Safety belt takeup device with tightening means
First Claim
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1. A vehicle passenger restraint system comprising:
- a safety belt;
a safety belt retractor comprising a safety belt webbing takeup shaft having an axial extension; and
a safety belt retightening means associated with said retractor and comprising;
pulley means mounted for rotation about said axial extension of said takeup shaft,pulling means engaging the periphery of said pulley means for rotating the same upon tensioning of the pulling means, said pulling means being tensioned in an emergency,coupling means for establishing a driving connection between said pulley means and said axial extension of said takeup shaft to rotate said takeup shaft and transmit a tightening torque thereto when said pulley means rotates upon tensioning of said pulling means, andmeans for limiting the tightening torque transmitted from said pulley means to said takeup shaft.
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Abstract
The safety belt takeup device with tightening means comprises for transmitting the tightening force to the takeup shaft a rotatable roller (18) couplable to said shaft via a coupling means. At the periphery of the roller (18) the tightening force engages via a wire cable (36). In the force transmission path between the cable (36) and the takeup shaft a limiting means is provided which limits the torque which can be transmitted to the takeup shaft so that towards the end of a tightening operation no inadmissibly high tensile stresses occur in the webbing bearing on the body of the vehicle occupant.
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Citations
18 Claims
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1. A vehicle passenger restraint system comprising:
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a safety belt; a safety belt retractor comprising a safety belt webbing takeup shaft having an axial extension; and a safety belt retightening means associated with said retractor and comprising; pulley means mounted for rotation about said axial extension of said takeup shaft, pulling means engaging the periphery of said pulley means for rotating the same upon tensioning of the pulling means, said pulling means being tensioned in an emergency, coupling means for establishing a driving connection between said pulley means and said axial extension of said takeup shaft to rotate said takeup shaft and transmit a tightening torque thereto when said pulley means rotates upon tensioning of said pulling means, and means for limiting the tightening torque transmitted from said pulley means to said takeup shaft. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification