Movable or removable closures – With operator for movably mounted closure – Operator drives closure along guide
Reexamination Certificate
2000-10-30
2002-02-05
Cohen, Curtis A. (Department: 3634)
Movable or removable closures
With operator for movably mounted closure
Operator drives closure along guide
C049S139000, C074S396000
Reexamination Certificate
active
06343436
ABSTRACT:
FIELD OF THE INVENTION
This invention relates to a sash drive assembly for sliding sashes.
BACKGROUND OF THE INVENTION
Sashes of the sliding type are often heavy or sticking and are often tightly held by sealing tracks so that especially weak or infirm persons need means for operating them.
SUMMARY OF THE INVENTION
The invention is a self-contained drive assembly for sliding sash windows. It comprises a rack gear adapted to be connected to the sash parallel to the direction of sash movement and a drive unit adapted to be mounted on a widow frame element associated with a sash and extending in the same direction. The drive unit comprises a housing containing a drive motor and output spur. It also comprises an L-shaped engagement lever pivotally attached to the housing at its vertex and a rack guide pivotally attached to the L-shaped engagement lever on the short arm of the “L”. By manipulating the long arm of the L-shaped lever, the user can move the guide to position the rack against the spur gear in a firm but releasable way so that when the motor in the housing is activated, the spur drives the rack and, hence the sash, up or down. Batteries for the motor and controls may be provided in the housing.
REFERENCES:
patent: 130542 (1872-08-01), Shumusk
patent: 193418 (1877-07-01), Morris
patent: 3324594 (1967-06-01), Hettinger et al.
patent: 3469345 (1969-09-01), Hanks
patent: 3736702 (1973-06-01), Pickles
patent: 4165583 (1979-08-01), Meyer
patent: 4167834 (1979-09-01), Pickels
patent: 5701211 (1997-12-01), Perry et al.
Milano, Jr. Arthur J.
Parent Herman J.
Cohen Curtis A.
Hoopes Dallett
Seitz Corporation
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