Counterbalanced window operator

Details Counterbalanced window operator Counterbalanced window operator

1993-06-14

1995-08-22

Redman, Jerry

Movable or removable closures

With means mounting closure for swinging

With biasing means

49343, 49340, E05F 110

Patent

active

054428793

ABSTRACT:
A counterbalanced window operator includes a housing in which a rotatable lead screw, rotated by a crank handle or electric power unit, cooperates with a non-rotatable nut member to axially displace the nut member and move pivoting arms to open and close the window.

REFERENCES:
patent: 1938502 (1933-12-01), Steindler et al.
patent: 2698173 (1954-12-01), Rydell
patent: 2767979 (1956-10-01), Hummert
patent: 2779069 (1957-01-01), Ziesmer
patent: 4521993 (1985-06-01), Tacheny et al.
patent: 4553656 (1985-11-01), Lense
patent: 5097629 (1992-03-01), Guhl et al.
patent: 5179803 (1993-01-01), Lense
English translation of German Patent 186,670.
English translation of German Patent 824,752.
English translation of German Utility Model No. 90 03 179.2
English translation of Swiss Patent 324,587.

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