Power mine door system

Patent · Tue Aug 31 00:00:00 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
• Resource Relation: Patent File Date: 19 Jul 1991
• Country of Publication: United States
• Language: English

Related Subjects

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