Patent application number | Description | Published |
20100018727 | WHEEL TRACTOR SCRAPER REAR WHEEL DRIVE ASSIST AND METHOD OF OPERATION - A wheel tractor scraper having a rear wheel drive assist, the wheel tractor scraper includes a tractor portion pivotally coupled to a rear scraper portion, the rear scraper portion having a bowl for hauling material and a fluid powered work tool configured to assist in loading the bowl, the work tool powered by a fluid pump connected to a fluid operated work tool motor. The rear wheel drive assist includes a fluid operated drive motor coupled to the rear wheels of the machine, a diverter valve having a first position at which fluid flow is delivered from the pump to the work tool motor and a second position at which fluid flow is delivered from the pump to the drive motor, and a controller being configured to control the diverter valve to engage the rear wheel drive assist. The machine may be operated by engaging the pump and work tool motor, and then actuating the diverter valve to the second position to divert flow from the work tool motor to the drive motor. | 01-28-2010 |
20100018728 | REAR WHEEL DRIVE ASSIST FOR A WHEEL TRACTOR SCRAPER - A rear wheel drive assist for a wheel tractor scraper, the wheel tractor scraper having a tractor portion with a power source operatively connected to the front driven wheels, and a rear, scraper portion having a bowl, work tool, and first and second rear wheels, the rear wheel drive assist includes a work tool pump fluidly connected to a work tool motor to drive the work tool, fluid operated drive motors operatively connected to the rear wheels, and a diverter valve selectively movable between a first position that delivers fluid flow from the pump to the work tool motor, and a second position that delivers fluid flow from the work tool pump to the rear wheel drive motors. | 01-28-2010 |
20100050620 | Control system and method for braking a hydrostatic drive machine - A method of braking a hydrostatic drive machine includes steps of reducing a displacement of a pump of a hydrostatic drive system to a non-zero displacement, and increasing a displacement of a motor of the hydrostatic drive system to a displacement that is less than a maximum displacement. The method also includes a step of accelerating an engine of the hydrostatic drive system toward a desired engine speed range. | 03-04-2010 |
20110089655 | Wheel Speed Sensing System and Method - An improved speed sensing system is disclosed for a machine, such as a truck, that has an axle with an end and an axis. The machine further includes a sensor non-rotatably coupled to the end of the axle and coaxial with the axis. A wheel hub is rotatably coupled to the axle and a wheel cover is coupled to the wheel hub. The machine further includes a magnet coaxially disposed with the axis and coupled to the wheel cover for rotation about the axis as the wheel rotates. The sensor generates signals based on the rotational speed of the magnet and the wheel. For non-rotating axles that are solid or include solid spindles, a passageway for a communication line between the sensor and electronic control module (ECM) may be easily drilled thereby making the disclosed system easy to add to an existing machine or vehicle. | 04-21-2011 |
20120130600 | MOTOR GRADER WHEEL SLIP CONTROL FOR CUT TO GRADE - The described system and method are implemented within a motor grader or other machine for grading of surfaces, wherein the machine includes a ground engaging element, as well as one or more blades for removing surface material. In this context, the described system and method prevent slippage of the ground engaging element against the underlying surface. In an embodiment, a torque limit is applied, wherein the torque limit corresponds to a torque that is less than that required for slippage under the current operating conditions, thus avoiding the problems caused by both overly aggressive and overly conservative cut depth strategies. | 05-24-2012 |
Patent application number | Description | Published |
20090272596 | Wheel end with integrated motor assembly - A wheel end assembly comprises a wheel hub support housing and a wheel hub drive assembly rotatably connected to the wheel hub support housing. The wheel end assembly also includes a hydraulic motor operatively coupled to the wheel hub drive assembly, the hydraulic motor being disposed to deliver a torque to the wheel hub drive assembly. The wheel end assembly further includes a pump, fluidly coupled to the wheel hub drive assembly and the hydraulic motor, the pump being disposed to provide a flow of hydraulic fluid to the wheel hub drive assembly. | 11-05-2009 |
20100018732 | Cooling system packaging arrangement for a machine - A radiator of a cooling system is disposed within an engine compartment, between a rear mounted engine and a cab on a wheeled machine. The remaining components within the engine compartment are arranged such that they are lower in height than the radiator, the engine compartment enclosure generally angling down from the cab rearward. The enclosure includes an air intake that opens into a gap between the enclosure and cab. A fan disposed rearward the radiator may pull cooling air through the air intake and past the radiator. | 01-28-2010 |
20120233992 | WHEEL END WITH INTEGRATED MOTOR ASSEMBLY - A wheel end assembly comprises a wheel hub support housing and a wheel hub drive assembly rotatably connected to the wheel hub support housing. The wheel end assembly also includes a hydraulic motor operatively coupled to the wheel hub drive assembly, the hydraulic motor being disposed to deliver a torque to the wheel hub drive assembly. The wheel end assembly further includes a pump, fluidly coupled to the wheel hub drive assembly and the hydraulic motor, the pump being disposed to provide a flow of hydraulic fluid to the wheel hub drive assembly. | 09-20-2012 |