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:
Feb. 05, 1991
Filed:
Dec. 21, 1987
Duane H Grimm, Rockford, IL (US);
Sundstrand Corporation, Rockford, IL (US);
Abstract
A system for damping relative rotation between two axially driven shafts (30) rotating in the same direction and for indicating failure of one of the shafts is disclosed. The system includes a coupling mechanism (34), coupling the driven shafts together to transmit torque from one of the shafts to the other of the shafts upon a predetermined relative angular rotation between the two shafts and providing a free zone of relative rotation between the shafts without transmitting torque between the shafts when the shafts have moved less than a predetermined angular rotation with respect to each other within the free zone of rotation. A mechanism (32) is provided which is coupled to the shafts for producing movement of a movable member (40) which is directly proportional to the degree of relative rotation between the shafts (30) during relative rotation between the shafts less than the predetermined relative angular rotation within the free zone of rotation. A retarding mechanism (62) is provided for retarding the motion of the movable member (40) with a force for retarding movement of the movable member when the shafts are rotating relatively with respect to each other through an angle less than the predetermined relative angular rotation within the free zone of rotation which restricts the rate of relative motion of the shafts with respect to each other. Further, an indicator (66) is provided which produces a signal upon movement of the shafts with respect to each other through the predetermined relative angular rotation within the free zone of rotation.