Pumps – Diverse pumps – Priming and venting
Patent
1974-01-14
1976-01-06
Husar, C. J.
Pumps
Diverse pumps
Priming and venting
417245, 417382, 417383, 417511, 417539, 137529, F04G 2304, F04B 1700, F04B 908
Patent
active
039307565
ABSTRACT:
A metering pulse pump for metering an additive liquid into a liquid carrier under high pressure. A high-pressure, rapidly reciprocating piston pump is provided at its outlet end with a pressure-relief valve including a spring pressure control permitting the valve to open under varying pre-set pressure differentials across the valve. A diaphragm pump having first and second chambers separated by a diaphragm is provided with one of the chambers communicating directly with the outlet of the piston pump upstream of the pressure-relief valve, liquid carrier emitted under pressure from the piston pump serving to drive the diaphragm pump in a pumping stroke, the second chamber of the diaphragm pump having inflow and outflow ports with respective check valves permitting only inflow and outflow of an additive liquid into and out of the second chamber. The first and second chambers of the diaphragm pump are communicated through a manually closable bleeder duct having a check valve permitting flow only from the first chamber to the second chamber when the duct is open. The length of a diaphragm pumping stroke corresponding to a rapid piston pump stroke is controlled by the pressure differential setting of the pressure-relief valve.
REFERENCES:
patent: 3032060 (1962-05-01), Huffman
patent: 3121373 (1964-02-01), Murphy et al.
patent: 3235129 (1966-02-01), Kruckeberg
patent: 3450053 (1969-06-01), McCulloch
patent: 3663122 (1972-05-01), Kitchen
patent: 3680981 (1972-08-01), Wagner
patent: 3692433 (1972-09-01), Finger
patent: 3809508 (1974-05-01), Uchiyama
Cat Pumps Corporation
Gluck Richard E.
Haller James R.
Husar C. J.
Palmatier H. Dale
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