Fairfield Manufacturing Company, Inc.

Fairfield Mfg. Co., Inc.

Dennis L Buuck

James R Dammon

Kenneth E Carlton

An overload protection device in combination with a prime mover and gearbox transmission supplies torque through a gearbox transmission to a load. An input shaft with is driven by the prime mover and rotates therewith. An external spline on the input shaft mates with an input gear having an internal spline. Upon overload of the gearbox transmission, the input shaft fractures an annular groove in the input shaft. A bushing prevents travel of the portion of the input shaft which is driven by the prime mover and which continues to spin after the fracture.

Overload protection

The present invention employs a hydraulically operable piston and intermediate member to control two clutches in a first planetary gear set. The first planetary gear set includes a first sun gear, a first planet gear, a first planet carrier and an inner ring gear. the first planet carrier includes a gear which drives a second planetary gear set resulting in rotation of a wheel hub. With hydraulic pressure applied to the piston and the intermediate member a first clutch is engaged locking an inner ring gear to a stationary outer ring effecting a high ratio reduction. With no hydraulic pressure applied to the piston and intermediate member a second clutch engages the first sun gear and the first planet carrier locking them together such that the first sun gear, first planet gear, first planet carrier and inner ring gear rotate in unison effecting a low ration reduction. With no hydraulic pressure applied, the first clutch is not engaged.

Two speed alternatively engaging clutch/brake transmission

The present invention employs a hydraulically operable piston and intermediate member to control two clutches in a first planetary gear set. The first planetary gear set includes a first sun gear, a first planet gear, a first planet carrier and an inner ring gear. The first planet carrier includes a gear which drives a second planetary gear set resulting in rotation of a wheel hub. With hydraulic pressure applied to the piston and the intermediate member a first clutch is engaged locking an inner ring gear to a stationary outer ring effecting a high ratio reduction. With no hydraulic pressure applied to the piston and intermediate member a second clutch engages the first sun gear and the first planet carrier locking them together such that the first sun gear, first planet gear, first planet carrier and inner ring gear rotate in unison effecting a low ration reduction. With no hydraulic pressure applied, the first clutch is not engaged.

Two speed high shift transmission

A disengage mechanism for a gear drive including rotatable drive and driven members with one of the members having first splines. A drive actuator having second splines and being connected to rotate with one of the members and axially movable with respect thereto between first and second positions. In the first position the first and second splines are engaged and the drive and driven members are connected to rotate together and in the second position the splines are disengaged and the drive and driven members are disconnected. First means are provided for moving the drive actuator to the first position and second means move the actuator to the second position. The first means include a spring which constantly urges the drive actuator to the first position and the second means comprises a rotatable cam member which positively engages the drive actuator to move it to the second position. Means are provided for locking the cam member to the housing of the disengage mechanism and indicia are provided so that an operator of the device will know whether the cam member is either in its first position or its second position. Additionally, the cam member is provided with a detent within which a cam follower resides in the first position of the cam member which prevents accidental movement of the drive actuator from its first position.

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Lafayette, IN, United States of America

Dennis L Buuck