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US 2008/0075606 A1Published application
Pump Apparatus
AssigneeSupavac Pty Ltd
InventorMark Krohn
Life of this patent
Estimating the term…
Abstract
A Pump consisting of a pressure vessel (50), an inlet nozzle (51), an ejector nozzle (52) by which vacuum and pressur are applied, and an outlet nozzle (53). The inlet and outlet nozzles (51, 52) are selectively closed by interconnected knife gate valves, operated in tandem by a pneumatic cylinder whereby when one valve is closed, the other is open an vice-versa. An ejector valve located in the ejector nozzle (52) alternately creates vacuum and generate air flow through the vessel (50). The air from the ejector is introduced into the discharge line after closure of the outlet valve.
Claims19
Pump apparatus including:
- a housing having an inlet for admitting to the housing a material to be pumped, and a delivery outlet;
- a knifegate valve on each of said inlet and said outlet said inlet and outlet valves being mechanically interconnected to effect the cyclic operation of the respective valves by a common actuator;
- control means adapted to selectively operate said actuator to open and close respective said valves;
- an ejector assembly associated with said inlet and having a compressed air driven venturi and an ejector valve after the venturi being opened by said control means to reduce the pressure in said housing via said venturi and inlet to admit said material to said housing when said inlet valve is opened, and being closed by said control means to pressurize the housing to effect discharge from the housing when said outlet valve is open, said control means being adapted to close said inlet gate means on admission of a selected charge of said material to said housing.
1 more element
Pump apparatus including:
- a housing having an inlet for admitting to the housing a material to be pumped, and a delivery outlet;
- a knifegate valve on each of said inlet and said outlet, the inlet and outlet valves being cyclically operable by an actuator to open and close respective said inlet and outlet valves under control of control means;
- an ejector assembly associated with said inlet and having a compressed air driven venturi and an ejector valve after the venturi being opened by said control means to reduce the pressure in said housing via said venturi and inlet to admit said material to said housing when said inlet valve is opened, and being closed by said control means to pressurize the housing to effect discharge from the housing when said outlet valve is open, said control means being adapted to close said inlet gate means on admission of a selected charge of said material to said housing, the waste air from said venturi being vented into the product line downstream of the closed said outlet valve.
Dependencies are inferred from the claim text.