Pumps – Successive stages – Reciprocating rigid stages
Patent
1994-02-10
1996-04-16
Gluck, Richard E.
Pumps
Successive stages
Reciprocating rigid stages
417266, 417467, F04B 300
Patent
active
055076262
ABSTRACT:
A telescopic manual pump has a first cylinder, a second cylinder received in the first cylinder, a third cylinder received in the second cylinder, a piston slidably received in the third cylinder and a stem linked to the piston. The first cylinder defines a nozzle through a first end and an opening through a second end. The second cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A first limit is attached to the second end of the first cylinder for retaining the piston of the second cylinder in the first cylinder. The third cylinder defines a first opening through a first end, a second opening through a second end and a piston about the second end thereof. A second limit is attached to the second end of the second cylinder for retaining the piston of the third cylinder in the first cylinder. The piston has first and second disks spaced from each other. A plurality of holes are defined through the first disk of the piston. A sealing ring is slidably mounted between the first and second disks of the piston. A third limit is attached to the second end of the third cylinder for retaining the piston, which is linked to the stem, in the third cylinder.
REFERENCES:
patent: 842142 (1907-01-01), Funck
patent: 1381115 (1921-06-01), Gassenhube
patent: 1414283 (1922-04-01), Jewell
patent: 1424928 (1922-08-01), McClelland
patent: 1447964 (1923-03-01), Coleman
patent: 1481070 (1924-01-01), Shevlin
patent: 1491388 (1924-04-01), Foster
patent: 1539486 (1925-05-01), Holstein
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