Power-actuated motor-vehicle door latch with antitheft mode

Details Power-actuated motor-vehicle door latch with antitheft mode Power-actuated motor-vehicle door latch with antitheft mode

1994-08-29

1995-12-12

Cuomo, Peter M.

Closure fasteners

Bolts

Swinging

292199, 292DIG27, E05C 306

Patent

active

054743389

ABSTRACT:
A motor-vehicle door latch has a latching element movable between a latched position and an unlatched position, and a locking pawl engageable with the element and displaceable between a locked position retaining it in the latched position and an unlocked position allowing it to move into the unlatched position. Power actuation is effected by a planetary-gear drive and including a reversible electric motor, a sun gear rotatable by the motor about the planetary axis, at least one planet gear meshing with the sun gear, a planet carrier carrying the planet gear, and a ring gear meshing with the planet gear. A locking lever is displaceable by a door handle and by the planet carrier between a locked position and an unlocked position and a coupling element is displaceable in the housing between a coupling position engaged between the locking pawl and locking lever for coupling the locking pawl and lever together for joint movement from the unlocked to the locked position and a decoupling position permitting the locking lever to move between its position without moving the locking pawl. An antitheft element is displaceable by the sun gear between an antitheft-on position engageable with the coupling element and retaining same in the decoupling position and an antitheft-off position permitting the coupling element to move between its positions. Structure coupled to the antitheft element arrests the planet carrier in the antitheft-on position of the antitheft element.

REFERENCES:
patent: 4223927 (1980-09-01), Kobayashi et al.
patent: 4573723 (1986-03-01), Morita et al.
patent: 4974886 (1990-12-01), Kleefeldt
patent: 4978154 (1990-12-01), Kleefeldt
patent: 5149159 (1992-09-01), Kleefeldt
patent: 5261711 (1993-11-01), Mizuki et al.
patent: 5409277 (1995-04-01), Rogers, Jr. et al.

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