With Relatively Movable Partition Member Patents (Class 418/63)
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Patent number: 5941346Abstract: A closed-type transmission compressor comprises an upper shell having a compressing unit and a lower shell having a transmission unit. The transmission unit includes a stator which generates magnetic power, a rotor rotated by the magnetic power of the stator, and a crankshaft rotated by rotation of the rotor. The compressing unit includes a slider changing rotatory movement of the crankshaft into linear movement, a piston attached to the slider and reciprocating in a cylinder, a head cover covering the cylinder, an inlet valve between a head and a head cover which permits intake of a refrigerant gas, an outlet valve between the head and the head cover which permits exhaust of the refrigerant gas, a propeller conveying oil in the lower shell into the crankshaft, and a screw-shaped oil path groove formed in the inside of crankshaft along which the oil is flowed.Type: GrantFiled: August 5, 1997Date of Patent: August 24, 1999Assignee: LG Electronics Inc.Inventor: Won Sik Oh
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Patent number: 5842846Abstract: In a hermetic type compressor, a sliding part (11) between a main shaft (4) and a lower end plate (8) is large in wear, and it is not allowed to operate stably for a long period. By communicating between the sliding part (11) and an oil feed pump (9) through an oil feed port (12), refrigerating machine oil (2) is supplied by force into the sliding part (11), and hence the lubrication is improved and the reliability is enhanced. In particular, it is preferably applied to the hermetic type compressor using HFC derivative refrigerants.Type: GrantFiled: July 15, 1996Date of Patent: December 1, 1998Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirotsugu Fukuoka, Hiroshi Matsunaga, Keisuke Morita, Shinji Fujiwara
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Patent number: 5829960Abstract: A suction inlet passage in a cylinder block of a rotary compressor includes a generally symmetrical diverging port which has generally conic cross-sections that divergingly open into a cylinder bore. The diverging port provides a buffer cavity which reduces pulsations and associated noise. The suction inlet passage is further provided with an entrance passage and a narrower passage, which is disposed between the entrance passage and the diverging port and which has a smaller cross-section than either the entrance passage or the diverging port. The suction inlet passage serves as a diffuser with the narrower passage functioning as the throat of the diffuser so as to increase volumetric efficiency with respect to the suction gas entering the cylinder bore. The diverging port extends the point of suction inlet close-off, and correspondingly enlarges the close-off angle, resulting in extending the period of unclosed compression and enhancing the supercharging effect.Type: GrantFiled: April 30, 1996Date of Patent: November 3, 1998Assignee: Tecumseh Products CompanyInventor: Nelik I. Dreiman
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Patent number: 5823755Abstract: The annular piston of a rolling piston compressor coacts with a groove in valving action such that the groove serves as a supplemental discharge flow area but gas therein is prevented from constituting part of the suction flow. The groove may be in the motor end bearing and/or pump end bearing and permits flow from the compression chamber to the interior of the piston which is in fluid communication with the interior of the shell while the compression chamber is undergoing discharge.Type: GrantFiled: December 9, 1996Date of Patent: October 20, 1998Assignee: Carrier CorporationInventors: Francis P. Wilson, Andrea B. Dacosta, James W. Bush
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Patent number: 5806336Abstract: There are provided a highly durable and efficient refrigerating apparatus and a lubricating oil composition that uses an HFC type refrigerant and is still free from the problem of thermal hydrolysis of polyol-ester type oil and resulting generation of carboxylic acid and sludge so that the refrigerating apparatus and the lubricating oil composition may be used stably for a prolonged period of time. A lubricating oil composition according to the invention comprises as base oil components a polyol-ester type oil formed by reacting specific polyhydric alcohol with a fatty acid, to which tricresylphosphate and epoxy compound comprising glycidyl ether or carbodiimide are added at respective specific rates.Type: GrantFiled: November 29, 1995Date of Patent: September 15, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Takashi Sunaga, Yoshinobu Obokata, Masazo Okajima, Takeo Komatsubara, Yasuki Takahashi
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Patent number: 5800150Abstract: A hermetic compressor which compresses compressed gas, comprising a sealing container, a compression mechanism which is housed in the sealing container and introduces the compressed gas into its inside to compress the compressed gas, and a frame for fixedly supporting the compression mechanism. A portion where the compression mechanism and the frame are abutted against each other, is provided with a solid propagation wave damping portion which damps a vibratory propagation by suddenly changing a cross section of a abutting portion.Type: GrantFiled: November 26, 1996Date of Patent: September 1, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Izumi Onoda, Yasushi Adachi, Isao Kawabe, Kazu Takashima
