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Centralized door locking system

  • US 4,805,427 A
  • Filed: 04/24/1987
  • Issued: 02/21/1989
  • Est. Priority Date: 05/02/1986
  • Status: Expired due to Fees
First Claim
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1. A centralised door locking system in a motor vehicle having a door for a driver of the vehicle, one or more doors providing access for passengers in the vehicle, and a tailgate providing access to a luggage compartment of the vehicle, in which system lockable latches are provided on all of the doors and on the tailgate, and lockable latches on the driver'"'"'s door and the tailgate being key-operable lockable latches, and said lockable latches are interconnected by a switchable actuation system;

  • the lockable latch on the driver'"'"'s door having a key movable member effective to actuate the lockable latch on the driver'"'"'s door between locked and unlocked conditions and further effective to activate a first multi-position switch connected in the switchable actuation system, the key movable member of the lockable latch on the driver'"'"'s door being movable from an unbiased position in one direction by key rotation against a first bias to a first biased position in which the lockable latch on the driver'"'"'s door is actuated to an unlocked condition and further movable in the one direction against a second bias far stronger than the first bias to a second biased position in which the first multi-position switch is actuated to condition the switchable actuation system to unlock all of the lockable latches and further being movable from the unbiased position in the opposite direction against a third bias to a third biased position in which the first multi-position switch is actuated to condition the switchable actuation system to lock all the lockable latches;

    the lockable latch on the tailgate having a key movable member effective to actuate the lockable latch on the tailgate between locked and unlocked conditions and further effective to activate a second multi-position switch connected in the switchable actuation system, the key movable member of the lockable latch on the tailgate being movable from an unbiased position in one direction by key rotation agianst a fourth bias to a fourth biased position in which the second multi-position switch is actuated to condition the switchable actuation system to lock all the lockable latches and further being movable in the opposite direction against a fifth bias to a fifth biased position in which the lockable latch on the tailgate is actuated to the unlocked condition.

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