wall member;
a female screw portion provided in each fork leg for engagement with said adjusting screw;
an operating portion of said adjusting screw extending outwardly of each fork leg;
said operating portion of said adjusting screw being slidable in the axial direction of each fork leg, and said adjusting screw being adapted to be locked by a lock nut engaging with said adjusting screw.

### Claim 3 (depends on 2)

A suspension device for a bicycle as set forth in claim 2, wherein said operating portion of said adjusting screw is extended into an external recess of each fork leg, said external recess being sealed with a cover for protecting the adjusting screw from dust and dirt.

### Claim 4 (depends on 1)

A suspension device for a bicycle as set forth in claim 1, wherein an operation member of an adjuster extending in the axial direction of each slide tube is provided in a cap of each slide tube as a damping force adjusting means of said damping force generating device.

### Claim 5 (depends on 2)

A suspension device for a bicycle as set forth in claim 2, wherein an operation member of an adjuster extending in the axial direction of said slide tubes is provided in a cap of said slide tubes as a damping force adjusting means of said damping force generating device.

### Claim 6 (depends on 3)

A suspension device for a bicycle as set forth in claim 3, comprising an operation member of an adjuster extending in the axial direction of said slide tubes being provided in a cap of said slide tubes as a damping force adjusting means of said damping force generating device.