Patent application number | Description | Published |
20090208358 | VARIABLE DISPLACEMENT GEAR PUMP - The variable displacement gear pump for a loading system in an industrial vehicle has main and sub gear pump portions, suction, discharge and bypass passages, and check and opening valves. The main gear pump portion has main drive and driven gears, and has suction and discharge side spaces. The sub gear pump portion has sub drive and driven gears, and has suction and discharge side spaces. The bypass passage returns hydraulic fluid in the discharge-side space of the sub gear pump portion to the suction passage. The check valve prevents hydraulic fluid in the discharge-side space of the main gear pump portion from flowing to that of the sub gear pump portion. The opening valve is used for opening and closing the bypass passage, and closes the bypass passage due to a pressure in a discharge conduit of the loading system increased by the load applied to the loading system. | 08-20-2009 |
20100054963 | VARIABLE DISPLACEMENT ROTARY PUMP - A variable displacement rotary pump includes a main pump unit, an auxiliary pump unit, a discharge passage, a bypass passage, a suction passage, a check valve and a control valve. The suction passage is in communication with the discharge passage through the bypass passage and a second discharge port. The check valve is disposed in the discharge passage for preventing fluid in a first discharge port of the main pump unit from flowing into the bypass passage. The control valve is operable for opening and closing the bypass passage. When the control valve opens the bypass passage and the check valve closes the discharge passage, flow rate of the fluid discharged from the discharge passage is reduced. A throttle passage is provided in the bypass passage or the control valve for regulating flow of the fluid in early phase of operation of the control valve to open the bypass passage. | 03-04-2010 |
Patent application number | Description | Published |
20130189143 | DIFFERENTIAL PRESSURE REGULATING VALVE AND MOTOR-DRIVEN COMPRESSOR HAVING DIFFERENTIAL PRESSURE REGULATING VALVE - A differential pressure regulating valve is disposed in a fluid passage. The differential pressure regulating valve includes a valve chamber, a valve hole, a valve body, a support member and an urging member. The valve chamber is formed in the fluid passage and having a cylindrical shape. The valve hole is formed in the fluid passage as an opening which communicates with the valve chamber. The valve body is disposed in the valve chamber and adapted to open and close the valve hole. The support member is fixedly mounted to the valve chamber and extending across flowing direction of the fluid in the valve chamber. The support member has a communication passage for fluid communication between a first valve chamber and a second valve chamber. The urging member is disposed between the support member and the valve body for urging the valve body toward the valve hole. | 07-25-2013 |
20140023542 | COMPRESSOR - A compressor includes a housing having a discharge chamber into which compressed refrigerant gas is discharged, an oil separation chamber, a passage connecting between the discharge chamber and the oil separation chamber, and an outlet port through which the refrigerant gas passed through the oil separation chamber flows out of the housing; and a cylindrical oil separator provided in the oil separation chamber. The oil separator includes a large-diameter portion, a small-diameter portion, and an intermediate portion formed between the large-diameter portion and the small-diameter portion and tapered toward the small-diameter portion. Plural holes are formed in the periphery of the small-diameter portion of the oil separator. The passage is directed toward the small-diameter portion of the oil separator in such a manner that the refrigerant gas swirls around the small-diameter portion, so that the refrigerant gas from which lubricating oil is separated enters the oil separator through the hole. | 01-23-2014 |
20140369819 | METHOD FOR MANUFACTURING ANTI-ROTATION RING OF SCROLL TYPE COMPRESSOR AND ANTI-ROTATION MECHANISM OF THE SCROLL TYPE COMPRESSOR - In a method for manufacturing an anti-rotation ring of a scroll type compressor, wherein the anti-rotation ring is provided in an anti-rotation mechanism for preventing a movable scroll from rotation on its own axis and made of a metal, the steps of the method include drawing a steel plate into a first intermediate body having a bottomed cylindrical shape, punching the bottom of the first intermediate body thereby to make a second intermediate body and ring forming the second intermediate body. | 12-18-2014 |
20150147205 | ELECTRIC COMPRESSOR FOR VEHICLE AIR CONDITIONER - An electric compressor to be mounted on an engine in an engine compartment of a vehicle includes a compression mechanism, an electric motor, a motor driving circuit, a housing, a first mounting leg and a second mounting leg. The housing accommodates therein the compression mechanism, the electric motor and the motor driving circuit. The first mounting leg projects from the housing at a position adjacent to the compression mechanism. The second mounting leg projects from the housing at a position adjacent to the motor driving circuit. Each of the first mounting leg and the second mounting leg includes a fastening portion to be fastened to a portion of the engine and a connecting portion that connects the fastening portion with the housing. The connecting portion of the first mounting leg is made to be broken more easily than connecting portion of the second mounting leg. | 05-28-2015 |