Non-working Fluid Separation Patents (Class 418/DIG1)
  • Patent number: 6135738
    Abstract: In a scroll compressor (A) configured such that an oil is supplied to a compression chamber (14) between fixed and movable scrolls (10), (11) and to bearings (28), (29) for a crank shaft (8), an electric motor (7) and an oil reservoir 1a are placed in a discharge chamber (22), a discharge port (11c) for discharging a gas compressed in the compression chamber (14) is formed in an end plate (11a) of the movable scroll (11), and the crank shaft (8) is provided at the inside thereof with a discharge gas passage (8e) for causing the gas discharged through the discharge port (11c) of the movable scroll (11) to flowinto the discharge chamber (22). The sucked gas is prevented from being heated by a heat loss of the electric motor (7) or the oil thereby increasing the performance of the compressor (A) and a rise in cost for separating the oil from the compressed gas can be prevented.
    Type: Grant
    Filed: February 28, 1998
    Date of Patent: October 24, 2000
    Assignee: Daikin Industries, Ltd.
    Inventors: Mikio Kajiwara, Yoshitaka Shibamoto, Keiji Yoshimura
  • Patent number: 6109902
    Abstract: A liquid-injected compressor with at least two cooperating compressor elements (2 and 3) is provided. The compressor elements are mounted in a housing (1). At least one of the compressor elements is rotatable and is bearing-mounted with a shaft end (7, 8, 13, 14) in the housing (1). The compressor is provided with an inlet (22) and an outlet (17-18-19) which are connected to the inside of the housing (1). The shaft end (14) of the rotatable compressor element (3) is situated in the outlet (17-18-19) in the housing (1). At least one body (20 or 41), made of material which is permeable to gas, is fixed on this shaft (14), forming a filter which practically entirely seals the outlet (17-18-19) and only lets the compressed gas through.
    Type: Grant
    Filed: January 12, 1998
    Date of Patent: August 29, 2000
    Assignee: Atlas Copco Airpower
    Inventors: Joost Goris, Philippe Ernens
  • Patent number: 6102683
    Abstract: The invention relates to a compressor installation (10) with an injection-cooled compressor (12) and a method for compressing a gas in a compressor installation. In order to allow for an environmentally acceptable compression of gaseous media, the compressor system (10) is cooled with oil-free cooling water (25) free of additives. The cooling water injection into the compressor (12) is dosed such that the compression is almost isothermal. Further, a water treatment device (31) for preventing mineral deposits is provided that modifies the cooling water (25) such that the formation of mineral deposits in the cooling circuit is prevented.
    Type: Grant
    Filed: June 23, 1997
    Date of Patent: August 15, 2000
    Inventor: Guenter Kirsten
  • Patent number: 6082981
    Abstract: An oil separator for a compressor according to the present invention is an oil separator (33) for separating oil flowing into a high-pressure chamber (21a) from a low-pressure chamber (21b) with a compression medium in a compressor from the compression medium, and comprises a demister (33a) which is in the form of a net formed by braiding metal thin wires and has surfaces subjected to sandblasting. Due to this structure, an oil separator for a compressor not reducing oil separability also in case of employing an HFC refrigerant and ether oil in combination with each other is implemented. The demister (33a) is formed by performing sandblasting on both front and rear surfaces of a netted strip (33a) and thereafter annularly winding the strip.
    Type: Grant
    Filed: May 27, 1998
    Date of Patent: July 4, 2000
    Assignee: Daikin Industries, Ltd.
    Inventors: Hideyuki Nakajima, Hiroshi Kitaura, Yuji Sakata
  • Patent number: 6059551
    Abstract: A screw compressor capable of increasing a pressure receiving area of a balance piston, employing a thrust bearing having a large load capacity, and preventing an occurrence of a reverse thrust load state when started. The rotor shaft extending beyond both sides of screw rotors 11, 12 is rotatably supported by radial bearings 13, 14. An input shaft 15 serves as a rotor shaft on the suction side. A rotor shaft on the discharge side is rotatably supported by a thrust bearing 16 at a position farther away from the screw rotors 11, 12 than the radial bearing 14. A balance piston 17 is mounted on the rotor shaft at a position farther away from the screw rotors 11, 12 than the thrust bearing 16. A partitioning wall 31 is provided between the thurst bearing 16 and the balance piston 17.
    Type: Grant
    Filed: October 20, 1997
    Date of Patent: May 9, 2000
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Yasushi Amano, Norio Kawaguchi, Takao Ohama
  • Patent number: 6045344
    Abstract: An oil-cooled type screw compressor capable of improving the oil separating efficiency is provided.
    Type: Grant
    Filed: August 6, 1998
    Date of Patent: April 4, 2000
    Assignees: Kabushiki Kaisha Kobe Seiko Sho, Kobelco Research Institute, Inc.
