In abstract, a preferred embodiment of this invention is a shift system for bicycle type chain drives, including noncable linkages for positive movement in both directions. The hand manipulated controls are conveniently located on the upper portion of the velocipede and are designed for simplicity and smooth operation.
申请公布号
US4116079(A)
申请公布日期
1978.09.26
申请号
US19760731852
申请日期
1976.10.12
申请人
PEARCE, JAMES D.;PEARCE, STANLEY E.;PEARCE, D. KEVIN
发明人
PEARCE, JAMES D.;PEARCE, STANLEY E.;PEARCE, D. KEVIN