F - Mech Eng,Light,Heat,Weapons – 16 – H
Patent
F - Mech Eng,Light,Heat,Weapons
16
H
F16H 1/16 (2006.01) B60N 2/22 (2006.01)
Patent
CA 2126224
A device (10) for adjusting the relative incli- nation of two elements, and in particular, the rela- tive inclination of a back member (12) of an auto- motive seat pivotally connected about a rotational axis to a base member (14) of the seat for move- ment through a predefined arc is disclosed. The de- vice can include at least an enveloping gear sector (20) for pivotal connection to the base member (14) about an axis generally coaxial with the rotational axis between the back and base members. The gear sector (20) preferably includes plastic concave teeth (24) formed thereon. An enveloping worm (22) is provided for rotatable connection to the base mem- ber (14). The worm (22) preferably is formed of at least one plastic concave worm having at least a single thread. The worm (22) is disposed in double enveloping engagement with the gear sector (20). A rotatable cam (36) is pivotally connecting the sector gear (20) to the base member (14). The rotatable cam (36) is pivotal along a predetermined arc about an axis of rotation generally coaxial with the rotational axis of the back member (12). A spring (38) biases the rotatable cam (36) in a rotational direction such that the gear (20) is urged into positive engagement with the worm (22) at any angular position of move- ment. A motion transmitting member (30) connects the gear sector (20) to the back member (14) at a position radially spaced from the rotational axis of the back member and generally is disposed between the rotational axis of the back member and the teeth (24) of the gear sector (20). A drive mechanism (40) is provided for rotating the worm (22) in clockwise and counterclockwise di- rections. A releasable lock member (44) is also provided for preventing unintentional movement of the worm. (22) in either rota- tional direction.
Lear Corporation
Smart & Biggar
LandOfFree
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