In Jae Kang

US Patent:

6749531, Jun 15, 2004

Filed:

Oct 15, 2002

Appl. No.:

10/271091

Inventors:

In Hwan Kang - Montrose CA

Assignee:

Novastar Technology, Inc. - Los Angeles CA

International Classification:

F16H 910

US Classification:

474160, 474 47

Abstract:

A multi-speed gear system for a chain transmission device of a bicycle is provided. The system includes a disc having a front plate, a rear plate, and a plurality of tooth series concentrically arranged in the disc and a tooth series selector. Each of the tooth series has a plurality of tooth blocks; the front plate of the disc has a plurality of tooth holes; and the rear plate of the disc has a plurality of rear holes. Each of the tooth blocks is either pushed into a corresponding one of the tooth holes or protrude out of the front plate and the tooth series selector selects one of the tooth series to change speed and makes the tooth blocks of the selected tooth series protrude out of the front plate.

US Patent:

60891149, Jul 18, 2000

Filed:

Jul 19, 1999

Appl. No.:

9/356421

Inventors:

In H. Kang - Glendale CA

International Classification:

F16H 310
F16H 334

US Classification:

74349

Abstract:

A multi-speed transmission for bicycles, comprising: a housing including spaced, opposing face plates, each face plate having a pedal shaft opening and a secondary shaft opening; a pedal shaft rotatably disposed within said pedal shaft openings; a secondary shaft disposed within said secondary shaft openings, wherein the secondary shaft is spaced from the pedal shaft and substantially parallel thereto; and a pedal shaft set of gears mounted on the pedal shaft between the face plates, comprising: (1) a first set of pedal shaft gears mounted on the pedal shaft, (2) a second set of pedal shaft gears rotatably mounted on the pedal shaft, and (3) a third set of pedal shaft gears rotatably mounted on the pedal shaft including first means for selective driving engagement with the second set of pedal shaft gears, the third set of pedal shaft gears including a drive gear means.

US Patent:

61860174, Feb 13, 2001

Filed:

Jul 19, 1999

Appl. No.:

9/356422

Inventors:

In H. Kang - Glendale CA
Joong S. Chang - Cypress CA

International Classification:

F16H 310
F16H 334

US Classification:

74349

Abstract:

A multi-speed bicycle transmission having a housing including spaced, opposing face plates, with each face plate having a pedal shaft opening and a secondary shaft opening. A pedal shaft is rotatably disposed within the pedal shaft openings of the face plates, and a secondary shaft is disposed within the secondary shaft openings. As such, the secondary shaft is spaced from, and parallel to, the pedal shaft. A pedal shaft set of gears are mounted on the pedal shaft between the face plates. The pedal shaft set of gears include: (1) a first set of pedal shaft gears mounted on the pedal shaft, (2) a second set of pedal shaft gears rotatably mounted on the pedal shaft, and (3) a third set of pedal shaft gears rotatably mounted on the pedal shaft including first means for selective driving engagement with the second set of pedal shaft gears. The third set of pedal shaft gears including a drive gear means such as a sprocket for engaging a drive chain. A secondary shaft set of gears are mounted on the secondary shaft between the face plates.