# US 9,039,024 B1 · Bicycle seatpost

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- Number: US 9,039,024 B1
- Document ID: US9039024B1
- Status: Granted
- Kind: B1
- Application number: 14/219,005
- Filed: 2014-03-19
- Granted: 2015-05-26
- Earliest claimed: 2014-03-19
- Assignees: Giant Manufacturing Co., Ltd.
- Applicants: Giant Manufacturing Co., Ltd.
- Inventors: Hui-Yuan Su; Owen Chang; Che-Wei Hsu
- Web page: https://patentgrep.com/patent/US9039024B1

## CPC

- B62J 1/08: Frames for saddles; Connections between saddle frames and seat pillars; Seat pillars (attaching seat pillars to cycle frames B62K19/36)
- B62J: CYCLE SADDLES OR SEATS; AUXILIARY DEVICES OR ACCESSORIES SPECIALLY ADAPTED TO CYCLES AND NOT OTHERWISE PROVIDED FOR, e.g. ARTICLE CARRIERS OR CYCLE PROTECTORS

## Abstract

A bicycle seatpost includes a first part and a second part. A curvature radius of the first part is r1, and an arc length of the first part is equal to or greater than πr1 and smaller than 2πr1, the first part is set toward a head of a bicycle. The second part is connected to the first part, wherein a curvature radius of the second part is greater than the curvature radius of the first part, the second part is set toward an end of the bicycle.

## Claims

### Claim 1

A bicycle seatpost, comprising:
a first part, wherein a curvature radius of the first part is r1, and an arc length of the first part is equal to or greater than πr1 and smaller than 2πr1, the first part is set toward a head of a bicycle; and
a second part connected to the first part, wherein a curvature radius of the second part is greater than the curvature radius of the first part, the second part is set toward an end of the bicycle.

### Claim 2 (depends on 1)

The bicycle seatpost of claim 1, wherein an angle between an extending direction of the bicycle seatpost and a horizontal direction is greater than 0 degrees and less than 90 degrees.

### Claim 3 (depends on 1)

The bicycle seatpost of claim 1, wherein an axial line of the bicycle seatpost which is parallel to a travel direction of the bicycle is shorter than an axial line of the bicycle seatpost which is perpendicular to the travel direction of the bicycle.

### Claim 4

A bicycle seatpost, comprising
a first tube wall, wherein a curvature radius of the first tube wall is r1; and
a second tube wall, comprising
a forced part connected to two ends of the first tube wall, wherein
a curvature radius of the forced part is r2, and r2>r1;
wherein an axial line of the bicycle seatpost which is parallel to a travel direction of a bicycle is shorter than an axial line of the bicycle seatpost which is perpendicular to the travel direction of the bicycle.

### Claim 5 (depends on 4)

The bicycle seatpost of claim 4, wherein the first tube wall is a semi-circle structure.

### Claim 6 (depends on 4)

The bicycle seatpost of claim 4, wherein the second tube wall comprises two arc parts, each arc part is connected each end of the first tube wall and the forced part, wherein a curvature radius of each of the arc parts is r1.

### Claim 7 (depends on 4)

The bicycle seatpost of claim 4, wherein an extending direction from one end to the other end of the first tube wall is perpendicular to a travel direction of a bicycle.

### Claim 8 (depends on 4)

The bicycle seatpost of claim 4, wherein an extending direction of a minimum distance between the forced part and a midpoint of the first tube wall is paralleled to a travel direction of a bicycle.

### Claim 9 (depends on 4)

The bicycle seatpost of claim 4, wherein an angle between a extending direction of the bicycle seatpost and a horizontal direction is greater than 0 degrees and less than 90 degrees.

### Claim 10 (depends on 4)

The bicycle seatpost of claim 4, wherein a minimum distance between the forced part and a midpoint between the two ends of the first tube wall is d2, the curvature radius of the first tube wall is r1, and d2+r1<2 r1.