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. 09, 1987
Filed:
Apr. 19, 1985
Rodger T Lovrenich, Santa Teresa, NM (US);
Other;
Abstract
A zero backlash shiftable transmission includes an input shaft and an output shaft coupled through a gear network that is preloaded with a spring arrangement to eliminate the backlash from the engaged surfaces of the gear teeth. There are three positions and no neutral. In the first position a tapered clutch arrangement engages the input shaft directly with the output shaft. In the second or shift position, the clutch engages both the input shaft and the output shaft while the transmission is slowed or stopped for shifting. In the third position, the clutch engages the input shaft with the output shaft through the preloaded gear network. The tapered clutch arrangement provides locked clutch coupling in the first and third positions and provides tolerance for shifting without completely releasing either the input shaft or the output shaft in the shift position.