Hydraulic and earth engineering – Earth treatment or control – Ground stabilization or reinforcement
Patent
1992-07-21
1993-06-29
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
Ground stabilization or reinforcement
49123, 49368, 52217, 405132, 4051501, E21D 900, E21F 100
Patent
active
052228380
ABSTRACT:
A mine door system including a door frame to be installed in a mine passageway to define a generally rectangular doorway. A mine door is defined by a pair of generally rectangular door leafs which are hinged on the door frame at opposite sides of the doorway for swinging between an open position to permit passage through the doorway and a closed position in which the door leafs are generally coplanar and close the doorway. The door leafs are so dimensioned that there is a substantial vertical gap between the door leafs when they are closed to accommodate convergence of side walls of the passageway. A relatively wide vertical sealing flap is secured to one of the door leafs for overlapping a face of the other door leaf when the door is closed for covering the gap between the door leafs. A power mechanism for opening and closing the door leafs is operable to control the sequence in which the door leafs close so that the door leaf carrying the sealing flap closes after the other door leaf for ensuring that the sealing flap closes against the face of the other door leaf.
REFERENCES:
patent: 1468053 (1923-09-01), Townsend
patent: 1544751 (1925-07-01), Haynes et al.
patent: 1798392 (1931-03-01), Adams, Jr. et al.
patent: 1891051 (1932-12-01), Neese
patent: 3438147 (1969-04-01), Lander
patent: 4064924 (1977-12-01), Catlett
patent: 4084347 (1978-04-01), Brown
patent: 4543746 (1985-10-01), Racca
patent: 4583324 (1986-04-01), Storz et al.
patent: 4653229 (1987-03-01), Feucht et al.
patent: 4911577 (1990-03-01), Kennedy et al.
Kennedy John M.
Kennedy William R.
Jack Kennedy Metal Products and Buildings
Taylor Dennis L.
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