    Inventors: Noboru Tsuboi, Katsuyuki Suzuki, Hideo Utsuno, Yoshitaka Morisawa
  • Patent number: 6010320
    Abstract: In a compressor system, a compressor main unit compresses air taken in and exhausts the compressed air with oil. The compressed air and the oil exhausted from the compressor main unit are stored in a reservoir. A head tank has an internal space and is coupled to the compressed main unit and the reservoir. An oil separator which is installed in the head tank separates the oil exhausted from the head tank from the compressed air.
    Type: Grant
    Filed: July 30, 1997
    Date of Patent: January 4, 2000
    Inventor: Hee-sung Kwon
  • Patent number: 5979168
    Abstract: The position of a screw compressor slide valve in a refrigeration system is controlled using compressor discharge gas sourced from a location where the gas is relatively oil-free and has undergone little or no pressure drop subsequent to its discharge from the compressor's working chamber.
    Type: Grant
    Filed: July 15, 1997
    Date of Patent: November 9, 1999
    Assignee: American Standard Inc.
    Inventor: Dennis M. Beekman
  • Patent number: 5947711
    Abstract: A rotary-screw air compressor having a separator, a cooler fan assembly, and a mounting apparatus. The separator has a first chamber and a second chamber. The first chamber separates compressed air and coolant. The second chamber separates compressed air and moisture. The separator is disposed in a chasm formed by a first platform. The mounting apparatus elevates a motor and air end vertically above and spatially apart from the separator. A cooler fan assembly is vertically above the motor and air end. The cooler fan assembly has a first heat exchanger vertically above a second heat exchanger. A shroud having an opposite open end is connected to the first heat exchanger at one open end and the shroud is connected to the second heat exchanger at the other open end. A cooler fan is disposed completely within the shroud and between the first and second heat exchangers.
    Type: Grant
    Filed: April 16, 1997
    Date of Patent: September 7, 1999
    Assignee: Gardner Denver Machinery, Inc.
    Inventors: Wayne K. Myers, David C. Poole
  • Patent number: 5795136
    Abstract: A rotary screw compressor system is provided wherein the base plate connecting the prime mover to the compressor integrates the drive transmission with the lubricating fluid flow path between lubricating circuit components. Each of those circuit components and the compressor is removably mounted to the base plate via segregating housings. The compressor is mounted to the base plate with drive shaft and working fluid outlet on the same side. A pre-separation chamber is included within the base plate to facilitate removal of lubricant from the compressed working fluid prior to passage of the working fluid through the separator component. A double seal arrangement is provided about the connection of the prime mover drive shaft to the base plate. That seal arrangement includes a lubricant collection chamber between the seals, and control air is used to recycle lubricant from that chamber to the air inlet of the compressor.
    Type: Grant
    Filed: January 8, 1997
    Date of Patent: August 18, 1998
    Assignee: Sundstrand Corporation
    Inventors: Oleif Olsaker, James T. Ferentinos, Dale A. Schultz
  • Patent number: 5765392
    Abstract: The invention shows an improvement in the lubrication of bearings and shaft seals of screw compressors for refrigerants with oils soluble in refrigerants. A typical application results, for example, for ammonia with polyalkylene glycol soluble therein. Due to the fact that a partial oil flow is taken out of the oil flow returned to the screw compressor at an intermediate pressure prior to a pressure reduction to nearly suction pressure of the compressor and conveyed via a vapor separation container, substantial proportions of the dissolved refrigerant can be fed in at an intermediate pressure connection on the compression path of the screw compressor. Correspondingly more advantageous are the lubrication properties of the remaining partial oil flow at the lubrication connection, and the disadvantages of pressure collapse or foam conveyance at an oil pump are absent, since no oil pump is required with a suitable intermediate pressure.
    Type: Grant
    Filed: August 6, 1996
    Date of Patent: June 16, 1998
    Assignee: Sulzer-Escher Wyss GmbH
    Inventor: Ferdinand Baur
  • Patent number: 5733107
    Abstract: A compressor with a compressing device compresses gas containing oil mist. The compressing device includes a compression chamber. A receiving chamber receives the compressed gas discharged from the compression chamber. The receiving chamber has a duct for discharging the gas from the receiving chamber. A hollow cylinder communicates with the duct and projects inside the receiving chamber. The gas directed toward the duct flows around the cylinder to generate centrifugal force for separating the oil mist from the gas.
    Type: Grant
    Filed: August 14, 1996
    Date of Patent: March 31, 1998
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Hayato Ikeda, Tomoji Tarutani, Hirofumi Sato, Norikazu Deto
  • Patent number: 5727936
    Abstract: A rotary displacement compressor having an inlet channel for introducing low pressure gas, an outlet channel through which compressed gas escapes, and at least one rotor mounted in bearings and operating in a working space. The compressor includes a liquid injector for injecting liquid into the working space, a liquid separator provided in the outlet channel for separating liquid from the compressed gas, and a pressure liquid conduit connecting the liquid separator and the liquid injection port. A bearing lubrication circuit includes a tank, a pump, a supply conduit for supplying liquid from the pump to the bearings in which the rotor is mounted, a withdrawal conduit for withdrawing liquid from the bearings to the tank, and a pump inlet conduit for supplying liquid from the tank to the pump.
