Chairs and seats – Movable back – Tiltable
Patent
1986-10-27
1987-11-17
McCall, James T.
Chairs and seats
Movable back
Tiltable
297216, 297378, B60N 102
Patent
active
047070102
ABSTRACT:
A seatback latching mechanism for use in a vehicle seat assembly having a backrest member pivotally tiltable over a seat member. The mechanism has a first latch means fixed relative to the seat member and a second latch means pivotally mounted on the backrest member for pivotal movement thereof between an unlatched and a latched position in which tilting movement of the backrest member over the seat member is restrained. Pendulum means are pivotally mounted on the backrest member for pivotal movement independently of the pivotal movement of the second latch means between first and second pendulum limit positions at which limit positions the pendulum means impinges upon the second latch means.
In the normal upright position of the backrest member, the pendulum means is gravity biased to the first limit position in which the composite center of gravity of the pendulum means and the second latch means is positioned eccentrically of the pivot axis thereby urging the second latch means towards the unlatched position. Upon the occurrence of a first vehicular deceleration force sufficient to overcome the gravity biasing of the pendulum means to the first limit position, the pendulum means pivotally moves to the second pendulum limit position thereby increasing the sensitivity of the mechanism to latching, such that, upon the attainment of a second greater vehicular deceleration force, the second latch means moves rapidly to the latched position thereof.
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Croft George
Hiscox Martyn
Canadian A.S.E. Limited
McCall James T.
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