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
Keypad assembly for electronic devices
Systems and methods for classifying electronic information using advanced active learning techniques
Moving picture decoding device and moving picture decoding method
Fine grain voltage scaling of back biasing
Circuit board and display panel assembly having the same
Control service for relational data management
Method for programming non-volatile memory device and apparatuses performing the method
  Randomly Featured Patents
Low risk deployment airbag cushion
Rinsing system used in a photoresist coater with capability to avoid a reversed pressure effect
Semiconductor integrated circuit device
Retractor assembly and method for surgical procedures
Operation of a cryogenic air separation unit which intermittently uses air feed as the repressurization gas for a two bed PSA system
Automated grouping of image and other user data
Method for measuring timing asymmetry in a magnetic storage system
Automatic route selection of a private telephone network path on the basis of a public telephone network number
Slurry composition for a chemical mechanical polishing process and method of manufacturing a semiconductor device using the slurry composition
Method of manufacturing semiconductor devices having solder bumps with reduced cracks