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Patent number: 5788472Abstract: A rotary compressor includes a motor which rotates a crankshaft about an axis. The crankshaft includes an eccentric portion disposed in a cylinder which has a fluid inlet and a fluid outlet. A roller is mounted on the eccentric portion to be orbited within the cylinder when the crankshaft rotates, for compressing fluid. The eccentric portion and roller are together movable radially with respect to the axis in response to centrifugal force, so that the roller maintains tight contact with the cylinder.Type: GrantFiled: December 29, 1995Date of Patent: August 4, 1998Assignee: Samsung Electronics Co., Ltd.Inventor: Joon-Hyun Lee
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Patent number: 5782622Abstract: A hermetic compressor which compresses compressed gas, comprising a sealing container, a compression mechanism, contained within said sealing container, for compressing said compressed gas, said compression mechanism including a rotary shaft, a motor for actuating the compression mechanism by driving the rotary shaft, first and second bearings, arranged individually on both sides of the compression mechanism, for journaling said rotary shaft, and a frame for fixedly supporting the compression mechanism, the frame comprises a frame body having a hollow portion in which said first bearing is situated, said frame body being fixed on one end surface of the compression mechanism and a bearing support portion for sealing the hollow portion of the frame body and supporting an outer peripheral portion of the first bearing.Type: GrantFiled: November 22, 1996Date of Patent: July 21, 1998Assignee: Kabushiki Kaisha ToshibaInventors: Masao Ozu, Izumi Onoda
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Patent number: 5782618Abstract: There is provided a rotary compressor comprising an electric driving element and a rotary compression element in a hermetically sealed casing and constituted by setting a round cylinder block of the rotary compression element between a main bearing and an auxiliary bearing both of which support a shaft of the electric driving element and joining and securing at least two joining ends of the cylinder block to the inner periphery of the hermetically sealed casing; in which the thickness between the outermost ends of the joining ends of the cylinder block is set to 45 to 85% of the maximum thickness of the cylinder block in the axis direction. The rotary compressor of the present invention makes it possible to greatly reduce the air column resonance in the hermetically sealed casing due to pressure pulsation of discharged gas and the vibration due to pressure pulsation in the cylinder block of the rotary compression element and moreover reduce noises during operation.Type: GrantFiled: September 24, 1996Date of Patent: July 21, 1998Assignee: Sanyo Electric Co., Ltd.Inventors: Takahiro Nishikawa, Kenzo Matsumoto, Takashi Sato, Masaji Yamanaka
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Patent number: 5775894Abstract: In a refrigerant compressor, a discharge valve assembly which reduces reexpansion volume. The present invention provides a discharge valve assembly for reciprocating, rotary, and scroll types of compressors, and includes a spherical valve member that engages and penetrates a discharge port provided on a compressor cylinder head, valve plate or scroll plate. The discharge port is formed in the cylinder head or scroll plate and is dimensioned such that the spherical member penetrates and substantially fills the discharge port. The reexpansion volume within the discharge port is thereby reduced. To maintain engagement of the spherical member with the discharge port, an elastically deformable arm having an aperture is positioned to hold the spherical member in the discharge port. The arm is elastically deformable to allow the spherical valve member to move out of engagement with the discharge port during the compression phase of the compressor.Type: GrantFiled: November 5, 1996Date of Patent: July 7, 1998Assignee: Tecumseh Products CompanyInventor: John Kosco, Jr.
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Patent number: 5685703Abstract: A hermetically sealed rotary compressor includes a generally cylindrical sealed vessel having an oil reservoir defined therein for accommodating a quantity of lubricating oil, a drive unit within the sealed vessel, and a compressor mechanism within the sealed vessel. The compressor mechanism includes a cylinder having a compression compartment defined therein and also having upper and lower openings, an eccentric cam provided on a crankshaft for rotation together therewith, and a ring-shaped piston mounted on the crankshaft while encircling the eccentric cam and capable of undergoing a planetary motion in contact with the eccentric cam during rotation of the eccentric cam. The cylinder has a refrigerant intake port defined therein in communication with the compression compartment.Type: GrantFiled: May 16, 1996Date of Patent: November 11, 1997Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirotsugu Fukuoka, Keisuke Morita, Hiroshi Matsunaga, Shigeru Muramatsu
