Power-operated motor-vehicle door latch with antitheft

• US 6,416,088 B1
• Filed: 09/08/2000
• Issued: 07/09/2002
• Est. Priority Date: 09/10/1999
• Status: Expired due to Fees

• Current Assignee: Kiekert AG (Lingyun Industrial Corporation Limited)
• Original Assignee: Kiekert AG (Lingyun Industrial Corporation Limited)
• Inventors: Graute, Ludger
• Primary Examiner(s): Browne, Lynne H.
• Assistant Examiner(s): Walsh, John B.
• Application Number:
  US09/657,721
• Time in Patent Office: 669 Days
• Field of Search: 292/216, 292/201, 292/DIG.23, 292/DIG.25, 702/64, 702/77
• US Class Current: 292/216
• CPC Class Codes: E05B 77/28 for anti-theft purposes, e.g. double-locking or super-locking
• CPC Class Codes: E05B 81/06 using rotary motors
• CPC Class Codes: E05B 81/14 operating on bolt detents, e.g. for unlatching the bolt
• CPC Class Codes: E05B 81/64 Monitoring or sensing, e.g. by using switches or sensors
• CPC Class Codes: Y10S 292/23 Vehicle door latches
• CPC Class Codes: Y10T 292/1047 Closure
• CPC Class Codes: Y10T 292/1082 Motor

Abstract

A motor-vehicle door latch has a latch housing, a latch fork pivotal on the housing, a latch pawl movable on the housing between a holding position engaging the fork and preventing pivoting of same and a freeing position permitting pivoting of the latch fork, and a locking lever displaceable coupled with the latch pawl and displaceable between a unlocked position permitting the latch pawl to move into the freeing position and a locked position preventing movement of the latch pawl into the freeing position. A pivotal control member is movable between a power-open position pivoting the latch pawl into the freeing position, an antitheft-on position blocking movement of the locking lever into the unlocked position, and an antitheft-off position permitting movement of the locking lever into the locked position. A drive including a single electrical motor is connected to the control member for pivoting same between its power open, antitheft-on, and antitheft-off positions.

Claims

1. A motor-vehicle door latch comprising:

a latch housing;

a latch fork pivotal on the housing;

a latch pawl movable on the housing between a holding position engaging the latch fork and preventing pivoting of same and a freeing position permitting pivoting of the latch fork;

a locking lever displaceable coupled with the latch pawl and displaceable between an unlocked position permitting the a latch pawl to move into the freeing position and a locked position preventing movement of the latch pawl into the freeing position;

a pivotal control member movable between

a power-open position pivoting the latch pawl into the freeing position,

an antitheft-on position blocking movement of the locking lever into the unlocked position, and

an antitheft-off position permitting movement of the locking lever into the locked position; and

drive means including a single electrical motor connected to the control member for pivoting same the control member between the power-open, antitheft-on, and antitheft-off positions.

2. The motor-vehicle door latch defined in claim 1, further comprising

a release lever connected between the control member and the latch pawl.

3. The motor-vehicle door latch defined in claim 1 wherein the control member is pivotal and has an arm engageable directly with the locking lever and at least indirectly with the latch pawl.

4. The motor-vehicle door latch defined in claim 1 wherein the control member is pivotal and has one arm engageable directly with the locking lever and another arm at least indirectly engageable with the latch pawl.

5. The motor-vehicle door latch defined in claim 1, further comprising

an outside actuating lever;

and

an outside locking lever displaceable between a position coupling the outside actuating lever with the latch pawl and a position decoupling the outside actuating lever from the latch pawl, the control member being pivotal and having a bump engageable with the outside locking lever to displace same into its decoupling position.

6. The motor-vehicle door latch defined in claim 5, further comprising

an outside cylinder coupled to the outside locking lever to displace it between its coupling and decoupling positions, the member having a cam bump engageable with the outside locking lever for displacement of the member into the antitheft off position on actuation of the outside locking lever by the cylinder.