The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 09, 1980
Filed:
Nov. 20, 1978
Wallace Clark, Indianapolis, IN (US);
Other;
Abstract
A hydraulic motor is disclosed using the helical gear elements as taught by Moineau in his early patents, as for example, U.S. Pat. No. 1,892,217 of Dec. 27, 1932. In the present invention the internal element of the Moineau pair is held against gyration but is permitted to rotate freely. The outer member of the Moineau gear pair is caused to turn without gyration when fluid is pumped through the motor. Compared with conventional Moineau gear pair motors, the volume of liquid to be pumped through the motor is reduced by 50% and therefore the fluid may be pumped at a higher pressure than is available with current Moineau gear pair motors. If the pressure is doubled, then the torque put out by the motor is doubled. While the device is useful in various applications, it is of particular value in connection with well drilling down-hole motors.