Resources Contact Us Home
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
Semiconductor device, method of manufacturing semiconductor device, and electronic apparatus
Pressure-sensitive adhesive composition for optical films, pressure-sensitive adhesive optical film and image display
Controlling transmission resources in mobile radio systems with dualtransfer mode
Brushless electric motor or generator in shell construction
Mixed reactant flow-by fuel cell
Self-assembling surface coating
Maize variety X00C175
  Randomly Featured Patents
Vane control bearing assembly
Power semiconductor module
Voltage change circuit for a microcomputer
Parasitic helminth venom allergen antigen 5-like genes and proteins
Devices for switching over electrical connections
Method and system for the transparent transmission of data traffic between data processing devices, corresponding computer program product, and corresponding computer-readable storage medium
Fibre-reactive fluorothriazine-group-containing azo dyestuffs
Paving stone
Automatic exposure control system for tomographic applications