Land vehicles – Wheeled – Attachment
Patent
1991-03-13
1992-07-14
Rice, Kenneth R.
Land vehicles
Wheeled
Attachment
280807, 180282, B60R 2216
Patent
active
051296802
ABSTRACT:
A preloader sensor which is applied to a webbing retractor for winding a webbing for constraining a vehicle passenger, onto a winding shaft in a stratified arrangement, in order to activate operation of a preloader for tightly holding each passenger with the webbing immediately upon instantaneous detection of rapid deceleration of vehicle speed. The preloader sensor comprises the following; a sensor unit incorporating a mechanism for detecting rapid deceleration of vehicle speed; a releasing member which causes a mass-substance receptive member to enter into a displaceable or an undisplaceable condition, this releasing member causing the mass-substance receiving member to enter into a displaceable, operation capable condition only when the releasing member is moved to a specific position as a result of receiving a predetermined amount of pressure from a fastened bolt, and causing the mass-substance receiving member to move into an undisplaceable condition when the releasing member is moved to a specific position free of pressure from the fastened bolt, and further, this releasing member being capable of moving from one to the other of the pressure-affected position and the pressure-free position; and an energizing means which constantly exerts a force on the releasing and causes it to move when it is at the position free of the pressure of the fastened bolt. Thus, the preloader sensor is reliably prevented from operating under any conditions except for that in which the webbng retractor is perfectly secured to the vehicle body, by virtue of the bolt being screwed in a predetermined amount.
REFERENCES:
patent: 4508287 (1985-04-01), Nilsson
patent: 4508288 (1985-04-01), Nilsson
patent: 4889068 (1989-12-01), Tabata et al.
patent: 4968059 (1990-11-01), Motozawa et al.
patent: 5037134 (1991-08-01), Tabada
Kabushiki Kaisha Tokai-Rika-Denki-Seisakusho
Rice Kenneth R.
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