Invention Grant
US07766143B1 Bicycle rear hub whose freewheel having smaller diameter and specification
失效
自行车后轮毂，其飞轮具有较小的直径和规格
- Patent Title: Bicycle rear hub whose freewheel having smaller diameter and specification
- Patent Title (中): 自行车后轮毂，其飞轮具有较小的直径和规格
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Application No.: US11749228Application Date: 2007-05-16
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Publication No.: US07766143B1Publication Date: 2010-08-03
- Inventor: Ching-Shu Chen
- Applicant: Ching-Shu Chen
- Applicant Address: TW Changhua Hsien
- Assignee: Chosen Co., Ltd.
- Current Assignee: Chosen Co., Ltd.
- Current Assignee Address: TW Changhua Hsien
- Agency: Kamrath & Associates PA
- Agent Alan Kamrath
- Main IPC: B60B27/06
- IPC: B60B27/06
Abstract:
A rear hub for a bicycle includes a mandrel, a hub body, a first locking nut, a freewheel, an auxiliary threaded post, and a second locking nut. The mandrel has a primary threaded section and a secondary mounting portion which has a diameter smaller than that of the primary mounting portion. Thus, the secondary mounting portion of the mandrel has a smaller diameter so that the freewheel has a smaller diameter to reduce the tooth number of the driven gear to reduce the tooth number of the chainwheel to reduce the diameter of the chainwheel so as to reduce the whole volume and weight of the bicycle.
Information query
