Gate operator for vertical gate movement

Details Gate operator for vertical gate movement Gate operator for vertical gate movement

1999-02-01

2000-01-04

Redman, Jerry

Movable or removable closures

With operator for movably mounted closure

Operating lever or link and closure swing about parallel axes

49226, E05F 1124

Patent

active

060096705

ABSTRACT:
A gate operator for lifting a gate about a horizontal axis at a lower proximate corner thereof to vertically raise and lower a gate in a generally 90 degree arc in the plane of the gate by using a fractional horsepower motor and an energy accumulator, which can be a torsion motor, a pneumatic mechanism or an enclosed spring mechanism. The motor is only used to initiate movement in the upward and downward cycles of the gate and to regulate the speed of the gate by damping the release of accumulated energy. A drive mechanism connects the motor to the energy accumulator. Energy is stored to the energy accumulator during the downward movement of the gate and released during the upward movement of the gate to reduce the amount of power required to operate the gate. The stored energy in the energy accumulator balances the gate such that it is held in a virtual weightless condition in all positions of its arcuate movement, allowing the gate to be moved from or to its open or closed position with a minimal amount of energy. The drive mechanism locks the gate in its open vertical position and in its closed horizontal position.

REFERENCES:
patent: 4519164 (1985-05-01), Porter
patent: 4658543 (1987-04-01), Carr
patent: 4887393 (1989-12-01), Cysewski
patent: 5131187 (1992-07-01), Agnew et al.
patent: 5263281 (1993-11-01), Osborn
patent: 5299386 (1994-04-01), Naegelli et al.
patent: 5440838 (1995-08-01), Lesser

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