Chairs and seats – Body or occupant restraint or confinement – Safety belt or harness; e.g. – lap belt or shoulder harness
Patent
1986-07-07
1988-02-23
McCall, James T.
Chairs and seats
Body or occupant restraint or confinement
Safety belt or harness; e.g., lap belt or shoulder harness
24170, 280808, A62B 3500, B60R 2110
Patent
active
047266252
ABSTRACT:
A belt retraction cam lock having belt retraction locking means disposed between a pivotal top member and a bottom member to lockingly but releasably engage the belt to counterbalance the spring biased retraction spool of an emergency locking belt retractor, and having belt unlocking means also disposed between the top and bottom members for releasing the belt from the locking engagement of the belt retraction locking means when the belt is forcibly tensioned. The belt retraction locking means includes a latitudinally disposed ridge on the base member and a first cam latitudinally disposed on and pivotal about the axis of the pivotal top member, the belt being disposed therebetween, which define a belt locking position when the top member is pivoted to align the ridge and first cam, the belt being pinchingly arrested therebetween. The unlocking means includes a second cam over which the belt is slidably passable, which cam is adjacent and parallel to the first cam but offset about the pivotal axis of the top member. The second cam is operable to provide a moment of force about the pivotal axis of the top member when the belt is forcibly tensioned within the top and bottom members, the moment of force being of sufficient magnitude to overcome the belt retraction locking means and to forcibly rotate the top member from the belt locking position to a belt unlocking position, at which position the belt is free of any influence of the belt retraction cam lock.
REFERENCES:
patent: 3328856 (1967-07-01), Jonas
patent: 3844001 (1974-10-01), Holmberg
patent: 3852855 (1974-12-01), Bengtsson
patent: 3911535 (1975-10-01), Mauron
patent: 4484766 (1984-11-01), Buchmeier
patent: 4549770 (1985-10-01), Kurtti
Indiana Mills & Manufacturing Inc.
McCall James T.
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