Piston arrangement
AssigneeLincoln GmbH
InventorsZdravko Paluncic, Ralf Trinkel
Life of this patent
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Abstract
A piston arrangement is disclosed for metering valves, flow-rate sensors or hydraulic motors. The piston arrangement comprises a housing, at least one recess in the housing, and a first piston sealed and movable in the at least one recess of the housing. A recess is provided in the first piston, and a flow passage extends through the first piston. A second piston is movable in the recess of the first piston. A sealing surface is provided on the second piston, and a valve seat is provided on the first piston against which the sealing surface on the second piston can be pressed in such a way that the second piston can be moved in the first piston between a position which opens the flow passage through the first piston and a position which shuts off the flow passage through the first piston.
Claims16
A piston arrangement for metering valves, flow-rate sensors, or hydraulic motors, said piston arrangement comprising:
- a housing;
- at least one recess in the housing;
- a first piston sealed and movable in the at least one recess of the housing;
- a recess in the first piston;
- a flow passage through the first piston;
- a second piston movable in the recess of the first piston;
- a sealing surface on the second piston;
- and
- a valve seat on the first piston against which the sealing surface on the second piston is selectively pressed in such a way that the second piston is movable relative to the first piston between a position which opens said flow passage through the first piston and a position which shuts off said flow passage through the first piston;
- the housing forming an injector body which is adapted to be connected to a manifold, said injector body having a first opening for connecting a first chamber to a supply line in the manifold and an outlet opening which is adapted to be closed by a relief valve and which is connected, in turn, to a connection provided in the manifold.
A piston arrangement for metering valves, flow-rate sensors, or hydraulic motors, said piston arrangement comprising:
- a housing;
- at least one recess in the housing;
- a first piston sealed and movable in the at least one recess of the housing;
- a recess in the first piston;
- a flow passage through the first piston;
- a second piston movable in the recess of the first piston;
- a sealing surface on the second piston;
- and
- a valve seat on the first piston against which the sealing surface on the second piston is selectively pressed in such a way that the second piston is movable relative to the first piston between a position which opens said flow passage through the first piston and a position which shuts off said flow passage through the first piston;
- the second piston having, at least in some regions, an outer surface whose diameter corresponds approximately to the inner diameter of the recess in the first piston and on which at least one helical groove is provided.
A piston arrangement for metering valves, flow-rate sensors, or hydraulic motors, said piston arrangement comprising:
- a housing;
- at least one recess in the housing;
- a first piston sealed and movable in the at least one recess of the housing;
- a recess in the first piston;
- a flow passage through the first piston;
- a second piston movable in the recess of the first piston;
- a sealing surface on the second piston;
- a valve seat on the first piston against which the sealing surface on the second piston is selectively pressed in such a way that the second piston is movable relative to the first piston between a position which opens said flow passage through the first piston and a position which shuts off said flow passage through the first piston, the first piston defining in the housing first and second chambers which can be brought into flow connection with each other through movement of the second piston;
- and
- an injector closure screw screwed into the housing on the side of the second chamber, an adjustment screw screwed into the closure screw, and an indicator pin connected to the first piston and guided by said adjustment screw.
Dependencies are inferred from the claim text.