Power-assist motor-vehicle door latch

Details Power-assist motor-vehicle door latch Power-assist motor-vehicle door latch

1996-05-17

1998-06-23

Lindsey, Rodney M.

Closure fasteners

Bolts

Swinging

E05C 306

Patent

active

057694680

ABSTRACT:
A motor-vehicle door latch has a fork formed with a detent and pivotal from a latched position retaining a bolt deep, a semilatched position retaining the bolt shallow, and an unlatched position permitting the bolt to enter and exit the latch. A main rocker coaxial with the fork can pivot with the fork between the latched and semilatched positions and a drive is connected to the main rocker for pivoting same about the main axis between the latched and semilatched positions. A pawl pivoted on the main rocker about a secondary axis offset from the main axis is provided offset from the axes with an axially projecting actuator pin and can move between an inner position engaging the detent and rotationally coupling the fork to the main rocker and an outer position clear of the detent and permitting the fork to rotate independently of the main rocker. A secondary rocker pivoted on the main axis is provided with a cam formation having a lifting portion engageable with the actuator pin to displace the pawl from its inner position to its outer position and a holding portion engageable with the actuator pin to retain it in its outer position. A coupling and formations on the fork and main rocker in the semilatched position hold the pawl with the holding portion in the outer position and in the unlatched position hold the actuator pin out of engagement with the holding portion.

REFERENCES:
patent: 4518180 (1985-05-01), Kleefeldt et al.
patent: 4948183 (1990-08-01), Yamada
patent: 5074603 (1991-12-01), Brackmann
patent: 5423582 (1995-06-01), Kleefeldt
patent: 5454607 (1995-10-01), Ishihara et al.

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