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Patent number: 5676535Abstract: A relieved portion is provided in the motor end bearing of a rotary compressor in the region of the discharge port. The relief is in the nature of a chamfer or the like and enhances the flow by smoothing the flow path. The relief is limited to the portion of the motor end bearing overlying the cylinder bore so as to limit its contribution to the clearance volume.Type: GrantFiled: January 9, 1997Date of Patent: October 14, 1997Assignee: Carrier CorporationInventor: Paul J. Bushnell
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Patent number: 5672054Abstract: Lubrication deficiencies related to the use of synthetic lubricants such as POE oils in refrigeration compressors can be mitigated by providing a diamond-like-carbon coating on a member subject to wear due to lubrication deficiencies. Specifically, the tip of the vane of a rotary compressor is coated with a diamond-like-carbon coating made up of alternating layers of tungsten carbide and a lubricious material 0.5 to 5.0 microns thick.Type: GrantFiled: December 7, 1995Date of Patent: September 30, 1997Assignee: Carrier CorporationInventors: Clark V. Cooper, Paul J. Bushnell, Martin M. Mertell
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Patent number: 5667372Abstract: A rotary compressor is disclosed. The compressor reduces frictional loss in a contact part between the rolling piston and the eccentric sheave and in contact parts between the crankshaft and the main and sub bearings by achieving smooth lubrication to the contact parts. In the compressor, a lubricating groove is formed on the outer surface of the eccentric sheave. A hole communicating with the internal oil conduit of the crankshaft is formed in the lubricating groove and supplies oil from the oil conduit to the outer surface of the sheave. Lubricating grooves are also formed on the inner surfaces of the main and sub bearings so as to facilitate oil supply for the contact parts between the crankshaft and the bearings.Type: GrantFiled: May 26, 1995Date of Patent: September 16, 1997Assignee: LG Electronics Inc.Inventors: Seon-Woong Hwang, Chang-Joo Shin
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Patent number: 5632613Abstract: A lubricating device for a horizontal type hermetic compressor. The device includes an oil cylinder at the back of a spring-biased vane in a compressing cylinder, and also includes an oil piston and an oil valve in the oil cylinder. The oil piston communicates with the oil valve by the movement of the vane, thus to achieve the lubrication oil supply through the oil cylinder. The oil piston is biased by a compression coil spring positioned under the piston, so that it is easy to fabricate the compressor. Since the length of the oil piston is longer than the distance between the upper dead point of the oil pumping chamber and the vane slot reference hole, introduction of refrigerant into the oil cylinder is reliably prevented. This device uses a conventional horizontal type hermetic compressor with a slight change of its construction and easily precisely controls the flow rate of the lubrication oil to be delivered.Type: GrantFiled: September 18, 1995Date of Patent: May 27, 1997Assignee: Goldstar Co., Ltd.Inventors: Chang J. Shin, Jong D. Moon
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Patent number: 5616017Abstract: A rotary compressor comprises an outer casing, a rotary type compression mechanism accommodated in the outer casing in a sealed manner, and an electric motor for driving the rotary type compression mechanism. The rotary type compression mechanism is provided with a cylinder having an inner peripheral surface to which a discharge port is formed, and the inner peripheral surface of the cylinder has a portion formed of a valve sheet to which said discharge port is formed.Type: GrantFiled: September 12, 1995Date of Patent: April 1, 1997Assignee: Kabushiki Kaisha ToshibaInventors: Hirokazu Iizuka, Masashi Ohmura, Masataka Kondo, Hideki Kobayashi, Hiroyuki Mizuno, Takaya Yamazaki, Kazuo Shibata
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Patent number: 5616018Abstract: An oil supplying apparatus for a horizontal type rotary compressor capable of securing a substantial oil supplying and preventing oil leakage to the outside thereof thereby enhancing higher oil supplying efficiency of the compressor is disclosed.Type: GrantFiled: April 29, 1996Date of Patent: April 1, 1997Assignee: Goldstar Co., Ltd.Inventor: Young C. Ma
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Patent number: 5605447Abstract: The present invention concerns a noise reduction method and a noise reduction device for a hermetic rotary compressor. It is designed to reduce the very high level of low frequency sound generated by the compressor by preventing the formation of reflected waves along the circumference which produce the resonant sound mode, and thus by preventing the amplification of the low frequency gas pulsations. In the present invention, the amplitude of the reflected waves that form the resonant sound mode is reduced by installing the muffler outlets at one half the wavelength of the reflected waves in the cavity of the compressor housing from the exhaust valve where the compressed gas from the cylinder enters the muffler. By positioning these outlets to face each other so that, of the pulsating gas components form these two outlets, those at the frequency of the reflected waves formed in the circumferential direction of the cavity of the compressor housing will undergo a 180.degree.Type: GrantFiled: July 3, 1996Date of Patent: February 25, 1997Assignee: Carrier CorporationInventors: Han-Jun Kim, In-Soo Hwang
