Land vehicles – Wheeled – Attachment
Patent
1991-05-06
1992-11-17
Mitchell, David M.
Land vehicles
Wheeled
Attachment
297475, 297478, 297480, 242107, B60R 2246
Patent
active
051637081
ABSTRACT:
A preloader for use in a webbing retractor for allowing a webbing to be fitted closely around a vehicle occupant at the time of an emergency of a vehicle. The preloader includes a gas generating device for generating a gas instantaneously at the time of an emergency of the vehicle; a moving member adapted so as to be moved by the pressure of the gas; a force converting/transmitting device connected to the moving member and adapted to move together with the moving member so as to convert the moving force of the moving member into a torque acting in a webbing taking-up direction and transmit the torque to a takeup shaft of the webbing retractor; and a force transmission preventing device for preventing the moving force of the moving member from being transmitted to the force converting/transmitting device when a load exceeding a predetermined value is applied by the force converting/transmitting device to the moving member. When a force exceeding the predetermined value is applied by the force converting/transmitting device to the moving member with the webbing fitted closely around the occupant, the moving force of the moving member is prevented from being transmitted to the force converting/transmitting device by means of the force transmission preventing device. Hence, it is possible to prevent the webbing from being pulled excessively, that is, beyond a desired state in which the webbing is fitted closely around the occupant with an appropriate tightness, thereby preventing discomfort from being imparted to the occupant.
REFERENCES:
patent: 4258934 (1981-03-01), Tsuge et al.
patent: 4328976 (1982-05-01), Tsuge et al.
patent: 4422669 (1983-12-01), Chiba et al.
patent: 4573322 (1986-03-01), Fohl
patent: 4789185 (1988-12-01), Fohl
Graysay Tamara L.
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
Mitchell David M.
LandOfFree
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