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
Method and system for accomplishing user equipment purge
Dispenser
Method and apparatus for diagnosing faults in a hybrid internet protocol network
Event-associating software application for accessing digital media
Unified recovery
Communicating channel state information using predictive vector quantization
Active constant power supply apparatus
  Randomly Featured Patents
Laser ablation electrospray ionization (LAESI) for atmospheric pressure, in vivo, and imaging mass spectrometry
Automated third party verification system
Screen device for paper material
Repeater for transmission lines
Grounding clip for electrical fixtures
Bulk group VIII/group VIB metal catalysts and method of preparing same
Optical information medium
Backhoe stabilizer system
Apparatus for manufacturing polycrystalline silicon thin film
Location information recommending apparatus, method, and storage medium