Support prop with integrated pressure limiting valve and nailed pipes
AssigneeRichard Voss Grubenausbau GmbH
InventorRichard Voss
Life of this patent
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Abstract
A compact support prop having a pressure limiting valve with a very high flow volume forming a prop head as a valve housing. The pressure limiting valve is integrated into the prop head. Thus, insertion speeds of more than 3 meters per second can be achieved. The drawing and filling valve consists of one or possibly two pilot-controlled check valves which can be easily attached to an outer side of the internal prop. It allows for a quick setting and drawing after removal of the released pressure medium. The released pressure medium flows off via the connection of the pilot-controlled check valve. The connection is provided as a setting gun connection and the released pressure medium can be returned to the inside by this connection.
Claims13
A support prop for underground mining comprising telescopic external and internal props, a crown head connected to the internal prop, a collar ring and a sole plate also connected to the internal prop, a pressure limiting valve integrated into the head, a filling and drawing valve positioned on the internal prop, wherein the external prop, the sole plate, the internal prop and the crown head are nailed, a piston movable within the external prop, the internal prop and the piston having a corresponding screw thread, and wherein the filling and drawing valve is a first pilot controlled check valve with two setting gun connections.
Dependencies are inferred from the claim text.