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:
Oct. 05, 1976
Filed:
May. 05, 1975
Hellmut Bendler, Nurnberg, DT;
Uwe Brede, Schwaig, DT;
Egon Flach, Cologne-Riehl, DT;
Gerrit Scheiderer, Furth, DT;
Abstract
A rotary power device for use in conjunction with tensioning mechanism of safety devices for the protection of passengers in vehicles and the like. The preferred embodiment disclosed is used for tensioning safety belts of a vehicle passenger restraint system in response to predetermined experienced deceleration such as occur in an accident situation. The rotary power device includes a rotary piston guided in a helically wound guide track such that the piston moves both rotatably and axially in response to compressed gas forces against a pressure face which extends in a plane containing the axis of rotation of the piston. A coupling bushing arrangement is interposed between the piston and the rotating shaft accommodating the safety belt, with axial movement of the piston with respect to the bushing and shaft, and with rotatable locking of the piston and shaft. In preferred embodiments, the rotary locking of the piston and the shaft is initiated only after the release of compressed gases causes an axial shifting of the bushing.