Window

Details Window Window

1989-12-28

1991-09-24

Smith, Gary L.

Movable or removable closures

Operator interrelated with closure latch release

49 83, 49260, 49345, E05F 1102

Patent

active

050503456

ABSTRACT:
A window stay is provided for a casement window so that its window sash is shifted outwardly from the window frame as it is being opened. The window stay comprises a first arm, a second arm and a third arm associated with a driving rod. The first arm has points pivotally attached to the window sash and the window frame and swings the window sash in relation to the window frame as the driving rod is operated. The second arm has points respectively pivotally attached to the window sash and the driving rod swings the window sash in relation to the first arm as the driving rod is operated. The third arm has points respectively pivotally attached to the first arm and the driving rod and swings the first arm in relation to the window frame in accordance with the movement of the driving rod. The window stay is provided with a lock for the window sash, operated by the acting rod. A differential structure is provided between the driving rod and the acting rod by which the window sash is unlocked before being opened and locked after being closed.

REFERENCES:
patent: 1748662 (1930-02-01), Stewart
patent: 2926397 (1960-03-01), Vuncannon
patent: 2981538 (1961-04-01), Bennett
patent: 3071219 (1963-01-01), Vuncannon
patent: 3257755 (1966-06-01), Lewis
patent: 3420000 (1969-01-01), Esser
patent: 3438151 (1969-04-01), Evers et al.
patent: 4301622 (1981-11-01), Dunsmoor
patent: 4361985 (1982-12-01), DeMarco
patent: 4703960 (1978-11-01), Lense
patent: 4823508 (1989-04-01), Allen

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