Resources Contact Us Home
Browse by Category: Main > Industrial
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
8657588 Compression apparatus Feb. 25, 2014
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

  Recently Added Patents
Scanning optical positioning system with spatially triangulating receivers
Subcarrier cluster-based power control in wireless communications
Nanoparticles in a flash memory using chaperonin proteins
Packaging sleeve
Antimicrobial flush solutions
Methods and systems to reduce a number of simulations in a timing analysis
Multi-wired antenna for mobile apparatus
  Randomly Featured Patents
Memory efficient adaptive block coding
Adjustable head assembly for cotton harvester
Award trophy
Fast min*- or max*-circuit in LDPC (low density parity check) decoder
Information processing apparatus and method, program and recording medium
Footwear sole
Beam machining device with reflector comprised of arcs of confocal ellipses
Distributed solution for managing periodic communications in a multi-chassis routing system
Display table
Non-interfering viewing systems for use in catadioptric projection systems