Patent application number | Description | Published |
20090041593 | VARIABLE DISPLACEMENT TYPE GEAR PUMP - A variable displacement type gear pump has gear chambers, one of which is a specific gear chamber. A suction passage is formed in the housing so as to communicate with suction-side spaces. An outlet passage communicates with discharge-side spaces. A return passage returns the fluid discharged to the discharge-side space of the specific gear chamber to the suction passage. The return passage communicates with the suction passage at a confluence portion located upstream side of the suction-side space. An opening and closing valve opens the return passage in a small displacement operational state. A check valve is located between the discharge-side space of the specific gear chamber and the outlet passage for preventing the fluid discharged from the gear chamber other than the specific gear chamber from flowing into the discharge-side space of the specific gear chamber in the small displacement operational state. | 02-12-2009 |
20090041594 | VARIABLE DISPLACEMENT TYPE GEAR PUMP - In a variable displacement type gear pump, each of a main gear pump portion and a sub gear pump portion has a drive gear, a driven gear engaging with the drive gear, and an urging portion applying radial load to the drive and driven gears. A bypass passage returns fluid in a discharge-side space of the sub gear pump portion to a suction passage. An opening and closing valve opens the bypass passage in a small displacement operational state. A drive shaft supports the main drive gear and the sub drive gear. A driven shaft supports the main driven gear and the sub driven gear. The drive gears and the driven gears are rotated in accordance with a rotation of the drive shaft. The drive and driven shafts transmit the radial load in the main gear pump portion to the sub gear pump portion in the small displacement operational state. | 02-12-2009 |
20090155101 | MOTOR-DRIVEN COMPRESSOR - A motor-driven compressor has a compression mechanism, a rotary shaft, an electric motor, a motor drive circuit, a connecting terminal and a housing assembly. The compression mechanism, the electric motor, and the motor drive circuit are disposed along the axial direction of the rotary shaft in the housing assembly having first through third housings. The first housing is used for mounting the electric motor and the compression mechanism. The second housing has a terminal mounting portion for fixing the connecting terminal. The first and second housings have fastening portions at the radially peripheral portion thereof. The third housing is joined to the second housing to form an accommodation space for accommodating the motor drive circuit. The closed casing is formed by fastening the fastening portions of the first and second housings by means of a first bolt and connecting the second housing to the open end of the first housing. | 06-18-2009 |
20120237381 | SCROLL-TYPE COMPRESSOR FOR VEHICLE - A scroll-type compressor for a vehicle, comprising a housing, a fixed scroll and a movable scroll provided in the housing, and a drive mechanism that is provided in the housing and that drives the movable scroll in a manner that disables rotating and enables orbit, by rotation of a drive shaft supported at a front end and a rear end by a front bearing device and a rear bearing device, is provided. The housing includes a first housing, a second housing and a third housing. The compressor includes a vibration isolator that is provided between the movable scroll and the first housing, wherein the vibration isolator is made of a vibration absorbing material and is capable of absorbing vibrations generated at the movable scroll to thereby prevent transfer of the vibrations from the movable scroll to the mounting member via the first housing. | 09-20-2012 |
20120251348 | MOTOR-DRIVEN COMPRESSOR - A motor-driven compressor that suppresses the transmission of vibration and noise to the exterior. The motor-driven compressor includes a housing and a compressor mechanism and motor mechanism, which are arranged in the housing. The compressor mechanism draws refrigerant into the housing, compresses the refrigerant, and discharges the refrigerant from the housing. The motor mechanism actuates the compressor mechanism. The housing includes a first housing, in which the compressor mechanism and the motor mechanism are fixed, and a second housing, which includes a mounting portion that can be mounted to another member. An anti-vibration member is arranged between the first housing and the second housing. | 10-04-2012 |
20120251358 | MOTOR-DRIVEN COMPRESSOR - A motor-driven compressor that suppresses the transmission of vibration and noise to the exterior, while obtaining heating performance that is sufficient for use in a heat pump. The motor-driven compressor includes a compressor mechanism, which compresses a refrigerant, and a motor mechanism, which actuates the compressor mechanism. The motor-driven compressor further includes an inner housing, which accommodates the compressor mechanism and the motor mechanism in a sealed state, and an outer housing, which accommodates the inner housing. The outer housing includes a mounting portion that can be mounted to another member. A first intermediate member is arranged between the inner housing and the outer housing. The first intermediate member includes anti-vibration and thermal insulation properties. | 10-04-2012 |
20140134033 | SCROLL COMPRESSOR - A scroll compressor includes a rotation shaft, a fixed scroll, a movable scroll, a compression chamber, a shaft support, a housing, a movable member arranged in the shaft support, and a rotation restriction mechanism configured to restrict rotation of the movable scroll. The rotation restriction mechanism includes pins, recesses into which the respective pins are loosely fitted, and the movable member. The movable member includes the pins or the recesses. A switching mechanism is configured to switch the movable member between a state in which movement of the movable member in a radial direction of the rotation shaft is restricted and a state in which the restriction is canceled and the movable member can move freely, which changes a movable range of the movable member in the radial direction so that an orbital radius of the movable scroll is changed. | 05-15-2014 |