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Patent number: 5564917Abstract: In a high side rotary compressor, interior shell pressure is used to force lubricant from the sump into the compression chamber. The lubricant is delivered only after the suction port has closed and before chamber pressure exceeds shell pressure.Type: GrantFiled: July 5, 1995Date of Patent: October 15, 1996Assignee: Carrier CorporationInventors: Alexander D. Leyderman, Martin M. Mertell, Donald Yannascoli
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Patent number: 5545021Abstract: A hermetically sealed rotary compressor includes a generally cylindrical sealed vessel having an oil reservoir defined therein for accommodating a quantity of lubricating oil, a drive unit within the sealed vessel, and a compressor mechanism within the sealed vessel. The compressor mechanism includes a cylinder having a compression compartment defined therein and also having upper and lower openings, an eccentric cam provided on a crankshaft for rotation together therewith, and a ring-shaped piston mounted on the crankshaft while encircling the eccentric cam and capable of undergoing a planetary motion in contact with the eccentric cam during rotation of the eccentric cam. The cylinder has a refrigerant intake port defined therein in communication with the compression compartment.Type: GrantFiled: December 20, 1994Date of Patent: August 13, 1996Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Hirotsugu Fukuoka, Keisuke Morita, Hiroshi Matsunaga, Shigeru Muramatsu
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Patent number: 5522235Abstract: The invention concerns a reversible rotary compressor which can compress refrigerant in either of the forward and reverse directions, without providing a valve mechanism in a closed container. In a reversible rotary compressor including a cylinder, a rolling piston, and a slide vane, two inlet/outlet ports are formed in a space between the outer surface of the rolling piston and the inner surface of the cylinder in a state that the two inlet/outlet ports are disposed on both sides of the slide vane. The two inlet/outlet ports are closed by the rolling piston when the rolling piston is positioned at the top dead center and fully opened when the rolling piston is positioned at the bottom dead center. Two refrigerant pipes, coupled with the inlet/outlet ports, are provided in the side wall of the cylinder.Type: GrantFiled: April 29, 1994Date of Patent: June 4, 1996Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Fumio Matsuoka, Kisuke Yamazaki, Tomofumi Tezuka, Tetsuya Mochizuki, Yoshihiro Tanabe
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Patent number: 5494423Abstract: A rotary compressor has a compression chamber defined by a rolling piston which is eccentrically rotated in a cylinder by a rotary shaft including an eccentric crank portion, and by a blade which slides in a groove formed in the cylinder and of which the tip contacts an outer-peripheral surface of the rolling piston.Type: GrantFiled: February 17, 1995Date of Patent: February 27, 1996Assignee: Hitachi, Ltd.Inventors: Akihiko Ishiyama, Ken'ichi Kawashima, Hirokatsu Kohsokabe, Shoichi Nakashima, Hideki Yazawa, Hiroaki Hata, Tadashi Iizuka, Kazuo Sekigami, Koichi Sato
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Patent number: 5470214Abstract: A lubricating device for a horizontal type hermetic compressor. The device includes an oil cylinder at the back of a spring-biased vane in a compressing cylinder, and also includes an oil piston and an oil valve in the oil cylinder. The oil piston communicates with the oil valve by the movement of the vane, thus to achieve the lubrication oil supply through the oil cylinder. The oil piston is biased by a compression coil spring positioned under the piston, so that it is easy to fabricate the compressor. Since the length of the oil piston is longer than the distance between the upper dead point of the oil pumping chamber and the vane slot reference hole, introduction of refrigerant into the oil cylinder is reliably prevented. This device uses a conventional horizontal type hermetic compressor with a slight change of its construction and easily precisely controls the flow rate of the lubrication oil to be delivered.Type: GrantFiled: December 14, 1993Date of Patent: November 28, 1995Assignee: Goldstar Co., Ltd.Inventors: Chang J. Shin, Jong D. Moon
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Patent number: 5443376Abstract: A lubricating device for a horizontal type rotary compressor having an oil pumping chamber formed under the vane in the compression cylinder. The oil pumping chamber is provided in the compression cylinder under the vane and has an oil inlet port and an oil outlet port provided on at least one of its side walls. An oil piston is received in the pumping chamber such that it elastically vertically reciprocates in the pumping chamber in accordance with vertical reciprocation of the vane. The piston is biased upwards at the outside of the pumping chamber by a steel wire spring which is connected at one end thereof to the oil piston and at the other end thereof to one of the compression cylinder, the main bearing and the sub bearing. An oil feed pipe is connected between the oil outlet port of the pumping chamber and an oil conduit of the eccentric rotating shaft. A hydraulic diode, of which the upper diameter is not smaller than the lower diameter, may be axially formed in the oil piston.Type: GrantFiled: December 15, 1993Date of Patent: August 22, 1995Assignee: Goldstar Co., Ltd.Inventor: Song Choi
