Locking device for windows/sliding doors

Details Locking device for windows/sliding doors Locking device for windows/sliding doors

1989-01-03

1990-05-22

Smith, Gary L.

Closure fasteners

Rod clamps

Friction-plate catch

292338, 292DIG47, 16 66, 49450, 49362, E05C 1730

Patent

active

049271989

ABSTRACT:
A safety device for sliding windows or doors comprising a hydraulic cylinder assembly including a piston and piston rod wherein the piston rod is pivotally secured at its lower end and is made adjustable so that the sliding window or door may be moved from a fully closed position to variable open positions.

REFERENCES:
patent: 350460 (1886-10-01), Leslie
patent: 2114910 (1938-04-01), Shattuck
patent: 3136290 (1964-06-01), Bailey et al.
patent: 3278979 (1966-10-01), Clement
patent: 3566434 (1971-03-01), Grinsteiner
patent: 3637247 (1972-01-01), Manion
patent: 4079479 (1978-03-01), Clement
patent: 4152018 (1979-05-01), Cantrell
patent: 4792169 (1988-12-01), Petry

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