Hydro-gear Limited Partnership

Hydro-gear Limited Parntership

Matthew C Roney

Thomas J Langenfeld

Raymond M Hauser

Shane A Deters

Daryl Smothers

Michael Lee Bennett

Robert E Trimble

J David Pratt

Scott E Windhorst

A drive mechanism comprising a transmission housing with a transmission disposed therein and driven by a prime mover. A first axle drive mechanism is disposed in a first housing and driven by a first output shaft that extends from a first end of the transmission housing. A first drive axle is driven by the first axle drive mechanism and drives a first wheel. A second axle drive mechanism is disposed in a second housing and driven by a second output shaft that extends from a second end of the transmission housing. A second drive axle is driven by the second axle drive mechanism and drives a second driven wheel. The transmission housing, the first housing and the second housing at least partially define an operable space. An input shaft is engaged to the transmission extends into the operable space.

Zero turn transaxle

A transaxle including a hydrostatic transmission mounted in a transmission housing and having a pair of hydraulic pumps and hydraulic motors operatively connected together. First and second axle housings are mounted on opposite ends of the transmission housing, with output axles mounted in the axle housings, where each output axle is connected to its respective hydraulic motor through a gear train in the axle housing. A brake is provided on each axle housing to directly engage one of the gears in the gear train to provide a braking force for the output axles.

A valve for use in regulating the flow of fluid between a first and a second fluid side is provided. The valve comprises a valve body and an aperture extending through the valve body. The aperture comprises an inner wall, a first aperture diameter at the first end of the aperture and a second aperture diameter at the second end of the aperture. The valve further comprises a first valve insert positioned in the aperture with a first insert diameter and a first mating feature. The first insert diameter is larger than the first aperture diameter. The valve further comprises a second valve insert having a first width, a second width and a second mating feature. The first width is larger than the second aperture diameter. The first mating feature cooperates with the second mating feature to engage the first valve insert to the second valve insert.

Combined check valve and pressure relief valve

A transaxle including a hydrostatic transmission mounted in a transmission housing and having a pair of hydraulic pumps and hydraulic motors operatively connected together through a center section mounted in the housing. First and second axle housings are mounted on opposite ends of the transmission housing, with output axles mounted in the axle housings and connected to the respective hydraulic motors, and the output axles are offset so that the axes of rotation of the axles do not intersect any portion of the transmission housing.

A hydraulic motor assembly having a hydraulic motor mounted in a motor housing and an axle mounted in a separate axle housing. A ring gear and a port block are mounted between the motor housing and the axle housing. A swash plate is mounted in the motor housing and is engaged to the hydraulic motor to control the hydraulic output thereof, and the swash plate is movable between at least a first position and a second position.

Adjustable hydraulic motor apparatus

A combination check valve and pressure relief valve is provided for use in regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, a check poppet attached to the valve insert, and a check spring positioned between the valve insert and the valve body. In addition, a relief spring and a relief poppet may be positioned within a cavity formed by the valve insert and secured in position by the check poppet. The combination of the valve insert and the check poppet is adapted to move relative to the valve body and against the force of the check spring to permit fluid to pass from the first fluid side to the second fluid side, and the relief poppet is adapted to move relative to the check poppet against the force of the relief spring to allow fluid to pass from the second fluid side to the first fluid side.

A combination check valve and pressure rise rate valve is provided for regulating the flow of fluid between a first fluid side and a second fluid side. The valve may include a valve body, a valve insert positioned within an aperture of the valve body, and a check poppet attached to the valve insert. In addition, the valve may include a cylinder positioned within the valve insert, a piston slidably positioned within the cylinder, a spring positioned between the cylinder and the valve insert, and an accumulator formed between the cylinder and the piston.

Combination check valve and pressure rise rate valve

A hydraulic drive apparatus having a center section located in a housing includes a hydraulic pump and motor disposed thereon and in fluid communication with a hydraulic porting system in the center section. The pump is driven by an input shaft extending out of the housing and the motor drives an output shaft that is generally perpendicular to the input shaft. A bypass actuator extends into the center section perpendicular to both the input shaft and the output shaft. Rotation of the bypass actuator acts to lift the hydraulic motor from the center section to break the hydraulic interface between the hydraulic motor and the hydraulic porting system. The center section may include a second pump and motor with a second hydraulic porting system and a second bypass actuator.

Bypass mechanism for a hydraulic drive apparatus

A hydraulic drive apparatus having a pair of hydraulic pumps and a pair of hydraulic motors mounted on a common center section in a housing is disclosed. Each hydraulic motor is engaged to an adjustable swash plate located in the transmission housing for adjusting the fluid displacement thereof and an actuator mechanism for adjusting the position of the swash plate. Separate axle housings are mounted on the ends of the transmission housing for housing output axles that are operatively connected to the output shafts of the respective hydraulic motors.

A hydraulic motor assembly having a motor and gear reduction set mounted in a housing having a motor sump and a gear sump. The housing may be formed of separate components, including the external surface of the ring gear and the hydraulic motor port block. A case drain comprising multiple passages permits hydraulic fluid to pass from both the motor sump and from the gear sump to an external sump.

Hydraulic motor apparatus

A transaxle comprised of a hydrostatic transmission mounted in a transmission housing and having a pair of hydraulic pumps and hydraulic motors operatively connected together through a center section mounted in the housing. First and second axle housings are mounted on opposite ends of the transmission housing, with output axles mounted in the axle housings and connected to the respective hydraulic motors.

A hydraulic motor assembly having a motor and gear reduction set mounted in a housing. The housing may be formed of separate components, including the external surface of the ring gear and the hydraulic motor port block. The motor assembly may also include pressure relief valves or neutral valves in the motor port block and a brake assembly mounted in the port block or on the motor housing to provide braking for the output axle.

Growing community of inventors

Sullivan, IL, United States of America

Matthew C Roney