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:
Nov. 18, 1997
Filed:
Aug. 09, 1996
Applicant:
Inventor:
Douglas M White, Point Reyes, CA (US);
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16H / ;
U.S. Cl.
CPC ...
474 80 ; 474119 ;
Abstract
A derailleur for a bicycle for changing the speed of the bicycle. The derailleur can be distinguished from prior parallelogram designs in employing stationary guide rods over which a pulley wheel assembly is caused to slide as the bicycle's drive chain is shifted between various drive sprocket wheels. Gear shifting is done in a linear motion while being able to center the derailleur's pulley assembly without the use of a return spring which is currently employed by present day parallelogram derailleurs.