Eaton Corporation

John C Bierlein

Alan R Davis

Marcel Amsallen

Wayne B Wenker

Douglas C Gooch

Mark L Lanting

Thomas A Michelhaugh

Jerry L Yoho

An improved splash-type lubrication system ( ) for a change-gear transmission ( ). A closely fitting gear shroud ( ) is provided with upper openings ( ) allowing the countershaft and main shaft gears to mesh and directs splashed lubricant ( ) toward needle bearings ( ) supporting main shaft gears ( ) on the main shaft ( ).

Gear isolation shroud for transmission

A shift yoke (10) defining contact pads (18, 20) for axially engaging contact surfaces (22) on a relatively rotating clutch member (12). Inlet ramps (34, 36) are provided at the upstream ends of the contact pads to provide an inlet (36) for directing lubricant between the axially engaging surfaces.

Shift yoke

A roller gerotor device is disclosed including an outer rotor (39) and an inner rotor (31), and a plurality of rollers (37) serving as teeth. The device includes a housing means (11,45,47) defining a first wear surface (67) disposed axially adjacent first axial end surfaces (55,63) of the rotors. The first wear surface cooperates with one of the rotors to define an annular fluid passage (83) and a plurality of fluid grooves communicating with the passage (83) and extending radially outward. At least a terminal portion of each of the grooves (87) is adjacent an axial end surface (59) of each roller member (37) as the rotors rotate. Each of the terminal portions (95) becomes progressively shallower in the direction of rotation of the rotors, thus building up fluid pressure in the fluid groove (87) to prevent gouging or galling of the roller end surface against the adjacent wear surface (67).

Roller gerotor device and pressure balancing arrangement therefor

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Shelby Township, MI, United States of America

John C Bierlein