Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
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
Device for preparing a body fluid for a bacteriological analysis
Selecting modulation and coding scheme in the presence of interference
Compact light shield for flash photography
System and method for combining different tablets into a pouch
Downhole telemetry system
Maize hybrid X95C382
PVD coated tool
  Randomly Featured Patents
Dual hydraulic motor drive system
Phenolfree stabilization of polyolefins
Diamond growth
Process and device for automatically controlling the thrust of at least one engine of an aircraft during a phase of horizontal flight at stabilized speed
Radar system having single circularly polarized antenna
Valve key alignment assembly for curb stop box
Data sharing apparatus and processor for sharing data between processors of different endianness
Configuration of a hand vacuum cleaner
Stabilized ascorbic acid derivatives
Reaction of formaldehyde in butynediol