    Type: Grant
    Filed: December 10, 1996
    Date of Patent: March 17, 1998
    Assignee: Svenska Rotor Maskiner AB
    Inventors: Leif Eriksson, Karlis Timuska
  • Patent number: 5697771
    Abstract: The invention relates to a vacuum pump (1) with an oil separator (42) connected downstream of its outlet (33) and with a duct (45, 46) through which the oil separated in the oil separator (42) is returned to the vacuum pump (1); to feed back the oil in a simple manner, the oil feed duct (45, 46) opens into a duct (47) that supplies gas ballast to the pump (1).
    Type: Grant
    Filed: February 15, 1996
    Date of Patent: December 16, 1997
    Assignee: Leybold Aktiengesellschaft
    Inventors: Lutz Arndt, Winfried Kaiser, Peter Muller
  • Patent number: 5683236
    Abstract: A scroll-type refrigeration compressor has a gas-liquid mixture discharge passage extending through the driver scroll drive shaft for discharging refrigerant gas and entrained lubricant into a high pressure chamber in the compressor housing. An anti-reverse rotation valve is connected to the distal end of the drive shaft and includes a valve housing with radially extending discharge ports and a closure member movable to prevent reverse flow of high pressure gas to the scroll compression chambers to prevent reverse rotation on compressor shutdown. A pressure equalization port may be formed in the valve closure member, valve housing or the distal end of the drive shaft to allow slow bleed down of pressure from the high pressure side to the low pressure side to minimize starting torque of the drive motor. The valve may be formed from a tubular metal housing and having a plug-type closure member slidably disposed therein with the housing being press fitted in a counterbore in the end of the shaft.
    Type: Grant
    Filed: March 21, 1996
    Date of Patent: November 4, 1997
    Assignee: Alliance Compressors
    Inventors: Mark W. Harrison, Peter A. Kotlarek, Charles A. Singletary, John Kenneth Wollitz
  • Patent number: 5678987
    Abstract: A rotary screw compressor having two rotors, liquid injection, a liquid separator (10), and a hydraulic thrust balancing piston (11) connected to at least one of the rotors. In order to vary the balancing force if suction and delivery pressures vary, there is provided first (5) and second (4) throttling devices in the return pipe from the oil separator to the liquid injection port. Between the first and second throttling devices there is a connection to a pipe branch (7) which ends in a cylinder (14) which houses the balancing piston (11). The balancing pressure acting on the balancing piston (11) will thereby vary as suction and delivery pressures vary in a way determined by the relation between the degree of throttling in the two throttling devices.
    Type: Grant
    Filed: April 8, 1996
    Date of Patent: October 21, 1997
    Assignee: Svenska Rotor Maskiner AB
    Inventor: Karlis Timuska
  • Patent number: 5667367
    Abstract: An air compressor includes a compressor unit, an intake regulator valve connected to the compressor unit, and intake filter connected to the intake regulator valve, an oil separator connected to the compressor unit, an oil supply line connecting the lower part of the oil separator to various points inside the compressor unit, and an oil return line connecting the oil collector unit to the passage connecting the intake filter and the intake regulator valve. The passage connecting the intake filter to the intake regulator valve has a section of reduced cross-sectional area, including an inner tube having holes to connect to a surrounding hollow region. The oil return line opens into the passage at a point higher than the level of oil in the intake regulator valve.
    Type: Grant
    Filed: April 5, 1995
    Date of Patent: September 16, 1997
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Kazuo Kubo, Koji Akashi
  • Patent number: 5536153
    Abstract: A non-contact vane-type fluid-displacement machine includes a stator housing having an annular interior surface defining an interior bore and a rotor supported in an eccentric position in the interior bore of the stator housing relative to the annular interior surface thereof to undergo rotation relative to the stator housing about a central rotational axis. The rotor has at least one slot radially defined therein relative to the rotational axis. The machine also has at least one vane disposed in radial slot of the rotor. The vane is mounted to the rotor to undergo reciprocable movement in a radial direction relative to the rotational axis of the rotor such that an outer tip portion of the vane is maintained in a non-contacting substantially sealed relationship with the interior surface of the stator housing. Improved features of the machine relate to a lubricant separator and sump arrangement incorporated in the stator housing of the machine.
    Type: Grant
    Filed: April 10, 1995
    Date of Patent: July 16, 1996
    Inventor: Thomas C. Edwards
  • Patent number: 5509273
    Abstract: The position of a slide valve in a screw compressor in a refrigeration system is controlled using a gaseous medium sourced from the higher pressure one of two or more sources of such fluid. Preferred sources are refrigerant gas in a closed compression pocket in the working chamber of the compressor and refrigerant gas in the discharge passage downstream of the compressor's discharge port. The multiple sources of such gas are connected to a solenoid valve which, when open, permits gas to act on the piston which controls the position of the slide valve. Due to a check valve arrangement, it is always the one of the sources of gas which is at higher pressure that acts on the slide valve actuating piston. The adverse affects of refrigerant gas out-gassing and gas bubble collapse associated with use of hydraulic fluid rather than a gaseous medium to modulate compressor capacity are avoided while advantageous use is made of compressor overcompression in the control of slide valve position.
