Title:
四輪自転車の増速装置
Document Type and Number:
Japanese Patent JP4672782
Kind Code:
B2
Abstract:
Disclosed therein is an overdrive system for a four-wheel bicycle, which can get an increase in speed through combination of a plurality of sprockets and ratchet wheels, and which can drive with a small power when a user steps on a pedal of a drive lever using the principle of a lever as overdrive generating means. The overdrive system is very economic since it can load heavy goods thereon with small expenses or accommodate many people thereon, and allows the user to rapidly drive the bicycle with a small power through an organic combination of a plurality of sprockets and wheels using the principle of a lever.
Inventors:
Zhang Yan
Application Number:
JP2009099722A
Publication Date:
April 20, 2011
Filing Date:
April 16, 2009
Export Citation:
Assignee:
Zhang Yan
International Classes:
B60K17/04; B62M1/24; B62M3/08; F16D41/02; F16H7/06; F16H19/04
Domestic Patent References:
| JP3077736U | ||||
| JP1115793A | ||||
| JP2003237676A | ||||
| JP7013688U | ||||
| JP7089476A |
Foreign References:
| KR100656811B1 |
Attorney, Agent or Firm:
IPD International Patent Business Corporation