Automatic door lock

Details Automatic door lock Automatic door lock

1983-11-28

1986-04-08

Downey, Kenneth

Movable or removable closures

With operator for movably mounted closure

Coaxial of closure pivot

49137, 16 49, 16 58, E05F 1100

Patent

active

045803650

ABSTRACT:
In a door lock comprised of an elongated housing in which a piston loaded with a spring is displaceable in two opposite axial directions, a rotatable locking shaft connected to the door wing and provided with a pinion engaged with a rack formed on that piston, the spring is prestressed in the direction of the closing of the door. The spring acts on a displaceable supporting member which displaces the piston in the housing of the lock. An electromotor actuated by a control unit is operated to displace the supporting member.

REFERENCES:
patent: 4010572 (1977-03-01), Peterson
patent: 4040144 (1977-08-01), Lasier et al.
patent: 4115897 (1978-09-01), Zunkel
patent: 4220051 (1980-09-01), Catlett
patent: 4339843 (1982-07-01), Burnett, Sr.
patent: 4483043 (1984-11-01), Tillmann

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