    Type: Grant
    Filed: February 24, 1995
    Date of Patent: April 23, 1996
    Assignee: American Standard Inc.
    Inventors: Rodney L. Lakowske, Arthur L. Butterworth, Garry E. Andersen
  • Patent number: 5499515
    Abstract: A vane-type rotary refrigerant compressor adapted for use in an air conditioning system is disclosed which includes a rotor fixed on a drive shaft for rotation therewith and disposed in an elliptical chamber of a cylinder block which is enclosed by a housing and whose axial ends are closed by front and rear side plates. The rotor has a plurality of slots in which vanes are slidably received so that a plurality of compression chambers are formed during the operation of the compressor. An oil separator compartment is defined by the housing and the rear side plate, communicating with a discharge chamber into which compressed refrigerant is discharged. In the rear side plate is formed a discharge passage establishing communication between the discharge chamber and the oil separator compartment. The discharge passage has a restricted portion and a bend so as to provide resistance against the flow of the compressed refrigerant for damping its pulsating stream.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: March 19, 1996
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Chuichi Kawamura, Ichiro Kasugai, Mitsuru Hashimoto, Masahiro Ida
  • Patent number: 5494412
    Abstract: An oil delivery prevention device for a horizontal type rotary compressor for use in a refrigerating system. The device effectively separates the mixed gas into oil and refrigerant gas and prevents the oil from delivery along with the refrigerant gas to the refrigerating cycle. The oil delivery prevention device comprises at least three oil separating nets placed in a motor outer space inside a compressor casing and spaced out at regular intervals. Each of the first and third nets comprises a doughnut net part, a shielding plate provided on a center hole of the doughnut net part and an oil port formed on a lower center of the doughnut net part. The second oil separating net comprises a doughnut shielding plate, a net part provided on a center hole of the doughnut shielding plate and an oil port formed on a lower center of the doughnut shielding plate. The spaces formed between the spaced nets prevent interference between the refrigerant gas and the oil.
    Type: Grant
    Filed: April 22, 1994
    Date of Patent: February 27, 1996
    Assignee: Goldstar Co., Ltd.
    Inventor: Chang J. Shin
  • Patent number: 5492461
    Abstract: A flooded compressor system has a compressor unit (10) with intermeshing rotors and a separator (12) for retaining a volume of liquid. The separator (12) is arranged to receive compressed gas and liquid discharged from the compressor unit (10) through an outlet (17) and is formed solely by a single length of pipe of substantially uniform cross section which has a first substantially horizontal portion (19) to retain a liquid pool (18) and a second elevated portion (23) connected to the first portion by a bend in the pipe. A compressed gas outlet (25) leads from the second elevated portion to a separate filter element (14), and a liquid filter element (30) is mounted from, and communicates directly with the first horizontal portion of the pipe.
    Type: Grant
    Filed: August 10, 1994
    Date of Patent: February 20, 1996
    Assignee: Cash Engineering Research Pty. Ltd.
    Inventors: Anthony J. Kitchener, Michael Hinze
  • Patent number: 5476370
    Abstract: In a lubrication system subject to two phase flow, the oil pump is provided with a capacity such that it can always pump sufficient oil plus the refrigerant and/or excess oil. The excess oil and/or outgassed refrigerant is vented to provide the desired lubricant flow.
    Type: Grant
    Filed: November 26, 1993
    Date of Patent: December 19, 1995
    Assignee: Carrier Corporation
    Inventor: Russell E. Wood
  • Patent number: 5466136
    Abstract: A scroll compressor has a closed container 1 with a bottom serving as an oil storage 10 reserving lubricating oil 9. A gas-liquid separator 28 is provided near the closed container 1. An intake pipe 23 is connected to an upper end of the gas-liquid separator 28. An intake gas connecting pipe 29 extends normal to the axial direction of the gas-liquid separator 28 to connect the upper part of the gas-liquid separator 28 with the closed container 1. Meanwhile, a connecting pipe 24 is provided to connect the bottom of the gas-liquid separator 28 with the oil storage 10 in the closed container 1. Furthermore, there in provided a filter 30 between the intake pipe 23 and the intake gas connecting pipe 29. Thus, oil amount introduced into the compressor is reduced. Reliability is increased, and efficiency of air-conditioning apparatus is improved.
    Type: Grant
    Filed: April 26, 1994
    Date of Patent: November 14, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Sadayuki Yamada, Shigeru Muramatsu, Takeshi Hashimoto, Hiroyuki Fukuhara
  • Patent number: 5421708
    Abstract: A high side co-rotating refrigerant scroll compressor includes a motor disposed vertically above its compression mechanism. The discharge of gas from the compression mechanism is through the drive shaft of the drive scroll member which is rotatably supported at its distal end in an upper bearing. Upper bearing lubrication is accomplished by the disentrainment of oil from the mixture of compressed refrigerant gas and oil discharged from the compression mechanism in the vicinity of the bearing and by the direction of such disentrained oil to the bearing.
