| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 060456000 | Having distinct cooling or lubricating structure | 23 |
| 20080223029 | OIL COOLING CIRCUIT FOR CONTINUOSLY RECIPROCATING HYDRAULIC CYLINDERS - An oil cooling and filtering circuit connecting a reciprocating fluid power hydraulic cylinder to a reversible hydraulic pump or hydraulic directional valve. The circuit consists preferably of a three-way, three-position valve and a purge relief valve, which functions to divert a percentage of the low pressure oil coming out of the cylinder work port to an oil cooler. Instead of the fluid simply moving back and forth in the line and become overheated due to fluid friction and repeated pressurization, the working fluid in the line to the cylinder work port is circulated out of the fluid line and gradually replaced with cooled oil. The circuit itself does not perform cooling, but it provides a means to send trapped oil to an oil cooler. A secondary advantage is to provide filtration to the oil that is removed for cooling. | 09-18-2008 |
| 20080264053 | HYDRAULIC SYSTEM AND A METHOD OF OPERATING A HYDRAULIC PUMP - A method of operating a hydraulic pump, comprising:
| 10-30-2008 |
| 20090038306 | COOLING APPARATUS FOR CONTINUOUSLY VARIABLE TRANSMISSION - Light weight and a reduction of production cost can be achieved for a cooling apparatus of a CVT that uses a forward clutch and a reverse brake as launching clutches, when the cooling apparatus includes: a manual valve that receives and outputs a first hydraulic pressure for operating the launching clutches and that receives and outputs a second hydraulic pressure for cooling the launching clutches; a first hydraulic line for supplying the first hydraulic pressure to the manual valve; a second hydraulic line for supplying the first hydraulic pressure from the manual valve to the forward clutch; a third hydraulic line for supplying the second hydraulic pressure to the manual valve; and a fourth hydraulic line for supplying the second hydraulic pressure from the manual valve to the forward clutch. | 02-12-2009 |
| 20090217655 | Cooling System for Construction Machine - A cooling system for a construction machine, which can reduce noise of a cooling fan and can reliably produce cooling air at a required flow rate. | 09-03-2009 |
| 20090217656 | Hydraulically Driven Industrial Machine - A hydraulically driven industrial machine has a variable displacement hydraulic pump for pressurizing hydraulic oil from a hydraulic oil tank; a actuator driven and controlled by oil that is discharged from the hydraulic pump and is supplied through a controlled valve and performing predetermined work; cooling means with a variable cooling rate function, the cooling means cooling return oil from the actuator and varying the rate of cooling of the return oil; load detection means for detecting work load by the actuator; and control means for varying the rate of cooling of the return oil according to the work load detected by the load detection means. | 09-03-2009 |
| 20090235657 | COOLING SYSTEM AND A TRANSMISSION SYSTEM HAVING SAID COOLING SYSTEM INTEGRATED THEREWITH - The present invention provides a cooling system such as employed in cooling a heat source and a transmission system having said cooling system integrated therewith. The cooling system further includes a pump for supplying hydraulic fluid under pressure to a motor for driving a fan employed in the cooling process. In operation, a controller initiates operation of the pump such as to supply hydraulic fluid to said motor only when needed, thereby to improve the efficiency and controllability of the cooling system. | 09-24-2009 |
| 20100095664 | HST Cooling Circuit - There are provided: an HST hydraulic circuit that is formed through a closed circuit connection of a variable displacement hydraulic pump | 04-22-2010 |
| 20110131969 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING INDEPENDENTLY CONTROLLED STATOR COOLING FLOW - A hydraulic control system includes a source of pressurized hydraulic fluid for providing a pressurized hydraulic fluid, a main line circuit in fluid communication with the source of pressurized hydraulic fluid, a regulation valve in communication with the source of pressurized hydraulic fluid, the regulation valve moveable between a plurality of positions, and a lubrication valve in communication with the regulation valve, the lubrication valve moveable between a plurality of positions. A lubrication circuit and a cooling circuit are in communication with the lubrication valve. The regulation valve allows pressurized hydraulic fluid to communicate with the lubrication valve after the main line circuit is saturated, the lubrication valve allows fluid communication between the regulation valve and the lubrication circuit until the lubrication circuit is saturated, and the lubrication valve allows fluid communication between the regulation valve and the cooling circuit and the lubrication circuit after the lubrication circuit is saturated. | 06-09-2011 |
