Power mine door system

Patent · Tue Aug 31 04:00:00 EDT 1993

OSTI ID:6248150

Kennedy, W R; Kennedy, J M

A power mine door system is described for installation in a passageway in a mine, comprising a door frame adapted to be installed in the passageway to define a generally rectangular doorway, a mine door comprising a pair of generally rectangular door leafs hinged on the door frame at opposite sides of the doorway for swinging between an open position of permit passage through the doorway and a closed position, and power means for opening and closing the door leafs, said power means comprising a pair of hydraulic cylinders mounted on the door frame, each hydraulic cylinder having an extensible and retractable cylinder rod attached to a respective door leaf generally adjacent a respective side of the door frame, said cylinder rod being extensible for opening the door leaf and retractable for closing the door leaf, each hydraulic cylinder being mounted on the door frame in such a manner that the cylinder and its cylinder rod are generally perpendicular to the plane of the doorway when the cylinder rod is extended and the door leaf is open.

• Assignee: Jack Kennedy Metal Products and Buildings, Inc., Taylorville, IL (United States)
• Patent Number(s): US 5240349; A
• Application Number: PPN: US 7-733213
• OSTI ID: 6248150
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
012033 -- Coal
Lignite
& Peat-- Underground Mining-- Mine Environment-- (1987-)
42 ENGINEERING
422000* -- Engineering-- Mining & Underground Engineering-- (1980-)
CONTROL EQUIPMENT
DESIGN
DOORS
EQUIPMENT
HYDRAULIC CONTROL DEVICES
INSTALLATION
MINE ROADWAYS
MINING
OPENINGS
OPERATION
TUNNELS
UNDERGROUND FACILITIES
UNDERGROUND MINING
VENTILATION BARRIERS