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:
Mar. 20, 1990
Filed:
Jun. 15, 1987
William C Trommer, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A unidirectional no-back device having an input shaft and an output shaft and grounded releasable brake structure for holding the output shaft against rotation. A drive train between the input and output shafts has first and second ball and ramp structures. The first ball and ramp structure is operable upon rotation of the input shaft in either direction by a prime mover to release the brake structure and enable driving of the output shaft by the input shaft. The second ball and ramp structure is responsive to torque flow from rotation of the output shaft in one direction to release the brake structure to permit backdriving of the input shaft and prime mover from the output shaft and is inoperative in response to torque flowing in an opposite direction of rotation of the output shaft so as to not release the brake structure and thus preclude rotation of the output shaft.