Michael Douglas Melton

US Patent:

8491288, Jul 23, 2013

Filed:

Oct 9, 2009

Appl. No.:

12/576298

Inventors:

Terry Lynn Lyons - Bluff City TN, US
Maynard Wayne Marts - Jonesborough TN, US
Michael L. Melton - Greeneville TN, US
Ricky L. Kegley - Greeneville TN, US
Jason Scot Richardson - Chuckey TN, US
John M. Rector - Jonesborough TN, US

Assignee:

Parker Hannifin Corporation - Cleveland OH

International Classification:

F03C 2/00
F03C 4/00
F04C 2/00

US Classification:

418 613, 418 72, 418 75, 418132

Abstract:

A hydraulic motor receives pressurized fluid from a source controlled by a human operator to convert the energy in the hydraulic fluid to a rotational output to propel a drive wheel of a machine. The hydraulic motor includes an end cover, a manifold, a drive assembly, a wear plate, a housing, and an output assembly. The drive assembly includes a rotor with external teeth and a stator with internal teeth formed by rollers having end faces. The pressurized fluid from the source flows through the manifold to the drive assembly and causes rotational and orbital movement of the rotor relative to the stator. The rotational movement of the rotor is transmitted to the drive wheel by the output assembly. A first set of anti-cogging passages and a second set of anti-cogging passages communicate fluid pressure to the end faces in timed relationship to reduce cogging or detenting of the rotational output of the motor.