Apparatus for locking the leaf of a swing door

Details Apparatus for locking the leaf of a swing door Apparatus for locking the leaf of a swing door

1980-04-28

1982-01-05

Kannan, Philip C.

Movable or removable closures

Mounted for multidirectional or oblique movement

Sequential translation and swinging

49281, 49334, 49394, E05F 702

Patent

active

043086918

ABSTRACT:
An apparatus for locking a door leaf comprising a turnable shaft secured to the door by an arm to drive the door in opening and closing movements under the action of a piston-drive which produces slight axial movement of the shaft as the door approaches the closed position. A first locking element is fixed to the door frame and a second locking element is fixed to the door, the locking elements having wedge-shaped noses which interengage and lock the locking elements when the door is closed and the shaft is lifted. The locking element on the door frame includes an axial extension overlapping the nose of the locking element on the door to form an abutment to limit the degree of angular closure of the door. The axial extension can carry a friction-reducing insert to facilitate relative movement between the noses when the door is lifted at the end of the closure movement.

REFERENCES:
patent: 3346992 (1967-10-01), Lodge
patent: 3820282 (1974-06-01), Kornylak
patent: 3888045 (1975-06-01), Piegza
patent: 3902274 (1975-09-01), Ikio

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