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Patent number: 5409358Abstract: A hermetic compressor for compressing the refrigerant in such a refrigerating systems as in refrigerators, freezers, air conditioners and the like, has a sliding part slidably inserted in one end of a hollow shaft, the hollow shaft is adapted to have a tantgential contact with a pumping cylinder, wherein the rotation of the sliding part according to the rotation of the shaft while the sliding part maintains contact with inside of the pumping cylinder allows to draw in and push out oil inside of the cylinder through a lubrication oil guide, the hollow of the shaft and discharge holes on the shaft to feed to each lubrication parts.Type: GrantFiled: July 30, 1993Date of Patent: April 25, 1995Assignee: Goldstar Co., Ltd.Inventor: Choi Song
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Patent number: 5374171Abstract: A rotary compressor including an orbiting piston is disposed within a cylinder bore. A crankshaft with an eccentric causes the piston to orbit within the cylinder block. Crescent shaped polymeric washers are interfit between the eccentric and cylinder bore endwalls to reduce friction and endplay therebetween. Curved or whorled grooves on the face of the washer reduce frictional contact area and at the same time increase lubricant flow. Compressor noise is reduced by the ability of the washers to act as resilient stops between the eccentric, crankshaft and cylinder endwalls.Type: GrantFiled: April 11, 1994Date of Patent: December 20, 1994Assignee: Tecumseh Products CompanyInventor: Edward A. Cooksey
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Patent number: 5348455Abstract: A rotary compressor including an orbiting piston is disposed within a cylinder bore. A drive shaft with an attached eccentric causes the piston to orbit within the cylinder block. Rotation of the piston is prevented by a pin radially disposed on the piston and slidably engaged through a recess in the cylinder bore. A plastic pinion is interfit about the radially outward end of the pin and disposed within the recess to prevent piston rotation and reduce re-expansion volume.Type: GrantFiled: May 24, 1993Date of Patent: September 20, 1994Assignee: Tecumseh Products CompanyInventors: Todd W. Herrick, Edwin L. Gannaway
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Patent number: 5316455Abstract: The same number of grooves 20 through 27 are provided in end surfaces 19a and 19b of a roller 19. The grooves 20 through 27 have communicating portions 20a through 27a which communicate with an inner peripheral side of the roller 19 and sealed portions 20b, 20c, 20d, 20e, 20f through 27b, 27c, 27d, 27e and 27f each of whose cross-sectional area decreases. Accordingly, the cross-sectional area is decreased in direction in which a lubricating oil flows, and a plurality of oil pressures can thus be obtained. This results in a fixed clearance of roller 19.Type: GrantFiled: January 25, 1993Date of Patent: May 31, 1994Assignee: Matsushita Refrigeration CompanyInventors: Takao Yoshimura, Ichiro Morita, Hideharu Ogahara
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Patent number: 5314318Abstract: A plurality of vane chambers on the back side of vanes are caused to function as pump chambers using the reciprocating movement of the vanes to pressure-feed a lubricating oil to a compressor mechanism unit. A taper hole at one of the vane chambers for drawing the lubricating oil, a hole on another chamber for mitigating back pressure and a taper hole between the chambers are provided to improve the pressure feeding capability. In addition, the lubricating oil having been supplied to the compressor mechanism unit is supplied to the slide surfaces of crank portions from an oil hole of each crank portion through an oil passage at the center of the rotating shaft and is further distributed optimally to slide bearing portions by oil guide grooves.Type: GrantFiled: February 12, 1993Date of Patent: May 24, 1994Assignee: Hitachi, Ltd.Inventors: Hiroaki Hata, Kazuhisa Ichimoto, Kazunori Morita, Junichi Fukayama
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Patent number: 5306128Abstract: A discharge valve device of a rotary compressor comprises a discharge passage formed in the wall of a cylinder for connecting to a compression chamber, a discharge valve for blocking/opening the discharge passage depending upon the gas pressure in the chamber, and a spring for restricting the movement of the discharge valve. The discharge valve moves along a passage wall in contact therewith during travel between its blocking/opening positions.Type: GrantFiled: March 2, 1993Date of Patent: April 26, 1994Assignee: Samsung Electronics Co., Ltd.Inventor: Seok J. Lee
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Patent number: 5302095Abstract: An orbiting rotary-type compressor including an orbiting cylindrical piston member, sealing members, cylinder housing, Oldham ring assembly and motor for permitting orbital movement. Sealing is achieved sliding vanes within slots in the cylinder housing which are sealingly biased toward orbiting piston member by means of springs. An axial compliance and a radial compliance mechanism promotes proper sealing.Type: GrantFiled: August 14, 1992Date of Patent: April 12, 1994Assignee: Tecumseh Products CompanyInventor: Hubert Richardson, Jr.
