Door opener

Movable or removable closures – Up-and-over type; e.g. – moves from vertical to withdrawn... – With operator

Patent

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Details

49200, 49359, E05F 1100

Patent

active

046240764

ABSTRACT:
An opening mechanism for a tip-up door especially for garages which comprises levers fixed on a shaft which is mounted hingedly on the door, the levers having their distal ends connected to the door frame and torque applying structure being functionally connected with the shaft and a motor to apply torque for opening the door with the structure and motor being mounted on the door. The torque applying structure can be a crank or a gear system. An initiator can comprise either a manually applied switch or remote initiating means such as ultra-sonic or radio signals. This opening mechanism applies a torque to the levers to lift the door open in a tip-up action but additionally applies a reaction torque to the door itself to swing it up in the typical tip-up fashion while the levers lift it.

REFERENCES:
patent: 2602664 (1952-07-01), Matchett
patent: 3436862 (1969-04-01), Stansberry
patent: 3591981 (1971-07-01), Law

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