    Type: Grant
    Filed: February 16, 1994
    Date of Patent: June 6, 1995
    Assignee: Alliance Compressors Inc.
    Inventors: Robert E. Utter, S. Boyd Wall, Charles A. Singletary, Gene M. Fields, Joe T. Hill, John R. Williams
  • Patent number: 5391066
    Abstract: The space in a closed container is divided into two parts by a partition wall member, gas jetting holes through which a high pressure gas released from a compression mechanism section is passed are formed in the partition wall member and a gas collision plate is disposed in opposed relation to the gas jetting holes, and therefore, there is provided a compressor of high achievement factor which is capable of preventing the discharge of oil from the compressor to a refrigerating cycle from being increased even if operated at high rotational frequency.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: February 21, 1995
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Kiyoshi Sawai, Manabu Sakai, Sadao Kawahara, Shotaro Ito, Yoshinori Kojima, Michio Yamamura, Shuichi Yamamoto
  • Patent number: 5310326
    Abstract: A rotary compressor, such as a sliding vane compressor, comprises a housing having a bore, a rotor assembly operatively arranged to rotate within the bore, vanes operatively arranged at the rotor assembly to move linearly relative to the rotor assembly and to form, together with the housing and rotor assembly, variable chambers, and a valve assembly arranged in the housing. The bore has a configuration divided into a expansion region of elliptical shape, a circular transition region, a polynomial-shaped compression region and a circular sealing region. The lubricant seal is composed of an oil injection port and oil grooves for trapping and transporting the oil. The valve assembly is provided in a recess portion of the housing and is configured as a thin blade covering each discharge port which has been relieved to minimize undesirably large difference of the pressure forces between the two sides of the blade. Oil grooves are provided in the rotor assembly and in end cap assemblies.
    Type: Grant
    Filed: September 14, 1992
    Date of Patent: May 10, 1994
    Assignee: Mainstream Engineering Corporation
    Inventors: Fulin Gui, Robert P. Scaringe
  • Patent number: 5304045
    Abstract: A closed type motor-driven compressor includes a motor accommodated in a closed container and a compression mechanism connected through a crank shaft to the motor. A shielding member having a cylindrical portion substantially concentric with the axis of the compression mechanism is disposed between the motor and the compression mechanism. This shielding member defines a shielding air space between the motor and the compression mechanism for preventing a permeation of a lubricating oil. An inlet of a discharge pipe of the closed type motor-driven compressor is positioned inwardly of this shielding air space.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: April 19, 1994
    Assignee: Hitachi, Ltd.
    Inventors: Nobutoshi Hoshino, Kazuo Ikeda, Kooichi Inaba, Shigeya Kawaminami, Atushi Shimada, Tatuya Wakana, Nobuo Abe, Kunio Fukami, Hidenari Takada, Masanori Wakaizumi, Mitsuaki Haneda, Keiji Taguchi, Toshio Yamanaka, Tatuo Horie, Masami Masuda
  • Patent number: 5259741
    Abstract: A device to separate muddy water from slurry which is being drained away and a means to use said muddy water to both seal and lubricate a gap between the guide channels and the vanes of the drainage pump, thereby securing the efficient long-term functioning of the pump. The invention presupposes the use of a vane type rotary drainage pump connected to a separation means which is set up to remove muddy water from the slurry discharged from the discharge port. A pressure chamber is incorporated into said rotor and connection with the inner ends of each of said guide channels. The muddy water separated out by the separation means is fed back into said pressure chamber.
    Type: Grant
    Filed: August 4, 1992
    Date of Patent: November 9, 1993
    Assignee: Engineering Corporation
    Inventor: Kozaburo Nitta
  • Patent number: 5246357
    Abstract: An oil flooded screw compressor including suction, rotor, and discharge sections having suction, intermediate pressure, and discharge ports, respectively, and an oil sump. The discharge section includes radially spaced internal and external housings, with the internal housing receiving an oil-gas stream from the rotor section. A filter is disposed to surround the internal housing, with the filter including a cylindrical, foraminate body portion, an end wall, and a filter pad against the end wall. The oil-gas stream from the rotor section exits the inner housing, via an opening which forms part of a first stage of oil removal. The oil-gas stream strikes the filter pad, removing oil as the oil-gas stream is forced to turn 90 degrees to exit the filter through the foraminate body portion, which also removes oil. The filter functions as second and third stages of oil removal.
    Type: Grant
    Filed: July 27, 1992
    Date of Patent: September 21, 1993
    Assignee: Westinghouse Electric Corp.
