Closure fasteners – Bolts – Swinging
Reexamination Certificate
1993-06-14
2001-04-10
Boucher, Darnell (Department: 3627)
Closure fasteners
Bolts
Swinging
C292S216000, C070S277000, C070S280000
Reexamination Certificate
active
06213524
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to automotive door locks, and in particular is concerned with a deadbolt locking actuator for a power door latch.
2. Description of the Related Art
Power door lock systems for vehicles are well-known. For additional security, some vehicles utilize a “deadbolt locking system” to prevent unwanted unlocking of a power door latch by moving a manual lock operator. Only when a predetermined signal (e.g., a key inserted and rotated in a key cylinder) is generated in such a system will a deadbolt actuator permit a door latch to be unlocked.
SUMMARY OF THE INVENTION
The present invention includes a deadbolt locking actuator for an automotive door latch. The deadbolt actuator is used in a locking system to prevent the unlocking of a door latch when a key has not been inserted and rotated in a selected door, e.g., the driver door. The locking system may include deadbolt actuators for all door latches.
In a preferred embodiment, a deadbolt locking actuator includes a housing mounting a reversible motor. A worm is fitted on an output shaft of the motor and meshed with a worm gear. A rotary arm is provided outside of the housing and coupled to the worm gear, A pin on the rotary arm is received in an elongated slot of a link connected to a manual locking lever of a door latch. A control circuit operates the drive unit and link between deadbolt and non-deadbolt positions.
REFERENCES:
patent: 4395064 (1983-07-01), Bellot et al.
patent: 4518181 (1985-05-01), Yamada
patent: 5035453 (1991-07-01), Fukumoto et al.
patent: 5052731 (1991-10-01), Hayakawa et al.
patent: 5074603 (1991-12-01), Brackmann
patent: 5169186 (1992-12-01), Fukumoto et al.
patent: 5240296 (1993-08-01), Kobayashi
patent: 0159238 (1985-10-01), None
Berklich Mark Michael
Bree Gary David
Rogers, Jr. Lloyd Walker
Boucher Darnell
General Motors Corporation
Griffin Patrick M.
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