Rotary power element
AssigneeDynamit Nobel Aktiengesellschaft
InventorHellmut Bendler
Life of this patent
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Abstract
A rotary power element for tensioning devices of safety mechanisms for protecting the occupants of vehicles by the use of safety belts has a rotatable drive mechanism, a compress-gas generator, and a tubular element between the drive mechanism and the compressed-gas generator. Also, the element includes at least one preformed acceleration member arranged in the tubular element. This member is capable of being driven forward against the drive mechanism under the action of compressed gas produced by said compressed-gas generator to accelerate the drive mechanism.
Claims22
A rotary power element for actuating tensioning devices which comprises a rotatable drive mechanism, a compressed-gas generator means, a tubular element between the drive mechanism and the compressed-gas generator means, and a plurality of preformed acceleration members arranged in mutual contact with each other in said tubular element, said compressed-gas generator means including a propellant charge means for simultaneously driving said acceleration members in mutual contact forward through and out of said tubular element against the drive mechanism under the action of compressed gas to rotate and to accelerate the drive mechanism.
A rotary power element for actuating tensioning devices which comprises a rotatable drive mechanism, a compressed-gas generator means, a tubular element between the drive mechanism and the compressed gas generator means, and a plurality of preformed acceleration members arranged in the tubular element, said compressed-gas generator means including a propellant charge means for simultaneously driving said preformed acceleration members forward through and out of said tubular element against the drive mechanism under the action of compressed gas to rotate and to accelerate the drive mechanism;
- said acceleration members being made of a synthetic resin and having annular guide elements at the forward and rearward ends of a peripheral surface thereof, with the rearward guide element providing a sealing lip contacting the wall of the tubular element and the rotatable drive mechanism comprising a wheel with a continuous profiled groove along its circumferential surface that is associated with the acceleration members to be accelerated, the shapes and dimensions of the profiled groove and of the acceleration members, respectively, conforming to each other whereby the acceleration members are driven into the profiled groove under the effect of the compressed gas to produce rotation and accleration of the wheel.
A rotary power element for actuating a tensioning device which comprises a rotatable drive mechanism, a compressed-gas generator means, a tubular element between the drive mechanism and the compressed-gas generator means, and a plurality of preformed acceleration members arranged in the tubular element;
- said rotatable drive mechanism including a wheel defining a continuous profiled groove along a circumferential surface;
- said compressed-gas generator means includes a propellant charge means for simultaneously driving said acceleration members in mutual contact forward through and out of said tubular member into said drive mechanism under the action of compressed gas to engage the profiled groove defined by said wheel to cause rotation and acceleration of the drive mechanism.
Dependencies are inferred from the claim text.