    Inventors: Lars I. Sjoholm, Lee J. Erickson, Dean W. Osterman
  • Patent number: 5240391
    Abstract: Suction gas is used to cool the motor of a low-side hermetic compressor. The suction flow is divided. A small amount of the suction flow, e.g. 15%, is diverted to cool the motor and is recombined, via aspiration, with the main flow which is supplied directly to the inlet of the running gear of the compressor.
    Type: Grant
    Filed: May 21, 1992
    Date of Patent: August 31, 1993
    Assignee: Carrier Corporation
    Inventors: Rengasamy Ramshankar, Rudy S. Chou
  • Patent number: 5240392
    Abstract: In a scroll type compressor, a movable scroll is engaged with an immovable scroll so that spaces are formed for taking in a fluid including a lubricating oil mist to be compressed. The movable scroll is revolved around a central axis of the immovable scroll so that, as the spaces are displaced toward a center of the immovable scroll, a volume thereof is reduced to compress the fluid therein. The immovable scroll has a passage through which each of the spaces is communicated with a discharge chamber upon reaching the center, whereby the compressed fluid is successively discharged through the passage into the chamber. An oil-separating plate is disposed in the chamber at a given level lower than the passage, and a reed valve is provided at the passage.
    Type: Grant
    Filed: February 28, 1992
    Date of Patent: August 31, 1993
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Tetsuhiko Fukanuma, Yuji Izumi, Tatsushi Mori, Tetsuo Yoshida
  • Patent number: 5236320
    Abstract: An oil injection type screw compressor includes an oil passage for circulating lubricating oil extending from an oil separator disposed in a discharge passage of a compressor main body through an oil cooler, oil filter and oil pump on the downstream side of the oil pump to parts requiring lubricating oil such as rotors, bearings, shaft sealing members within the compressor main body, the compressor comprising pressure switches for detecting a pressure of a suction passage as a low pressure side, and a pressure of the oil passage between the oil filter and the oil pump as a high pressure side, whereby starting the oil pump when the differential pressure between both the detected pressures is not more than the specified value.
    Type: Grant
    Filed: July 17, 1992
    Date of Patent: August 17, 1993
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Yuji Oishi, Koji Kishimoto, Nobuyuki Maki
  • Patent number: 5219281
    Abstract: There is disclosed a scroll-type machine particularly suited for use as a refrigeration compressor and incorporating an improved baffle arrangement to provide a directed suction inlet as well as to separate oil entrained in the returning refrigerant and return same to the lubricant sump in the lower portion of the shell.
    Type: Grant
    Filed: May 18, 1992
    Date of Patent: June 15, 1993
    Assignee: Copeland Corporation
    Inventors: Jean-Luc M. Caillat, Roger C. Weatherston, James W. Bush
  • Patent number: 5199858
    Abstract: An oil injection type screw compressor which includes an oil tank for separating lubricating oil from gas discharged from a compressor body and collecting the thus separated lubricating oil is constituted such that the oil tank has a substantially L-shaped vertical section composed of a base portion and a column portion provided uprightly on the base portion such that a spacing in the base portion located above an oil storage portion at a lower location in the base portion is formed such that it extends from an upper portion in the base portion to the inside of the column portion, and an oil separating element is provided on the inner side of an exit of gas at an upper portion of the column portion while the compressor body is disposed on the base portion.
    Type: Grant
    Filed: July 24, 1991
    Date of Patent: April 6, 1993
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Noboru Tsuboi, Masaki Matsukuma, Kazuo Kubo, Terumasa Kume, Tsuyoshi Niimura, Atsushi Ikeda
  • Patent number: 5176505
    Abstract: To enable the prevention of smearing an equipment and its periphery with lubricating oil, the alleviation of a burden in maintenance of the equipment by reducing a decrement of the lubricating oil, and the lowering of running cost, an oil-cooled compressor has a suction control valve 5 in a suction passage 3 and an air discharge valve 9 in a discharge passage 6 in a compressor body 1. An oil discharge passage 16 is formed for leading outside the lubricating oil supplied to bearing and shaft seal sections of the compressor body 1, an oil return passage 17 communicating with the inlet side of the suction control valve 5, an oil reservoir section 18 located between the oil discharge passage 16 and the oil return passage 17, and an air discharge passage 19 arranged with one end connected to the outlet port of the air discharge valve 9 and its another end reaching the oil reservoir section 18.
    Type: Grant
    Filed: July 19, 1991
    Date of Patent: January 5, 1993
    Assignee: Kabushiki Kaisha Kobe Seiko Sho
    Inventors: Tsutomu Horii, Kazuo Kubo, Masaki Matsukuma, Terumasa Kume
  • Patent number: 5169298
    Abstract: A constrained rotary vane compressor having a rotor-vane assembly within a stator often exhibits unwanted noise and vibration effects. The present invention offers a design and method to decrease noise and vibration effects of such compressors by the incorporation of an oil skive formed in the interior wall of the stator. The oil skive rids the vane tips of any excess liquid which may have collected on the rotating vanes, which otherwise may impact certain interior regions of the stator resulting in unwanted noise and vibration of the compressor.
