Movable or removable closures – Treadle or impact initiated operator
Patent
1996-03-28
1998-02-24
Dorner, Kenneth J.
Movable or removable closures
Treadle or impact initiated operator
49265, 49273, E05F 1304
Patent
active
057201323
ABSTRACT:
A fence gate opener with fluid gravity closure assembly having 1) a main closure gate assembly with a main gate assembly; 2) a main support base assembly operable to be connected to a ground support surface and having the main gate assembly pivotally connected thereto; 3) a fluid gravity closure assembly operably connected to the main support base assembly and the main gate assembly for pivotal movement therewith; and 4) a gate actuator treadle assembly operably connected to the main support base assembly and the main gate assembly to cause pivotal movement thereof from the opened to the closed conditions. The main closure gate assembly includes a counterbalance weight assembly being rotatable with the main gate assembly on a pivot shaft member from opened to closed conditions of the main gate assembly. The main support base assembly includes a support frame assembly having a pivotal gate support assembly connected thereto. The fluid gravity closure assembly includes a weight transfer fluid tank assembly having a sealed fluid flow system with three tank members operable to 1) have fluid flow from a first tank member to a second tank member in the opened condition; and 2) have controlled fluid flow from the second tank member to a third tank member and back to the second tank member to provide a controlled movement of the main gate assembly from the opened to the closed conditions. The gate actuator treadle assembly can be a mechanical actuator treadle assembly or a hydraulic actuator treadle assembly which can be used on irregular terrain ground support surfaces.
REFERENCES:
patent: 1672723 (1928-06-01), McClary
patent: 2166743 (1939-07-01), Miller
patent: 2293462 (1942-08-01), Haynes
patent: 3041759 (1962-07-01), Treiber
patent: 4521992 (1985-06-01), Campbell
patent: 5067276 (1991-11-01), Brandt, Sr.
Renner David L.
Renner Murry E.
Cohen Curtis
Dorner Kenneth J.
Rein Phillip A.
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