Pneumatic door operator

Details Pneumatic door operator Pneumatic door operator

1988-07-08

1991-08-20

Dorner, Kenneth J.

Movable or removable closures

Up-and-over type; e.g., moves from vertical to withdrawn...

With operator

49361, 92 88, E05F 1500

Patent

active

050403320

ABSTRACT:
An operator system for a counterbalanced door includes a rodless fluid cylinder that has a cylinder body and a rodless piston adapted for reciprocation in the cylinder body. A carriage which is adapted for reciprocation externally along the length of the cylinder body is secured to the piston. A link member connects the cylinder carriage to a door or to a torsion bar for the door. A control circuit is provided for controlling the operation of the fluid cylinder and hence the position of the door.

REFERENCES:
patent: 2330006 (1943-09-01), Odenthal
patent: 3221610 (1965-12-01), King et al.
patent: 3231259 (1966-01-01), Bobrowski et al.
patent: 3319303 (1967-05-01), Salvo
patent: 3349516 (1967-10-01), Armstrong
patent: 3537503 (1970-11-01), Simmonds
patent: 3893378 (1975-07-01), Hewitt
patent: 4231191 (1980-11-01), Ellmore
patent: 4414779 (1983-11-01), Carli
patent: 4417418 (1983-11-01), Waring
patent: 4481869 (1984-11-01), Garlapaty
patent: 4519297 (1985-05-01), Lipinski
Tol-O-Matic product brochure; Tol-O-Matic, Inc. 1028 S. 3rd St., Minneapolis, MN 55415.
Tol-O-Matic Band Cylinder Brochure.

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