| 20110162355 | HYDRAULIC FLUID COOLING SYSTEM FOR PAIR OF INTEGRATED HYDROSTATIC TRANSMISSIONS WITH AUXILIARY HYDRAULIC CIRCUIT - A hydraulic fluid cooling system for a pair of integrated hydrostatic transmissions includes a common reservoir holding hydraulic fluid and having hydraulic lines connecting the common reservoir to each integrated hydrostatic transmission, a hydraulic fluid reservoir inside each integrated hydrostatic transmission, and a pump for pumping fluid from each transmission's hydraulic fluid reservoir to the other transmission. An auxiliary hydraulic circuit is between the pair of integrated hydrostatic transmissions. The system pumps hydraulic fluid from one of the integrated hydrostatic transmission to the auxiliary hydraulic circuit, and the return line from the auxiliary hydraulic circuit may be connected to the other integrated hydrostatic transmission. | 07-07-2011 |
| 20110173965 | TRANSMISSION HYDRAULIC CONTROL SYSTEM HAVING A DUAL ELEMENT PUMP - A hydraulic control system for a transmission includes a motor, a sump for storing a hydraulic fluid, and a dual element pump connected to the motor. The dual element pump has at least one input port connected to the sump, a first outlet port, and a second outlet port. The dual element pump provides a first volume of hydraulic fluid to the first outlet port and provides a second volume of hydraulic fluid to the second outlet port. The first volume is greater than the second volume. The first outlet port is connected to a diversion valve. The second outlet port is connected to a high pressure hydraulic circuit. The diversion valve is operable to transmit the hydraulic fluid from the first outlet port to a low pressure hydraulic circuit and the high pressure hydraulic circuit. | 07-21-2011 |
| 20110219762 | CONSTRUCTION MACHINE - A top cover ( | 09-15-2011 |
| 20130081387 | FLUID COOLING DEVICE - The invention relates to a fluid cooling device ( | 04-04-2013 |
| 20140083092 | HYDRAULIC CIRCUIT FOR CONSTRUCTION EQUIPMENT - A hydraulic circuit for construction equipment is provided, which supplements hydraulic fluid of a hydraulic pump for a cooling fan and hydraulic fluid of a main hydraulic pump and uses the supplemented hydraulic fluid as a hydraulic source of a RCV in order to supply signal pressure to a control valve that controls the driving of a hydraulic actuator. The hydraulic circuit includes first to third hydraulic pumps, a first control valve installed in a flow path of the first flow path, a second control valve installed in a flow path of the second hydraulic flow path, a hydraulic motor connected to the third hydraulic pump, a cooling fan connected to the hydraulic motor, a first shuttle valve having an input portion connected to the first hydraulic pump and the third hydraulic pump, a second shuttle valve having an input portion connected to the second hydraulic pump and the third hydraulic pump, and a pilot pressure generation device installed in a pilot flow path connected to the output portions of the first and second shuttle valves and shifted to supply the hydraulic fluid having a relatively high pressure among the hydraulic fluids of the first to third hydraulic pumps to the first and second control valves as pilot signal pressure. | 03-27-2014 |
| 20140196447 | HYDRAULIC CIRCUIT FOR TRANSMISSIONS | 07-17-2014 |
| 20140245731 | SPOOL VALVE AND LUBRICATING OIL SUPPLY DEVICE - A spool valve that has a hollow portion formed with an input port, a first output port, and a second output port, and a spool capable of sliding within the hollow portion and having a plurality of lands, the spool valve being configured to distribute output for input to the input port to the first output port and the second output port in accordance with a proportion of distribution that matches a position of the spool. An opening of the second output port is formed in such a shape that a width of the opening becomes gradually smaller in a direction of movement of the spool in which distribution of the output to the first output port is increased. | 09-04-2014 |
| 20140260234 | HYDRAULIC UNIT - An oil-hydraulic unit includes a power module generating heat when energized. The power module is provided on the bottom surface of a recess facing hydraulic oil in a tank. Thus, the power module is cooled by the hydraulic oil in the tank. This reduces the difference in temperature between the power module and the hydraulic oil in the tank. In the oil-hydraulic unit, the temperature sensor detects the temperature of the power module. The oil temperature in the tank is estimated based on the temperature detected by the temperature sensor. | 09-18-2014 |
