Patent application number | Description | Published |
20090056756 | DISHWASHER AND METHOD OF CONTROLLING A DISHWASHER - A dishwasher is provided which can determine whether a filtering device needs to be cleaned based on the time taken for a drain pump to discharge wash fluid from a sump. The dishwasher can make this determination without a manual examination of food waste collected in the filtering device. A related method of controlling the dishwasher based on such a determination is also provided. | 03-05-2009 |
20090056757 | METHOD OF CONTROLLING DISHWASHER AND DISHWASHER - A dishwasher and method of controlling a dishwasher are provided. In the dishwasher and the method, a heater in a sump begins to be driven when a measured fluid supply frequency measured before the supply of wash fluid into the sump is complete reaches a predefined value, and thus heats the wash fluid in the sump. Thus, it is possible to reduce the time taken to heat the wash fluid in the sump to a target temperature, thus reducing the operating time of the dishwasher. | 03-05-2009 |
20090056773 | DISHWASHER - A dishwasher is provided. The dishwasher measures the amount of vibration caused by a drain pump, and terminates the operation of the drain pump if the amount of vibration measured exceeds a predefined vibration level. Thus, it is possible to precisely determine, during a drain operation, when a sump will be completely drained and thus prevent the drain pump from being driven any longer if no wash fluid remains in the sump. Therefore, it is possible to prevent excessive vibration and noise from being generated. | 03-05-2009 |
20090078288 | METHOD OF CONTROLLING DISHWASHER AND DISHWASHER - A dishwasher and a method of controlling a dishwasher are provided. Using this method of controlling a dishwasher, it is possible to quickly and precisely determine, during the washing of dishes, whether nozzles are clogged with impurities. It is also possible to easily address the problems associated with clogged nozzles by terminating the operation of a washing pump for a predefined amount of time, and then resuming the operation of the washing pump to clear obstructions from the nozzles. | 03-26-2009 |
20090078289 | METHOD OF CONTROLLING DISHWASHER - A dishwasher and a method of controlling a dishwasher are provided. The method includes heating wash fluid in a washing tub when no dishes are loaded in the washing tub, and sterilizing the washing tub by spraying the heated wash fluid into the washing tub with the use of a wash fluid spray device. Therefore, it is possible to remove wash fluid and impurities remaining in the washing tub and to prevent an offensive odor from being emitted from the washing tub. | 03-26-2009 |
Patent application number | Description | Published |
20080282534 | Apparatus for attachment of hydraulic values for controlling working devices of heavy equipment - An apparatus for attachment of hydraulic valves for controlling working devices of heavy equipment is provided, which can reduce a lead time for attaching and assembling a main control valve, an accessory valve, and valve blocks for jointly connecting the respective valves with hydraulic piping, to an upper swing structure. The apparatus includes a lower driving structure and an upper swing structure, a cabin and an engine room, working devices fixed to the upper swing structure, a main control valve shifted in accordance with an operation signal from an operation lever and including spools for controlling a supply amount and a flow direction of hydraulic fluid fed to the corresponding working devices, a sub-plate attached to a specified position of the upper swing structure, an accessory valve installed on the sub-plate and controlling hydraulic fluid fed to the main control valve, and valve blocks installed on the sub-plate and jointly connecting the main control valve and the accessory valve with hydraulic pipes. The sub-plate is attached to the upper swing structure after the main control valve, the accessory valve, and the valve blocks are installed on the sub-plate, and the respective valves are connected with the hydraulic piping. | 11-20-2008 |
20090031720 | Hydraulic circuit for heavy equipment having variable control device - A hydraulic circuit for heavy equipment having a variable control device is provided, in which variable relief valves for variably controlling operating pressure and flow rate of an option attachment are installed inside a main control valve, and pressure of the variable relief valves is variably controlled through selection of a preset option working mode. The hydraulic circuit includes at least one variable displacement hydraulic pump; a main relief valve installed on an upstream side of a discharge flow path of the hydraulic pump; an option attachment connected to the hydraulic pump; a main control valve installed in a flow path between the hydraulic pump and the option attachment; port relief valves, installed inside the main control valve, for being proportionally controlled so as to variably control relief pressure required for the option attachment in accordance with pilot signal pressure inputted from an outside; and a proportional relief valve, installed outside the main control valve, for variably controlling the pilot signal pressure inputted to the port relief valves in accordance with an electric signal inputted from an outside. | 02-05-2009 |
