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Class Information
Number: 417/258
Name: Pumps > Successive stages > Reciprocating rigid stages > Reciprocating cylinder and piston
Description: Apparatus in which one of the pumping members comprises a piston which reciprocates in a fixed cylinder and another pumping member comprises a cylinder which moves with respect to a fixed piston encompassed thereby.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 8167591 |
High pressure air pump with reciprocating drive |
May. 1, 2012 |
| 8147215 |
Reciprocating-piston compressor having non-contact gap seal |
Apr. 3, 2012 |
| 8047818 |
High pressure, multiple-stage air pump with valve body inlet port arrangement |
Nov. 1, 2011 |
| 7794660 |
Fluid content monitor |
Sep. 14, 2010 |
| 7674343 |
Method of manufacturing double-glazing, and spacer forming device used for the manufacturing method |
Mar. 9, 2010 |
| 7566206 |
Linear compressor for multi-stage compression |
Jul. 28, 2009 |
| 6702556 |
Multi-cylinder compression pump |
Mar. 9, 2004 |
| 6145311 |
Pneumo-hydraulic converter for energy storage |
Nov. 14, 2000 |
| 5885061 |
Pneumatic pump |
Mar. 23, 1999 |
| 5507626 |
Telescopic pump |
Apr. 16, 1996 |
| 5437542 |
Positive displacement pump system |
Aug. 1, 1995 |
| 4334833 |
Four-stage gas compressor |
Jun. 15, 1982 |
| 4239460 |
Cryogenic pump for liquid gases |
Dec. 16, 1980 |
| 4047845 |
Cyclic pump |
Sep. 13, 1977 |
| 4038961 |
Pneumatic rifle and hand gun |
Aug. 2, 1977 |
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