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Fluid-powered linear motor with rotary pistons and motion rectifier

United States Patent

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10,767,670
September 8, 2020
View the Complete Patent at the US Patent & Trademark Office
A fluid-powered linear motor with rotary pistons is disclosed. An application is for a downhole motor but it could be used in other applications. Rotational pistons provide increased torque generation as the torque generated is proportional to motor length. Since downhole drills are long (generally up to a maximum length of 30 ft.), a high-torque motor can be produced using this method. A pressurized fluid is used to drive the piston assemblies to produce bit shaft power. This concept employs rotary pistons and a mechanical rectifier to convert the rotational reciprocation produced by a reciprocating rotational piston into continuous rotary motion.
16/ 153,265
October 5, 2018
1/1
F16B 15/02 (20060101)F16H 25/22 (20060101)F15B 15/02 (20060101)F16H 49/00 (20060101)F01B 11/04 (20060101)E21B 4/02 (20060101)
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was developed under Contract No. DE-NA0003525 between the United States Department of Energy and National Technology & Engineering Solutions of Sandia, LLC, for the operation of the Sandia National Laboratories.