    Type: Grant
    Filed: September 6, 1991
    Date of Patent: December 8, 1992
    Assignee: Autocam Corporation
    Inventors: Edward W. Hekman, Frederick A. Hekman
  • Patent number: 5160252
    Abstract: A fluid displacement machine of the vane type which can be operated as a compressor or motor utilizes a cylindrical rotor equipped with one or more tethered sliding vanes wherein the rotor and vane set is rotatably located eccentrically inside an internal conforming casing profile between opposing endplates to define enclosed variable volume compartments. [Each vane is fitted on opposite sides eith tethers which are pivotally-mounted remotely from the vane tips. The tethers engage, through anti-friction means, circular annuli located within the endplates which are eccentric with the hollow casing profile.] Anti-friction tether-to-annuli means are used, one in the form of freely-rotating caged roller bearings interposed between the tethers and the respective internal annuli, and another in the form of tethers equipped with trunnioned bearings which directly engage these internal annular surfaces.
    Type: Grant
    Filed: June 20, 1991
    Date of Patent: November 3, 1992
    Inventor: Thomas C. Edwards
  • Patent number: 5149346
    Abstract: An apparatus for reducing high vibration and pulsation levels generated by he discharge of gas-liquid mixtures from compressors. A tuyere is positioned within the compressor housing to separate the gas from the liquid.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: September 22, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventors: Harry J. Skruch, John R. Ward
  • Patent number: 5134856
    Abstract: A pressurized supply of oil for lubrication and other purposes for a helical screw compressor is automatically and continuously maintained in an oil separator in the compressor discharge line by a check valve assembly which is controlled by the pressure differential between the compressor inlet and the condenser, a bypass around the valve's control element permitting equalization of pressure on its opposite sides to permit closing by a biasing element.
    Type: Grant
    Filed: May 21, 1991
    Date of Patent: August 4, 1992
    Assignee: Frick Company
    Inventors: Joseph W. Pillis, Milton W. Garland
  • Patent number: 5114322
    Abstract: There is disclosed a scroll-type machine particularly suited for use as a refrigeration compressor and incorporating an improved baffle arrangement to provide a directed suction inlet as well as to separate oil entrained in the returning refrigerant and return same to the lubricant sump in the lower portion of the shell.
    Type: Grant
    Filed: January 31, 1991
    Date of Patent: May 19, 1992
    Assignee: Copeland Corporation
    Inventors: Jean-Luc M. Caillat, Roger C. Weatherston, James W. Bush
  • Patent number: 5112201
    Abstract: A scroll compressor apparatus comprising a closed scroll compressor, an oil reservoir vessel separate from the closed scroll compressor, a discharge pipe, and an oil supply pipe. The closed scroll compressor includes a closed container having a suction port through which a compression medium is suctioned, a scroll compression mechanism encased in the closed container, a motor encased in the closed container, a first oil supply passage extending through an end plate of a fixed scroll and through which a first opening facing a sliding contact portion with an orbiting scroll is communicated with an oil supply port, a second oil supply passage formed in an end plate of the orbiting scroll and through which the first opening is communicated with a second opening facing an end face of a driving shaft, and a third oil supply passage, formed in the driving shaft, through which the second opening is communicated with the third opening facing a bearing supporting the driving shaft.
    Type: Grant
    Filed: July 26, 1990
    Date of Patent: May 12, 1992
    Assignee: Hitachi, Ltd.
    Inventors: Takahiro Tamura, Kazuo Sakurai
  • Patent number: 5111712
    Abstract: The crankshaft and orbiting scroll of a scroll compressor are drivingly connected through a bearing. The bearing is made up of a plurality of roller elements of varying diameters in line contact with both the crankshaft and the orbiting scroll and serving to locate the crankshaft and orbiting scroll eccentrically with respect to each other and thereby provide radial compliancy.
