Power-actuated motor-vehicle door latch with antitheft feature

US4978154A · kind A · utility

Assignees

• Kiekert GmbH & Co. Kommanditgesellschaft · DE
• Bayerische Motoren Werke Aktiengesellschaft · DE

Inventors

• Frank Kleefeldt · Heiligenhaus, DE
• Johannes-Theodor Menke · Velbert, DE
• Ulrich Kostler · Hebertshausen, DE

Key dates

• Filing date: Aug 4, 1989
• Grant date: Dec 18, 1990
• Expiry date: Aug 4, 2009

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T292/1082
• WIPO field: Civil engineering
• WIPO sector: Other fields

Abstract

A motor-vehicle door latch for use on a vehicle door having inside and outside handles and inside and outside locking elements has a first housing part that contains a latch fork engageable in a locking position with a door bolt to retain same and lock the door, a lock pawl engageable in a retaining position with the fork to retain same in the locking position, an outside operating lever connected to the outside handle, an outside locking lever connected to the outside locking element, and an unlocking lever connected to the outside locking lever and operable to unlock the door. A second housing part contains an inside operating lever connected to the inside handle, an inside locking lever connected to the inside locking element, a coupling device pivoted coaxially with the inside locking lever and having one arm connected to the unlocking lever of the first housing part and another arm, and a central actuating unit. This unit includes an actuator, a spindle, a nut on the spindle displaceable between an unlock, a lock, and an antitheft position, and a slide displaceable jointly with the nut between the lock and unlock positions and connected to the other arm of the coupling device.…