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Patent number: 5261800Abstract: An object of this invention is to provide a compressor in which the number of components and the number of manufacturing steps are reduced, and a compression element is prevented from being displaced in the casing, whereby the air gap between the rotor and the stator of the motor is held unchanged at all times. In a compressor, a connecting cylinder 11a is formed on the casing 1 having a connecting opening 11 such that it is extended from the connecting opening outwardly of the casing, and an inlet tube 6 has a first press-fitting portion 61 which is press-fitted into a refrigerant suction opening 31a and a second press-fitting portion 62 which is press-fitted into the connecting cylinder 11a. The inlet tube 6 is fixedly secured to the casing 1 by press-fitting it into the refrigerant suction opening 31a and the connecting cylinder 11a, whereby the compression element 3 is prevented from being displaced in the casing.Type: GrantFiled: July 23, 1992Date of Patent: November 16, 1993Assignee: Daikin Industries, Ltd.Inventor: Shunichi Sakae
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Patent number: 5259740Abstract: A rotary compressor comprises a body forming an even number of parallel cylinders arranged equidistantly about an axis within a common plane oriented perpendicularly to the axis. An eccentric roller is rotatably mounted in each cylinder for sucking-in fluid through a respective inflow port and, once having compressed the fluid, discharging the fluid through a discharge port. A vane is disposed in each cylinder and is spring-biased against a respective roller to isolate the inflow port from the discharge port. A motor-driven drive shaft rotates about the axis and is coupled to the rollers by means of gears.Type: GrantFiled: September 30, 1992Date of Patent: November 9, 1993Assignee: Samsung Electronics Co., Ltd.Inventor: Young Youn
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Patent number: 5246356Abstract: The crankcase or cylinder body of a rotary compressor is secured in a shell by a shrink fit thereby providing intimate contact over its entire circumference. To maintain the proper positioning of the crankcase during the shrink fitting process, the outer surface of the crankcase defines a portion of a sphere, specifically the equatorial portion. As a result the spherical surface provides a stable contact surface over a range of positions of the crankcase and the intimate contact changes the frequencies of response of the shell.Type: GrantFiled: December 10, 1992Date of Patent: September 21, 1993Assignee: Carrier CorporationInventor: Tommaso F. Scarfone
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Patent number: 5244366Abstract: The cylinder, having a central axis, has its bore for the rolling piston formed therein perpendicular to the axis. Too, the slot for the sliding vane is traverse the axis, and opens onto the piston bore. A channel formed through the cylinder, at one side of the slot, and another channel formed through the cylinder at the other side of the slot, provide for the admittance and discharge of intake gas and compressed, discharge gas, respectively. The compressor is built up from such a cylinder, with a piston-driving crankshaft, a biased, sliding vane, and bearing-supporting and lubrication-accommodating end cover assemblies.Type: GrantFiled: March 17, 1993Date of Patent: September 14, 1993Assignee: Dresser-Rand CompanyInventor: Scott Delmotte
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Patent number: 5236318Abstract: An adjustable eccentric mechanism for an orbiting rotary compressor comprising an eccentric, disposed within an orbiting roller, pivotally engaging a crankshaft and locking means for locking the eccentric to the crankshaft in a manner permitting adjustment of the eccentricity of the roller. A method of setting the eccentricity of an orbiting roller by swinging the roller around within the cylinder chamber into contact or a specified clearance with the sidewall, then locking the roller eccentric into place.Type: GrantFiled: October 18, 1991Date of Patent: August 17, 1993Assignee: Tecumseh Products CompanyInventor: Hubert Richardson, Jr.
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Patent number: 5230616Abstract: A rotary compressor has an electric motor and a compressing mechanism drivingly connected together by a crank shaft and disposed in a closed housing. The compressing mechanism has a rolling piston rotatable in a cylinder bore and driven by an eccentric portion of the crank shaft. First, second and third balancers are mounted on an end of the crank shaft and on the opposite ends of a motor rotor, respectively. The second and third balancers are formed therein with weight-adjusting holes by which the masses of the second and third balancers are finely adjusted to fall within tolerable ranges.Type: GrantFiled: November 22, 1989Date of Patent: July 27, 1993Assignee: Hitachi, Ltd.Inventors: Yukio Serizawa, Osami Matsushita, Motohiro Shiga, Masatsune Sutou, Hiroaki Hata, Koichi Sekiguchi, Yuukichi Nakada
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Patent number: 5226797Abstract: The invention refers to a hermetic compressor with rotary rolling piston, of the type of high internal pressure inside the shell (1) and small displacement volume, and with its cylindrical chamber, internal to the cylinder block (4), being internally divided by the rolling piston (50,500) and by a sliding vane (9), into suction and discharge chambers with internal pressure being considerably lower than the internal pressure of the shell during most of the rolling piston (50,500) operating cycles. An axial gap for the passage of lubricant oil is provided between the annular faces of the rolling piston (50,500) and the axial end walls (10a, 20a) of the cylindrical chamber. The rolling piston (50,500) presents an external diameter/internal diameter relation of about 1.63 up to 2.22, in order to increase the radial path of the lubricant oil through said axial gaps.Type: GrantFiled: June 19, 1991Date of Patent: July 13, 1993Assignee: Empressa Brasielira de Compressores S/A-EMBRACOInventor: Caio Mario Franco Da Costa