    Type: Grant
    Filed: October 6, 1988
    Date of Patent: May 12, 1992
    Assignee: Carrier Corporation
    Inventors: Thomas L. Kassouf, Howard H. Fraser, Jr., Shahrokh Etemad, William R. Lane
  • Patent number: 5099976
    Abstract: A fire extinguishing apparatus is connected to the safety valve on an oil flooded rotary compressor to receive the contents expelled by the compressor due to internal combustion in the compressor. The contents are conducted to the fire extinguishing apparatus, which disperses them in a tank holding a quantity of non-combustible liquid sufficient to cool them. The fire extinguishing apparatus has a tank for holding non-combustible liquid, a perforated plate to disperse the burning oil and gases throughout the non-combustible liquid, an opening to allow the escape of excess pressure from the tank, and a spring loaded lid to prevent evaporation of the non-combustible liquid. A pipe connects the fire extinguishing apparatus to a safety valve and the pipe has temperature and pressure switches on its surface which shut down the compressor when the temperature and/or pressure in the pipe exceed preset limits.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: March 31, 1992
    Assignee: W. B. Jamison Limited Partnership
    Inventor: Will B. Jamison
  • Patent number: 5088897
    Abstract: A swash plate type compressor having a compressor casing accommodating a swash plate operated compressing mechanism compressing a refrigerant gas supplied from a suction side of a refrigerant circulating circuit and discharging a compressed refrigerant gas into a discharge side of the circuit, and an internal lubricating system for lubricating movable elements of the swash plate operated compressing mechanism by using a lubricating oil reserved in a swash plate chamber and an oil sump provided in the bottom of the compressor casing, the compressor casing having a refrigerant and lubricant separating chamber for separating a lubricant component from a lubricant suspended refrigerant gas generated in the swash plate chamber by a high pressure blow-by refrigerant gas and a mist of the lubricant oil when the gas flows from the swash plate chamber toward the suction side of the refrigerant gas circulating circuit, and a refrigerant gas evacuation passageway extended from the refrigerant and lubricant separating ch
    Type: Grant
    Filed: February 28, 1990
    Date of Patent: February 18, 1992
    Assignee: Kabushiki Kaisha Toyoda Jidoshokki Seisakusho
    Inventors: Katsunori Kawai, Hayato Ikeda, Shinichi Ishihara, Kazuhiro Tanikawa, Naoya Yokomachi, Toshihiro Kawai
  • Patent number: 5087178
    Abstract: Air and oil from an oil flooded screw compressor is directed through an air-oil separator. The air is cooled to extract moisture therefrom. Then the cooled air is fed to a drying tower and from the tower the air, together with hot oil from the air-oil separator, is fed to a heat exchanger which heats the air to a desired temperature for use and cools the oil to a desired temperature for re-use by the compressor. The regenerating portion of the tower communicates with the outlet of the heat exchanger for supplying dry heated air as purge air for efficient regeneration.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: February 11, 1992
    Assignee: Rogers Machinery Company, Inc.
    Inventor: Lyle G. Wells
  • Patent number: 5085561
    Abstract: A gas removable pump for liquid comprising a housing having an inlet for introducing the liquid thereinto and an outlet for feeding the liquid therefrom, a drive shaft extending into the housing and having formed therein an axial bore, a rotary pump disposed within the housing, and a discharging chamber defined within the housing and separated from the rotary pump in a liquid-tight manner. The rotary pump includes a rotor secured to the drive shaft for co-rotation therewith and a plurality of cells for feeding the liquid, each cell constituting a separator for gas-rich liquid upon rotation of the rotor. A stationary shaft extends in the axial bore between the rotary pump and the discharging chamber. A connecting arrangement is provided in the drive shaft and stationary shaft for selectively connecting each cell with the discharging chamber. Also provided is an injector for ejecting into the discharging chamber the gas-rich liquid separated in the cells through the connecting arrangement.
    Type: Grant
    Filed: December 7, 1990
    Date of Patent: February 4, 1992
    Assignee: Mitsubishi Oil Co., Ltd.
    Inventors: Hisashi Yano, Junsuke Yabumoto, Akiharu Kitada
  • Patent number: 5082431
    Abstract: A scavenging system for single screw compressors to remove residual liquid eal from an open combustion chamber prior to controlled liquid seal injection. The removal of residual liquid seal is accomplished by providing at least one gaterotor as a scavenging means. Essentially the gaterotor will act as a scraper having a 1:1 compression ratio.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: January 21, 1992
    Assignee: The United States of America as represented by the Secretary of the Navy
    Inventor: Thomas W. Bein
  • Patent number: 5064452
    Abstract: A gas removable pump for liquid comprising a housing having an inlet for introducing the liquid thereinto and an outlet for feeding the liquid therefrom, a drive shaft extending into the housing and a rotary pump disposed within the housing, the rotary pump including a rotor secured to the drive shaft for co-rotation therewith and a plurality of cells for feeding the liquid, each cell constituting a separator for gas-rich liquid upon rotation of the rotor. An ejector is provided for ejecting the gas-rich liquid separated in each cell through a passage formed in the drive shaft and the rotor. Also provided is a valve in the passage for opening and closing the same, the valve being arranged to operate in response to a pressure in the cell. The gas rich liquid gathers at inner portion of the cell due to a centrifugal force and is discharged by means of the ejector through the passage when the valve is in an open position.
    Type: Grant
    Filed: December 13, 1990
    Date of Patent: November 12, 1991
    Assignee: Mitsubishi Oil Co., Ltd.
    Inventors: Hisashi Yano, Junsuke Yabumoto, Akiharu Kitada
  • Patent number: 5055010
    Abstract: A hermetic refrigeration compressor is disclosed which includes a baffle member secured to the inner surface of the outer shell in overlying relationship to a suction inlet port. The suction baffle includes a dome shaped portion centrally disposed with respect to the inlet port and provides axially upper and lower openings defined between the baffle member and the inner surface of the outer shell.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: October 8, 1991
    Assignee: Copeland Corporation
    Inventor: Kent E. Logan