Multi-point lock operator for casement window

Closure fasteners – Operators with knobs or handles

Patent

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Details

292139, E05B 300

Patent

active

058298029

ABSTRACT:
An operator for a multi-point locking system for a casement window is provided. The operator includes a handle having two opposing legs that pass through side walls in the escutcheon thereby leaving the outer wall of the escutcheon intact. Due to a delay between movement of the handle and the first link which indirectly imparts movement of the handle to the tie bar, the handle can be rotated a full 180.degree. between the open and the closed positions while the first link is rotated through an angle of less than 180.degree.. As a result, the handle lies in a flat position with respect to the inside window frame surface in both the open and closed positions. Because of the handle design which employs two opposing legs disposed on opposite sides of the escutcheon, the operator can be used both on the right side and the left side of a window frame. The legs of the handle include inwardly extending shafts which are accommodated and supported by braces disposed on opposing sides of the base. The shafts of the legs of the handle engage the braces and arches disposed on the slots the sidewalls of the housing through which the shafts pass to provide a series of tongue-in-groove relationships which provide structural stability to the connection between the legs and the escutcheon and an effective seal between the handle, escutcheon and base of the operator.

REFERENCES:
patent: 3993338 (1976-11-01), Cherbourg et al.
patent: 4025096 (1977-05-01), Geer
patent: 4674777 (1987-06-01), Guelck
patent: 4828299 (1989-05-01), Poe
patent: 5118145 (1992-06-01), Tucker
patent: 5318333 (1994-06-01), Dreifert

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