Stall Control System for Raise Drills and Raise Boring Machines
AssigneeRedpath Canada Limited
InventorsMichael John KELLY, Johannes Gerhardus DAVEL, Stephen John KORSKI, Sean Wayne Louis PENNO
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Abstract
A stall control system for a raise boring machine is provided. In one implementation, the stall control system includes one or more hydraulic control valves connected to thrust cylinders of the raise boring machine to vent pressurize oil from a cap end of the thrust cylinders back to an oil tank or to a rod end of the thrust cylinders. In another implementation, the stall control system includes one or more hydraulic control valves connected to thrust cylinders of the raise boring machine to inject pressurized oil into a rod end of the thrust cylinders to increase pressure on the rod end of the thrust cylinders.
Claims28
A stall control system for a raise boring machine, the stall control system comprising:
- one or more hydraulic control valves connected to thrust cylinders of the raise boring machine to vent pressurized oil from a cap end of the thrust cylinders back to an oil tank or to a rod end of the thrust cylinders.
A method of implementing a stall control system for a raise boring machine, the method comprising:
- connecting one or more hydraulic control valves to thrust cylinders of the raise boring machine;
- and
- venting pressurized oil from a cap end of the thrust cylinders back to an oil tank or to a rod end of the thrust cylinders.
A stall control system for a raise boring machine, the stall control system comprising:
- one or more hydraulic control valves connected to thrust cylinders of the raise boring machine to inject pressurized oil into a rod end of the thrust cylinders to increase pressure on the rod end of the thrust cylinders.
A method for implementing a stall control system for a raise boring machine, the method comprising:
- connecting one or more hydraulic control valves to thrust cylinders of the raise boring machine;
- and
- injecting pressurized oil into a rod end of the thrust cylinders to increase pressure on the rod end of the thrust cylinders.
Dependencies are inferred from the claim text.