Movable or removable closures – Up-and-over type; e.g. – moves from vertical to withdrawn... – With operator
Patent
1975-12-24
1977-04-19
Kannan, Philip C.
Movable or removable closures
Up-and-over type; e.g., moves from vertical to withdrawn...
With operator
160188, E05F 1516
Patent
active
040180050
ABSTRACT:
A door operator for moving a door between a closed position wherein the door extends substantially vertically and closes a door opening and an open position wherein the door extends substantially horizontally and is disposed adjacent the upper edge of the door opening. The operator includes an elongated guide which extends in a substantially horizontal direction away from the door opening. A carriage is engaged with the guide and is movable therealong. A drawbar assembly is connected between the carriage and the door, and a motor is drivingly interconnected to the carriage for moving same along the guide to result in movement of the door between the open and closed positions. The drawbar assembly includes a first arm member hingedly connected to the carriage at a first pivot axis, and a second arm member hingedly connected to the door at a second pivot axis which is substantially parallel to but spaced from the first pivot axis. A spring unit is connected between the first and second arm members for permitting relative movement therebetween.
REFERENCES:
patent: 2851266 (1958-09-01), Klamp
patent: 2882045 (1959-04-01), Moore
patent: 3048385 (1962-08-01), Reynolds
patent: 3704548 (1972-12-01), Wiegler
patent: 3858452 (1975-01-01), Gatland et al.
Kannan Philip C.
Overhead Door Corporation
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