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US 6,425,820 B1Granted
Mine door power drive system
AssigneeJack Kennedy Metal Products & Buildings, Inc.
InventorsWilliam R. Kennedy, John M. Kennedy
Life of this patent
Estimating the term…
Abstract
A mine door system including at least two doors positioned in a mine passageway in spaced relation forming an airlock. The doors include at least one leaf movable between open and closed positions to allow passage into and out of the airlock. A control system controls operation of leaf movement actuators such that in normal operation, at least one door is always closed to control flow of air in the mine. A power source is included to effect movement of the leafs by the actuators.
Claims41
A power operated mine door system forming an airlock space in a mine with at least one door of the mine door system being on a fresh air side of the mine door system, said mine door system comprising:
- a plurality of doors mounted in a mine passage in spaced apart relation, each door including at least one leaf mounted for moving between open and closed positions, said doors forming an airlock with the airlock space therebetween, at least one door being a return air side door and at least one door being a fresh air side door;
- a single source of pressurized fluid, said source including only one non-explosion proof motor and only one fluid pump driven by the motor, said motor being positioned in the mine passage on the fresh air side of the fresh air side door;
- a plurality of actuators each operably connected to at least one leaf and to the single source of pressurized fluid to selectively apply driving force to at least one leaf and thereby move at least one leaf to at least one of said open and closed positions;
- and
- a control system operably connected to the actuators for selectively allowing pressurized fluid to flow to each said actuator for applying said driving force to a selected at least one leaf for moving it to at least one of its open and closed positions.
2 more elements
A door system for a mine, said door system comprising:
- at least one leaf mounted for pivotal movement between open and closed positions;
- a power actuator operably connected to said leaf and operable to move said leaf between said open and closed positions;
- a power source operably connected to said power actuator to provide pressurized fluid thereto to effect operation of said power actuator and thereby move said leaf between said open and closed positions;
- a control system operably connected to said power source and said actuator to effect selective extension and retraction of the power actuator and to effect locking of said leaf in said open and closed positions and at positions therebetween,
- said control system including a timer operable to lock said leaf in position in response to the leaf exceeding a preset time period to move to the closed position or to the open position.
2 more elements
A power operated mine door system forming an airlock space between a high pressure side and a low pressure side of the mine door system, said mine door system comprising:
- a plurality of doors mounted in a mine passage in spaced apart relation, each of said doors including at least one leaf mounted for moving between open and closed positions, said doors forming an airlock with the airlock space therebetween;
- a single source of pressurized fluid, said source including at least one motor and at least one fluid pump driven by said motor, said source being positioned on one side of one of said doors;
- a plurality of actuators each operably connected to at least one leaf and to the single source of pressurized fluid to selectively apply driving force to at least one leaf and thereby move the leaf between said open and closed positions and to selectively retain the respective leaf in its open position and closed position;
- and
- a single control system operably connected to the actuators and said source for selectively allowing pressurized fluid to flow to the actuators for applying said driving force to at least one leaf for moving it to at least one of its open and closed positions, said control system including an interlock device including a sensor operably associated with each said leaf to provide a signal that the respective leaf is closed and prevent opening of the leaf in one door if any leaf in another door is not closed.
2 more elements
A power operated mine door system forming an airlock space between a high pressure side and a low pressure side of the mine door system, said mine door system comprising:
- a plurality of doors mounted in a mine passage in spaced apart relation, each door including a leaf mounted for moving between open and closed positions, said doors forming an airlock with the airlock space therebetween;
- a source of pressurized fluid, said source including at least one motor and at least one fluid pump driven by a said motor, said source being positioned on one side of one of said doors;
- a plurality of actuators, each actuator operably connected to the leaf and to the source of pressurized fluid to selectively apply a driving force to the leaf and thereby move the leaf between said open and closed positions and selectively retain the leaf in its open position and closed position;
- and
- a single control system operably connected to the actuators and said source for selectively allowing pressurized fluid to flow to the actuators for applying said driving force to the leaf in one of said doors for moving it to at least one of its open and closed positions, said control system including an interlock device including a sensor operably associated with each of said leafs to provide a signal that the respective leaf is closed and prevent opening of the leaf in one of said doors if any leaf in another door is not closed, said single control system including a signal receiving portion mounted in a single housing enclosing the signal receiving portion therein.
2 more elements
A power operated mine door system forming an airlock space in a mine with at least one door of the mine door system being on a fresh air side of the mine door system, said mine door system comprising:
- a plurality of doors mounted in a mine passage in spaced apart relation, each door including at least one leaf mounted for moving between open and closed positions, said doors forming an airlock with an airlock space therebetween, at least one door being a fresh air side door with fresh air on at least one side of a said fresh air side door;
- a single source of pressurized fluid, said source including only one non-explosion proof motor and only one fluid pump driven by the motor, said motor being positioned in the mine passage on a fresh air side of a said fresh air side door;
- a plurality of actuators each operably connected to at least one leaf and to the single source of pressurized fluid to selectively apply driving force to at least one leaf and thereby move at least one leaf to at least one of said open and closed positions;
- and
- a single control system operably connected to the actuators for selectively allowing pressurized fluid to flow to each said actuator for applying said driving force to a selected at least one leaf for moving it to at least one of its open and closed positions.
2 more elements
A door system mounted in a mine passageway, said door system comprising:
- a first door including a leaf mounted for pivotal movement between open and closed positions;
- a power actuator operably connected to said leaf for moving said leaf between said open and closed positions;
- a power source operably connected to said power actuator to provide pressurized fluid thereto to effect operation of said power actuator and thereby move said leaf between said open and closed positions;
- a control system operably connected to said power source and said actuator to effect extension and retraction of the power actuator, the control system being adapted to regulate speed of extension and retraction for regulating leaf closing and opening speed and to inhibit uncontrolled movement of the leaf during opening and closing due to air pressure.
1 more element
A door system mounted in a mine passageway, said door system comprising:
- a leaf mounted for pivotal movement between open and closed positions;
- a piston cylinder operably connected to said leaf for moving said leaf between said open and closed positions;
- a power source operably connected to said cylinder to provide pressurized fluid thereto to effect operation of said piston cylinder and thereby move said leaf between said open and closed positions;
- a control system operably connected to said power source and said actuator to effect selective extension and retraction of the cylinder and effect locking of said leaf in said open and closed positions and at positions therebetween,
- said control system including a dump valve connected to said cylinder and operable to selectively allow flow of fluid from said cylinder thereby selectively allowing movement of the leaf from its locked position.
2 more elements
Dependencies are inferred from the claim text.