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Patent number: 5222884Abstract: A rolling piston compressor includes substantially cylindrical casing having a variable diameter inner circumferential surface. A radially extending vane recess is formed in the casing. A first lateral surface is defined as a portion of the inner circumferential surface disposed immediately laterally of the vane recess on a first side. A second lateral surface is defined as a portion of the inner circumferential surface disposed immediately laterally of the vane recess on a second side, the second side being opposite to the first side. The first and second lateral surfaces are radially offset relative to each other. A rolling piston is mounted for rotational travel about the inner circumferential surface. A longitudinal contact line is defined between the first and second lateral surfaces across the vane recess. An impact reducer limits the severity of impact between the rolling piston and the second lateral surface during travel of the piston along the contact line.Type: GrantFiled: May 20, 1992Date of Patent: June 29, 1993Assignee: Ingersoll-Rand CompanyInventor: Neville D. Kapadia
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Patent number: 5203686Abstract: The valve assembly for a rotary compressor includes an elongated valve member which rests on pads on each side of the valve seat and includes an intermediate sealing section normally sealing against the valve seat. An elongated valve spring biases the sealing section toward engagement with the valve seat. An elongated spring backer sits on one end of the valve spring and the other end of the valve member. One end of each of the valve member, valve spring and spring backer are bolted to the compressor end plate. The other end of the spring backer permits the corresponding end of the valve member to slide along the end plate as the valve member moves between its open and closed positions, while restraining the end of the valve member from moving away from the end plate. A backer support, positioned between the spring backer and the head of the bolt, spreads the clamping force and defines a line about which the valve member and valve spring flex.Type: GrantFiled: October 23, 1992Date of Patent: April 20, 1993Assignee: General Electric CompanyInventors: Owen H. Scheldorf, Gary O. Scheldorf, James F. Gordon
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Patent number: 5131826Abstract: The rotary machine comprises a cylindrical chamber having a rolling piston rotating therein, the piston rolling against the inside surface of the chamber wall. In normal operation, springs keep a vane pressed against the periphery of the rolling piston. A control device for controlling the piston of the vane comprises a control rod lying in the same plane as the vane. The rod includes a retaining abutment formed at the bottom of the control rod and received in a housing formed inside the vane and including a top wall through which the control rod passes, the top wall co-operating with the abutment and the housing having a vertical extent which is not less than the maximum distance between the peripheral surface of the piston and the casing of the rotary machine, thereby enabling the vane to move freely relative to the abutment when the abutment is in its low position.Type: GrantFiled: November 28, 1990Date of Patent: July 21, 1992Assignee: Elf SanofiInventor: Christian Boussicault
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Patent number: 5129799Abstract: A rotary compressor comprising a cylindrical chamber, a vane slidably mounted in the peripheral cylinder wall and a torsion spring to bias the vane into contact with an eccentrically mounted roller. The spring includes an elongated central portion and a pair of arms extending from the central portion in parallel planes. The arms are curved or radiused in opposite directions. The central portion is connected to the outer edge of the vane while the ends of the arms are connected to opposite side of the cylinder so that the arms exert a torsional force on the central portion.Type: GrantFiled: September 9, 1991Date of Patent: July 14, 1992Assignee: General Electric CompanyInventor: Gary O. Scheldorf
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Patent number: 5116208Abstract: A sliding vane rotary pump which includes a housing having disposed therein a cylinder housing, a roller rotatable mounted in a cylindrical opening of the cylinder housing and bearing plates for closing bottom and top ends of the cylindrical opening. The roller includes a cylindrical tube having an internal space wherein each end of the cylindrical tube is provided with a counterbored surface. A seal ring is disposed within the counterbored surface of each end of the cylindrical tube a width of the seal ring extends over the internal space within the cylindrical tube. The internal space is filled with a pressurized fluid supplied by the compressor. The pressurized fluid in the internal space exerts a biasing force on the seal rings to thereby cause the seal rings to move outwardly from the ends of the roller to form a seal with the bearing plates.Type: GrantFiled: August 20, 1990Date of Patent: May 26, 1992Assignee: Sundstrand CorporationInventor: Charles B. Parme
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Patent number: 5104297Abstract: A rotary compressor has an electric motor and a compression mechanism drivingly connected thereto by a crank shaft including an eccentric portion having flangelike thrust bearing sections and an eccentric pin section on which a rolling piston is mounted for eccentric rotation in a cylinder bore. The eccentric pin section has formed therein at least one axial through-hole for reducing the mass unbalance of the pin section. The crank shaft has formed thereon coaxial sections each concentric to the axis of rotation of the crank shaft and disposed between the eccentric pin section and one of the thrust bearing sections to decrease the axial dimensions thereof and of the eccentric pin section for thereby decreasing the total mass unbalance of the eccentric portion of the crank shaft whereby crank shaft deflection due to mass unbalance is remarkably reduced particularly at a high speed operation.Type: GrantFiled: December 4, 1990Date of Patent: April 14, 1992Assignee: Hitachi, Ltd.Inventors: Koichi Sekiguchi, Yukio Serizawa
