Pumps – Expansible chamber type – Moving cylinder
Patent
1990-03-01
1991-09-03
Smith, Leonard E.
Pumps
Expansible chamber type
Moving cylinder
417469, 222383, F04B 1902
Patent
active
050449001
ABSTRACT:
A positive displacement shuttle pump having a cylinder with axially displaced and mutually isolated inlet and outlet portions; a shuttle piston having a reservoir for accepting pressurized feed from the inlet port in the feed cycle and for dispensing feed to the outlet port in the dispensing cycle; a displacement piston extending longitudinally in the shuttle piston and communicating with the reservoir; an actuator for extending the displacement piston into the reservoir to pressurize the feed and urge the feed through the outlet port during the dispensing cycle; the displacement piston is responsive to the pressurized feed in the reservoir for retracting during the feed cycle; the displacement piston driving the shuttle piston through the feed and dispensing cycles.
REFERENCES:
patent: 1184779 (1916-05-01), Shaw
patent: 1252875 (1918-01-01), Ashmusen
patent: 1699236 (1929-01-01), Goldrick
patent: 2274241 (1942-02-01), Lemanski
patent: 2410517 (1946-11-01), Muller et al.
patent: 3586129 (1971-06-01), Cass
patent: 4043711 (1977-08-01), Seino
patent: 4646969 (1987-03-01), Sorm et al.
Knight Tool Company, Inc.
Kocharov Michael I.
Smith Leonard E.
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