Cycle rear suspension system
US5226674A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1991 |
| Grant date | Jul 13, 1993 |
| Priority date | — |
| Expiry date | Sep 20, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62K25/04
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rear suspension system for a two wheel cycle such as a bicycle or motorcycle having a main frame which includes a rearwardly or downwardly inclined down tube. A vertically pivotable rear frame assembly includes a pair of swing arms which extend rearwardly from pivotal connections on the main frame. Rear wheel fitments are carried by the swing arms. A pair of elongated tubelike or rodlike chain stays extend forwardly from the rear fitments at a fixed angle relative to the swing arms. A tubular shock absorber assembly is supported on the down tube and has a spring urging a coupler portion thereof in a forward and upward direction. A double-pivoted link is pivotally connected between the forward ends of the chain stays and a bell crank assembly which is pivotally connected to the underside of the frame, and in turn, connects the double-pivoted link to the coupler portion of the shock absorber assembly. Upward impacts on the rear wheel are reacted on the main frame as a downward and rearward force with a largely downward force component so pitching motion at the rear end of the main frame is minimized when moving over ground or highway irregularities or rough terrain encountered in o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.