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Patent number: 5098266Abstract: A horizontal rotary compressor comprises a sealed shell having a lubricating oil accumulated at a lower part therein; a drive unit included in the sealed shell; a compression unit included in the sealed shell and driven by the drive unit through a crankshaft; the crankshaft having a lubricating oil feeding hole formed therein; a lubricating oil pump for supplying the lubricating oil to the crankshaft to lubricate the compression unit; a discharge muffler which is arranged at the end of the compression unit remote from the drive unit, and which is provided with a lubricating oil passage; the lubricating oil passage having one end opened in the lubricating oil and the other end opened at the lubricating oil feeding hole; and a discharge refrigerant gas passage which is formed to be upwardly inclined in the discharge muffler so as to communicate from the space in the discharge muffler to the lubricating oil feeding passage.Type: GrantFiled: September 6, 1990Date of Patent: March 24, 1992Assignee: Mitsubishi Denki Kabushiki KaishaInventors: Naoshi Takimoto, Yutaka Sato, Hirokazu Kohayakawa, Sou Suzuki, Masaji Hagiwara, Kenji Suzuki, Yoshinori Shirafuji
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Patent number: 5090882Abstract: A rotary compressor has a plate-like hollow vane disposed in sliding contact with a rotary piston. The vane has an internal cavity formed by a plurality of bores each having a substantially rectangular cross-section. The corners of each bore are each formed by a curved concave surface of a radius of curvature which is greater than the thicknesses of the outer walls of the vane. The major side surfaces of the vane are in slidable contact with opposing walls of a vane slot and have surface layers each formed of an oxide film consisting mainly of tri-iron tetraoxide (Fe.sub.3 O.sub.4). The film is finished by smoothing processing, thus attaining a smaller friction between the vane major side surfaces and the vane slot walls and suppressing local wear of the vane slot walls.Type: GrantFiled: July 26, 1990Date of Patent: February 25, 1992Assignee: Hitachi, Ltd.Inventors: Yukio Serizawa, Koichi Sekiguchi, Yasuhiro Oshima, Tadashi Iizuka
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Patent number: 5069607Abstract: A rotary rolling piston compressor having a hermetic shell in which a cylinder is fixedly mounted. A rolling piston is driven by a crankshaft supported by a bearing pair and carried by the rotor of an electric motor whose stator is fixed internally to the shell. The cylinder has a radial slot in which a vane reciprocates. The vane defines compression and suction chambers, limited axially by the internal faces of the bearings and the chambers having discharge and suction orifices, respectively. The internal face of at least one of the bearings is provided with a groove with one end in communication with the compression chamber and the part on the suction chamber side of the vane in communication with a recess provided on the radial slot surface, on the suction chamber side. The recess extends transversely to the direction of the reciprocating displacement of the vane.Type: GrantFiled: June 9, 1989Date of Patent: December 3, 1991Assignee: Empresa Brasileira de Compressores S/A -EmbracoInventor: Caio M. F. N. Da Costa
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Patent number: 5067884Abstract: A unitized structure of a main bearing and a cylinder of a rotary compressor is disclosed. The cylinder is formed integrally with and directly in the main bearing. Further, the inner circumferential corner of the cylinder is shaped in a round form, and the corresponding circumferential corner of the roller is shaped also in a round form. According to the present invention, the fastidious adjusting procedure required in assembling the conventional compressor and the drop of the effciency due to the variation of the clearance between the cylinder and the main bearing are all eliminated, thereby improving the productivity and the product quality.Type: GrantFiled: July 23, 1990Date of Patent: November 26, 1991Assignee: Goldstar Co., Ltd.Inventor: Byung C. Lee
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Patent number: 5039287Abstract: A compressor in which the portion of the suction tube within the housing is rectilinear with a constant diameter and has an internal or external insulating tube, the suction tube being arranged through a positioning socket which is attached to the front cover of the compressor housing and extends inside and outside the housing with the positioning socket outer end being welded around the suction tube at a point away from the housing front cover and from the insulating tube inlet end within the compressor housing.Type: GrantFiled: September 1, 1989Date of Patent: August 13, 1991Assignee: Empresa Brasileira de Compressores S/A-EmbracoInventor: Caio M. F. N. Da Costa
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Patent number: 5022835Abstract: A crankshaft for a hermetic compressor of the type that comprises a piston which is displaced in the interior of a cylinder by action of an eccentric portion of the crankshaft which is rotatively driven by the electric motor of the compressor, so that the outer face of the eccentric portion facing the axial bearing is spaced according to a surface portion defining an inclined outer face portion which produces a hydrodynamic wedge at the crankshaft eccentric portion.Type: GrantFiled: November 21, 1989Date of Patent: June 11, 1991Assignee: Empresa Brasileira de Compressores S/A - EmbracoInventor: Caio Da Costa