초록 ▼

A pyrotechnic piston and cylinder assembly raises a belt guide, pulling two segments of a safety belt upwardly away from a vehicle seat. The extension of the two segments removes slack from the safety belt. After the piston is fully extended, a pair of wedges jam an inner wall of the cylinder, provi

A pyrotechnic piston and cylinder assembly raises a belt guide, pulling two segments of a safety belt upwardly away from a vehicle seat. The extension of the two segments removes slack from the safety belt. After the piston is fully extended, a pair of wedges jam an inner wall of the cylinder, providing resistance to the retraction of the shaft into the cylinder. As the belt forces overcome the resistance from the wedges, the piston is pushed back into the cylinder and a portion of belt is permitted to extend, relieving tension in the safety belt. The wedges plastically deform the inner wall of the cylinder, thereby absorbing a portion of the energy of the collision.

대표청구항 ▼

[ What is claimed is:] [1.] A safety system for protecting an occupant comprising:a three-point belt system (23) comprising a retractor (36) lockable in an emergency, a seat belt (24) divided into a shoulder belt portion (34) and a lap belt portion (35), a tongue (37) situated on the seat belt (24),

[ What is claimed is:] [1.] A safety system for protecting an occupant comprising:a three-point belt system (23) comprising a retractor (36) lockable in an emergency, a seat belt (24) divided into a shoulder belt portion (34) and a lap belt portion (35), a tongue (37) situated on the seat belt (24), the tongue lockable with a buckle (67), the shoulder belt portion (34) extending over a web guide (26), the system (24) being disposable about the occupant with some degree of slack;first means, associated with the web guide for vertically moving the web guide, the first means, including occupant controllable means, responsive to an occupant input, for moving the web guide to a desired vertical position during a non-emergency condition and belt tightening means (20) for moving the web guide (26) upwardly, during an emergency, from the position established by the occupant movable means, to reduce the slack.