Automatic window sash and lock operator

Details Automatic window sash and lock operator Automatic window sash and lock operator

1995-03-31

1996-07-02

Kannan, Philip C.

Movable or removable closures

Operator interrelated with closure latch release

49341, 49345, E05F 1102

Patent

active

055310451

ABSTRACT:
A window operator and lock structure for controlling a window sash relative to a window frame, including a drive input securable to a frame and engaging both an operator linkage securable to a window sash to effectuate motion of a secured sash relative to a frame, and a lock linkage securable to a lock structure for locking a secured sash to a frame. A link in the lock linkage moves in a generally longitudinal direction when operating the lock structure and includes a substantially transverse slot. A cam is pivotable about a cam axis fixed relative to the frame and includes a member receivable in the link slot to block operation of the lock linkage. The sash when closed against the frame includes a member engaging the cam to pivot the cam in a first direction moving the cam member clear of the link slot. The cam is blocked from pivoting when the sash is closed by engagement of the cam member with a side surface of the lock linkage link. The cam blocks the sash member from moving toward opening of the sash when the cam is positioned with the cam member clear of the link slot.

REFERENCES:
patent: 1724011 (1929-08-01), Flagg
patent: 2538980 (1951-01-01), Payne, Jr.
patent: 5054239 (1991-10-01), Tucker et al.
patent: 5111615 (1992-05-01), Kuhnt et al.
patent: 5152103 (1992-10-01), Tucker et al.

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