Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Downhole motor










Image Number 2 for United States Patent #6230823.

A downhole hydraulic motor consisting of an outer rim having six or eight lobes on the toothed inner surface, a rotor having four or six lobes respectively on the toothed outer surface as well as a number of planetary gears being constantly engaged with both the outer rim and the rotor and dividing the space between the rim and the rotor into a number of working chambers changing their volume with the rotation of the motor. The working fluid is supplied to the working chambers through channels both in the rotor and the side covers, one of which can slide inside the outer rim to allow adjustment of the gap between the ends of the planetary gears and the side covers.








 
 
  Recently Added Patents
System and method for enhanced transaction payment
Modulation of HSP47 expression
Methods for selective reverse mask planarization and interconnect structures formed thereby
Microfluidic system incorporating a metal impregnated nanoporous material in a microfluidic pathway thereof
Isoselective polymerization of epoxides
Synergistic compositions for the treatment of topical viral infections
Method of manufacturing III-nitride crystal
  Randomly Featured Patents
Surgical stapler comprising a staple pocket
Dual stage instrument for scanning a specimen
System and method for estimating the orientation of an object
Plants and seeds of corn variety CV700979
Compact retrofocus wide angle objective
Method and apparatus for reducing tilt angle variations in an ion implanter
Data transfer method, display driving circuit using the method, and image display apparatus
Cortical hearing aid
Semiconductor chip assembly with bumped molded substrate
Spring-loaded ground engaging tool