The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 13, 1989
Filed:
Jul. 05, 1988
Sandro Testa, Perarolo, IT;
Campagnolo S.p.A., Vicenza, IT;
Abstract
A rear derailleur for bicycle gears comprises an upper body which can be fixed to the bicycle frame, a lower body carrying a chain tensioning wheel for the bicycle chain and being movable relative to the upper body to bring the chain into selective engagement with a series of sprockets carried by the hub of the rear wheel of the bicycle, and a flexible cable for causing movement of the lower body. The lower body is carried by a control lever supported for rotation on a hollow cylindrical body which is rigidly connected to the upper body. A helical flexion spring is operatively interposed between the control lever and the upper body with its axis coincident with the axis of rotation of the control lever. The spring is preferably housed within the hollow cylindrical body.