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
Plant disease control composition and its use
Display screen with an animated graphical user interface
Potential separation for filling level radar
Bioelectric battery for implantable device applications
Data storage device with surface ornamentation
Asynchronous distributed de-duplication for replicated content addressable storage clusters
  Randomly Featured Patents
Ultrasonic scaler
Television set
Method for calculating color correction conditions, a method for determining an exposure amount for printing, an image processing apparatus, a printing exposure apparatus and a storage medium
Mesoporous FCC catalyst formulated with gibbsite and rare earth oxide
Rotary device of a projector
Interface circuit provided between a compound semiconductor logic circuit and a bipolar transistor circuit
System and method for automatic verification of the understandability of speech
Light emitting diode device and manufacturing method therof
Name service system and method for automatic updating on interconnected hosts