| 20150013321 | SEPARATE HYDRAULIC UNIT WITH COOLING OF OIL - A separate hydraulic power pack for providing at least one user with an oil flow. The hydraulic unit includes a motor, a hydraulic pump driven by the motor, a tank, an oil inlet, an oil outlet, a heat exchanger, and a first conduit system for oil. The first conduit system connects at least the oil inlet, the heat exchanger, the oil tank, the hydraulic pump and the oil outlet. The heat exchanger is provided for liquid cooling of the oil. A cooling liquid inlet for connection to a cooling liquid source, a first cooling liquid outlet and a second conduit system for a cooling liquid. | 01-15-2015 |
| 20150033729 | FLOW CONTROL ASSEMBLY AND METHODS OF ASSEMBLING THE SAME - A flow control assembly for controlling cooling flow of a turbine engine is provided. The flow control assembly includes a first flow control device having a first sidewall and a second sidewall. The first sidewall is coupled to a compressor vane and is configured to define a first flow path from a compressor to a turbine vane. The second sidewall is coupled to a compressor vane and is configured to define a second flow path from the compressor to a turbine blade. A second flow control device is coupled to the compressor and includes an orifice device coupled to the compressor vane and a meter device coupled to the orifice, wherein the orifice is configured to direct a cooling flow to the meter device. A controller is configured to control the meter device to facilitate regulating the cooling flow into at least one of the first flow path and the second flow path. | 02-05-2015 |
| 20150033730 | COMPRESSOR HOUSING FOR AN AIR CYCLE MACHINE - A component of an air cycle machine includes a fan housing portion, a compressor housing portion, a main bore housing radius, a static seal radius, a shroud pilot housing radius, and an insulator seal plate housing radius. The fan housing portion includes a shroud for a fan section. The compressor housing portion includes a shroud for a compressor air inlet, a shroud portion for a compressor blade section, and a shroud portion for a compressor air outlet. The main bore housing radius is arranged about a central axis and is configured to circumscribe a shaft arranged along the central axis, the main bore housing radius being between 1.9400 and 1.9440 inches. The static seal portion is arranged about the central axis and positioned longitudinally adjacent to the main bore housing portion. The static seal portion is configured to circumscribe a static seal defined by the shaft, and has a radius between 2.0420 and 2.0440 inches. The shroud pilot housing radius is arranged about the central axis. The shroud pilot housing radius is between 5.9440 and 5.9470 inches. The insulator seal plate housing radius is arranged about the central axis and is configured to mate with an adjacent turbine section component. The insulator seal plate housing radius is between 8.6380 and 8.6420 inches. | 02-05-2015 |
| 20150308468 | VALVE FOR THE TEMPERATURE-DEPENDENT CONTROL OF AT LEAST ONE HYDRAULIC LOAD - The invention relates to a valve ( | 10-29-2015 |
| 20150337955 | TRANSMISSION HYDRAULIC CONTROL SYSTEM INCLUDING THERMAL VALVE - A hydraulic control system provides lubrication fluid to a gearbox via two flow paths in parallel. One of the flow paths includes a passive thermal valve in series with a heat exchanger. When the fluid temperature is elevated, the thermal valve opens such that fluid flows through the heat exchanger for cooling. The thermal valve restricts flow to the heat exchanger when transmission fluid is in a normal operating temperature range, reducing flow demands. When the flow demands are reduced, a variable displacement pump requires less torque improving fuel economy. The thermal valve may also open when the fluid is below the normal operating temperature such that the heat exchanger heats the fluid. The parallel path may include a regulator valve. When the pressure of fluid in the lubrication circuit is elevated, the regulator valve reduces flow through the parallel path and may also divert flow to a sump. | 11-26-2015 |
| 20150354605 | CONSTRUCTION MACHINE - A construction machine is provided which is capable of warming up without an additional hydraulic device. A hydraulic excavator includes a cooling oil line connected to an arm control valve for leading hydraulic oil discharged from the arm control valve to a tank through an oil cooler when the arm control valve is shifted to an extension position, and a non-cooling oil line connected to the arm control valve for leading hydraulic fluid discharged from the arm control valve to the tank running away from the oil cooler when the arm control valve is shifted to a neutral position. The arm control valve includes a guide passage provided at the neutral position for leading hydraulic fluid discharged from a hydraulic pump to the non-cooling oil line. | 12-10-2015 |
| 20160201545 | Cooling Fan Control Device for Construction Machine | 07-14-2016 |
