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US 6,594,954 B1Granted
Mine door installation
AssigneeJack Kennedy Metal Products & Buildings, Inc.
InventorsWilliam R. Kennedy, John M. Kennedy
Life of this patent
Estimating the term…
Abstract
A power mine door installation utilizing compressed air from the compressed air system available in the mine as the power source for a hydraulic door-operating mechanism.
Claims5
A power mine door installation for a doorway in a mine, said mine having a compressed air system therein, said installation comprising:
- a door component swingable between open and closed positions in the doorway;
- a hydraulic instrumentality for operating the door component;
- a pump for supplying hydraulic fluid under pressure to said hydraulic instrumentality for operation thereof to operate the door component;
- an air motor for driving the pump;
- and
- a compressed air circuit for supplying the air motor with compressed air from said compressed air system in the mine.
3 more elements
A power mine door installation for a doorway in a mine, said mine having a compressed air system therein, said installation comprising
- a pair of door leafs swingable between open and closed position in the doorway;
- a pair of hydraulic cylinders for operating the door leafs;
- a pump for supplying hydraulic fluid under pressure to said cylinders for operation thereof to operate the door leafs;
- an air motor for driving the pump;
- and
- a compressed air circuit for supplying the air motor with compressed air from said compressed air system in the mine.
3 more elements
Dependencies are inferred from the claim text.