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Class Information
Number: 417/265
Name: Pumps > Successive stages > Reciprocating rigid stages > Relatively movable
Description: Apparatus in which the successive pumping members are capable of or constrained to move relative to one another incident to the pumping operation.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7189320 |
Pump, pump for liquid chromatography, and liquid chromatography apparatus |
Mar. 13, 2007 |
| 7178592 |
Closed loop multiphase underbalanced drilling process |
Feb. 20, 2007 |
| 7063785 |
Pump for liquid chromatography |
Jun. 20, 2006 |
| 7063513 |
Liquid chromatograph pump with dual cylinders and dual plungers |
Jun. 20, 2006 |
| 6027312 |
Hydraulic pressure supply pump with simultaneous directly actuated plungers |
Feb. 22, 2000 |
| 5888054 |
Fuel pump having dual profile cam ring for driving low and high pressure reciprocating plungers |
Mar. 30, 1999 |
| 5688110 |
Fuel pump arrangement having cam driven low and high pressure reciprocating plunger pump units |
Nov. 18, 1997 |
| 5078580 |
Plural-stage gas compressor |
Jan. 7, 1992 |
| 5020973 |
Air compressor shroud |
Jun. 4, 1991 |
| 4924671 |
Controlled series high-pressure intensifiers for hydraulic press cylinded circuit |
May. 15, 1990 |
| 4915594 |
Improved compressor crankshaft |
Apr. 10, 1990 |
| 4883409 |
Pumping apparatus for delivering liquid at high pressure |
Nov. 28, 1989 |
| 4874297 |
Radial pump |
Oct. 17, 1989 |
| 4854825 |
Multi-stage vacuum pump |
Aug. 8, 1989 |
| 4810168 |
Low pulsation pump device |
Mar. 7, 1989 |
| 4808077 |
Pulsationless duplex plunger pump and control method thereof |
Feb. 28, 1989 |
| 4801250 |
Valve structure for a compressor |
Jan. 31, 1989 |
| 4797207 |
Apparatus for controlling a pump to account for compressibility of liquids in obtaining steady flow |
Jan. 10, 1989 |
| 4761118 |
Positive displacement hydraulic-drive reciprocating compressor |
Aug. 2, 1988 |
| 4681513 |
Two-stage pump assembly |
Jul. 21, 1987 |
| 4643651 |
Constant flow rate liquid pumping system |
Feb. 17, 1987 |
| 4600365 |
Displacement pump for low-pulsation delivery of a liquid |
Jul. 15, 1986 |
| 4597717 |
Two-stage fluid pump |
Jul. 1, 1986 |
| 4556367 |
Solvent delivery system |
Dec. 3, 1985 |
| 4552513 |
Multiple piston pump control |
Nov. 12, 1985 |
| 4516913 |
Multistage drum compressor |
May. 14, 1985 |
| 4508490 |
Two stage manual air pump |
Apr. 2, 1985 |
| 4445484 |
Mechanical fuel injection devices, mainly for diesel engines |
May. 1, 1984 |
| 4389163 |
Pressure booster system for fluids |
Jun. 21, 1983 |
| 4352636 |
Dual piston pump |
Oct. 5, 1982 |
| 4349321 |
Liquid dispensing systems |
Sep. 14, 1982 |
| 4333977 |
Wear-resistant article |
Jun. 8, 1982 |
| 4245963 |
Pump |
Jan. 20, 1981 |
| 4236877 |
Highly accurate low volume metering pump |
Dec. 2, 1980 |
| 4165205 |
Multi-stage pump |
Aug. 21, 1979 |
| 4067666 |
Concrete pumping apparatus |
Jan. 10, 1978 |
| 4018545 |
Mix blending pump |
Apr. 19, 1977 |
| 3961861 |
Fuel pumping apparatus |
Jun. 8, 1976 |
| 3955930 |
Automatic dilutor having coupled diluent and reagent plungers |
May. 11, 1976 |
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