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US 3,942,819 AGranted
Safety belt tensioning device
AssigneeVolkswagenwerk Aktiengesellschaft
InventorsWilfried Schwanz, Ernst Fiala, Rolf Warnecke, Peter Buchholz
Life of this patent
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Abstract
The invention concerns an apparatus for tensioning restraining devices, such as safety belts. The tensioning is effected by a piston arranged to move within a cylinder when actuated by a pressure medium. A return stopping device is provided to maintain tension after actuation.
Claims3
Apparatus for tensioning a safety belt when actuated, comprising, in combination:
- a. piston means;
- b. cylinder means, surrounding said piston means, for applying a force to cause said piston means to move therein upon actuation;
- c. intermediate means, connecting said piston means to the safety belt, for tensioning the safety belt upon movement of said piston, said intermediate means comprising roller means for winding said safety belt and drive means coupled to said roller means and, projecting into the path of travel of said piston means, for rotating said roller means upon actuation of said piston means;
- and
- d. return stop means for maintaining tension in the safety belt after tensioning by said intermediate means.
2 more elements
Dependencies are inferred from the claim text.