Machine element or mechanism – Control lever and linkage systems – Hand operated
Patent
1994-03-29
1996-01-09
Lorence, Richard M.
Machine element or mechanism
Control lever and linkage systems
Hand operated
280806, 297480, B60R 2246
Patent
active
054819407
ABSTRACT:
A piston and cylinder unit for use in a vehicle safety belt pretensioner is provided with a tubular cylinder and a piston slidably accomodated in the cylinder tube. The piston has a circumferential groove between a pair of axially spaced radial shoulders. A cable is connected to the piston. A pair of semi-annular disks are located in said the circumferential groove of the piston with circumferential ends bearing on each other. The semi-annular disks are held in positions with opposite oblique slope in relation to the central axis of the cylinder tube. An outer edge portion of each semi-annular disk is held in engagement with the inner wall surface of the cylinder tube. When the piston tends to move through the cylinder tube in a direction opposite to an operating stroke, the semi-annular disks are erected and jammed in the cylinder tube to block further movement of the piston.
REFERENCES:
patent: 4008780 (1977-02-01), Bendler et al.
patent: 4091621 (1978-05-01), Patrichi
patent: 4152025 (1979-05-01), Bendler et al.
patent: 4458921 (1984-07-01), Chiba et al.
patent: 5207618 (1993-05-01), Nishizawa
patent: 5358275 (1994-10-01), Fohl
Lorence Richard M.
TRW (Repa) GmbH
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