Plunge valve
AssigneeAktiebolaget Electrolux
InventorsDan Nilsson, Ove Donnerdal
Life of this patent
Estimating the term…
Abstract
A plunge valve for closing and for opening a connection in a hydraulic conduit comprises a plunge (37) which is slidably movable in the hydraulic conduit (5, 5A) under the influence of the pressure in a section (5A) of the conduit on the inlet side of said conduit adjacent to the plunge between a first, open position, when the pressure in said section (5A) is high, in which position the plunge is withdrawn and communication is established, and a second, closed position, in which the pressure in said section is low, in which position the plunge shuts off said connection.
Claims15
A hydraulic motor assembly of the type which includes an inlet port, an outlet port, and a source of pressurized hydraulic medium, said hydraulic motor comprising:
- a motor body containing a motor chamber;
- an inlet chamber and an outlet chamber connected to the motor chamber;
- an inlet conduit interruptably hydraulically connected to the inlet chamber of the motor chamber and an outlet conduit hydraulically connected to the outlet chamber;
- a bypass conduit interruptably hydraulically connected between said inlet conduit and said outlet conduit having a main valve therewithin;
- said main valve including a valve body which is movable from a closed position, thereby interrupting said bypass conduit and causing hydraulic medium to flow through said inlet conduit, inlet chamber, and motor chamber and driving a hydraulic motor positioned within said motor chamber, to an open position thereby opening said bypass conduit and causing hydraulic medium to flow through said bypass conduit;
- a plunge valve comprising a plunge which is slidably movable within a plunge chamber under the influence of the hydraulic pressure in a section of said inlet conduit located between said bypass conduit and said inlet chamber, said plunge being shiftable between first and second positions, said first position occurring when the valve body of said main valve is in its closed position thereby interrupting said bypass conduit and allowing the pressure in said section of the inlet conduit to increase to a high magnitude which then prevents said plunge from entering into the inlet conduit by forcing said plunge to remain in the plunge chamber;
- said second position occurring when the valve body of the main valve is in its open position thereby opening said bypass conduit and causing the pressure in said section of the inlet conduit to decrease to a low magnitude which then allows said plunge to enter into the inlet conduit thereby interrupting the flow of hydraulic medium into said inlet chamber;
- and a resilient biasing member which assists in displacing said plunge from said first position within said plunge chamber to said second position.
Dependencies are inferred from the claim text.