Patent application number | Description | Published |
20080243344 | Vibration management system - A vibration management system ( | 10-02-2008 |
20090325762 | Machine having a multiple-ratio transmission - A method of operating a machine is disclosed. The machine may have a power system that includes a prime mover, a multiple-ratio transmission, a propulsion device, and power-system controls. The method may include propelling the machine by transmitting power from the prime mover to the propulsion device through the multiple-ratio transmission, while controlling operation of the prime mover and the multiple-ratio transmission with the power-system controls. This may include determining with the power-system controls at least one energy-efficiency estimate based at least in part on energy-efficiency characteristics of the prime mover and energy-efficiency characteristics of the multiple-ratio transmission. Controlling the prime mover and the multiple-ratio transmission may further include controlling a prime-mover operating speed of the prime mover and a transmission drive ratio of the multiple-ratio transmission based at least in part on the at least one energy-efficiency estimate. | 12-31-2009 |
20100007118 | Tandem wheel arrangement - A machine ( | 01-14-2010 |
20100012401 | Tandem wheel arrangement - A machine ( | 01-21-2010 |
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 |
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 |
20100050803 | Manual control device - A manual control ( | 03-04-2010 |
20100102537 | System and method for load balancing in a tandem wheel arrangement - A tandem drive arrangement includes one or more independently driven wheels ( | 04-29-2010 |
20100108336 | Ride control for motor graders - A ride control arrangement for a machine having a frame, a ripper, a hydraulic actuator operative to move the ripper includes at least one accumulator assembly, and a valve mechanism operatively disposed between the accumulator assembly and the hydraulic actuator to either block or allow fluid communication between the hydraulic actuator and the accumulator assembly. A ride control arrangement for a motor grader with an implement operated by a hydraulic actuator similarly includes at least one accumulator assembly selectively fluidly connected to the hydraulic actuator by way of a valve mechanism. | 05-06-2010 |
20100114430 | Steering system and method of steering a machine - A steering system for steering a machine having opposing first and second sides with first and second pairs of rotatably mounted rear wheels disposed along the respective sides and at least one rotatably mounted, spaced front wheel. The system includes at least one first drive unit and at least one second drive unit for rotating the rear wheels of the respective pairs, and a steering input device that provides a signal to a controller that produces drive unit request signals to control the drive units to rotate the associated rear wheels along one side at rotational speeds greater than those along the other side to facilitate turning. | 05-06-2010 |
20110114410 | Tandem Wheel Arrangement - A machine ( | 05-19-2011 |
20120006603 | Steering system and method of steering a machine - A steering system for steering a machine having opposing first and second sides with first and second pairs of rotatably mounted rear wheels disposed along the respective sides and at least one rotatably mounted, spaced front wheel. The system includes at least one first drive unit and at least one second drive unit for rotating the rear wheels of the respective pairs, and a steering input device that provides a signal to a controller that produces drive unit request signals to control the drive units to rotate the associated rear wheels along one side at rotational speeds greater than those along the other side to facilitate turning. | 01-12-2012 |
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 |