20090084454 | APPARATUS FOR FIXING HYDRAULIC PIPES FOR ZERO TAIL SWING EXCAVATOR - An apparatus for fixing hydraulic pipes for a zero tail swing excavator is provided, which can simplify an assembling process of hydraulic pipes and improve the workability by dividedly forming intermediate sides of the hydraulic pipes for supplying hydraulic fluid from a main control valve to hydraulic cylinders and jointly fixing the dividedly formed intermediate sides of the hydraulic pipes by a connection means in a narrow space between a boom and an upper swing structure due to the characteristic of the zero tail swing excavator. The apparatus for fixing hydraulic pipes includes a lower driving structure; an upper swing structure mounted on the lower driving structure to be swiveled; working devices fixed to the upper swing structure and having a boom, an arm, and a bucket driven by their hydraulic cylinders; boom fixing frames which are mounted on the upper swing structure and to which the boom is rotatably fixed; main pipes for supplying hydraulic fluid to the hydraulic cylinders, intermediate sides of the main pipes being dividedly formed and being jointly connected by a socket; and a bracket for fixing the main pipes, which is fixed to the boom fixing frames and to which the socket is fixed. | 04-02-2009 |
20100293936 | HYDRAULIC SYSTEM WITH IMPROVED COMPLEX OPERATION - A hydraulic system with an improved complex operation is provided, which can prevent the generation of shock in a boom by delaying pressure supply during start and end of pilot signal pressure supplied to a spool for controlling an option device when a boom ascending operation and an operation of an option device are simultaneously performed or when such a simultaneous operation of the boom and the option device switches over to an independent operation of the boom. The hydraulic system with an improved complex operation includes main hydraulic pumps and a pilot pump; a boom cylinder and an option device; a main control valve including a boom spool and an option device spool which are shifted by a pilot signal pressure from the pilot pump; an operation lever which controls the boom spool; an option operation pedal which controls the option device spool; a confluence spool for controlling the option device; and a controller which outputs an electric control signal to a proportional control valve for the option device so as to delay pilot signal pressure supplied to the confluence spool during start and end of the pilot signal pressure supply when a complex operation for simultaneously operating the boom cylinder and the option device is performed. | 11-25-2010 |
20130292998 | BRAKE CONTROL DEVICE OF WHEEL TYPE CONSTRUCTION MACHINE - Disclosed is a brake device for braking front and rear axles by working oil supplied to front and rear brake cylinders from a hydraulic pump according to the control of a brake pedal. The brake control device of a wheel type construction machine according to the present invention includes: a brake hydraulic pump and a brake pedal; a brake valve, of which a spool is converted according to the control of the brake pedal; a brake device having front and rear brake cylinders, which are driven by working oil supplied at the time of controlling the brake pedal and have different volumes, and front and rear discs to be engaged according to the operation of the front and rear brake cylinders; front and rear axles which are braked by the brake device; and a flow rate control valve mounted on a path between the brake pedal and either the front or rear brake cylinder, whichever has a relatively smaller volume, and distributing and supplying a flow rate to the front and rear brake cylinders according to the control angle of the brake pedal so as to synchronize the front and rear axles at a braking force generating time point. | 11-07-2013 |
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 |
20140367529 | HYDRAULIC LINE FIXING APPARATUS FOR BOOM SWING-TYPE EXCAVATORS - A hydraulic pipe fixing apparatus for a boom-swing type excavator is disclosed, which makes hydraulic hoses for attachments and hydraulic hoses for additional option devices be arranged in predetermined positions inside a boom supporter ( | 12-18-2014 |