With Non-working Fluid Passage In Drive Shaft Patents (Class 418/94)
-
Patent number: 6494696Abstract: A scroll compressor comprising: a vessel; a compressing mechanism provided within said vessel, the compressing mechanism comprising an orbiting scroll and a non-orbiting scroll each having a spiral wrap formed in a base plate and an Oldham ring for preventing the orbiting scroll from rotating around its axis; an oil reservoir provided within a vessel; a crankshaft for transmitting a power for compressing a working fluid; and a frame on which a main bearing for supporting the crankshaft is provided, wherein the crankshaft is provided with oil supply passages for communicating a vicinity of an orbiting bearing and a vicinity of the main bearing, and openings of the oil supply passages in the vicinity of the orbiting bearing and in the vicinity of the main bearing are positioned so that a pressure of an oil film in the orbiting bearing opening generated during an operation of the compressor is higher than a pressure of an oil film in the-main bearing opening generated during an operation of the compressor.Type: GrantFiled: May 14, 2001Date of Patent: December 17, 2002Assignee: Hitachi, Ltd.Inventors: Toshiyuki Terai, Isao Hayase, Masahiro Takebayashi, Isamu Tsubono, Masaki Koyama, Koichi Sekiguchi
-
Patent number: 6484846Abstract: A hermetically sealed motor compressor comprising a housing enclosing a motor stator and rotor. A vertically oriented crankshaft is connected at one end to the rotor and has an offset crankshaft journal at its other end. An oil passage is provided in the journal and an oil pick-up tube has a first straight end projecting into an oil sump. The second straight end portion is axially aligned with the rotation axis of the crankshaft. A helically twisted insert is provided in the second straight end portion and the first and second portions are connected by an S-shaped intermediate portion.Type: GrantFiled: October 25, 2000Date of Patent: November 26, 2002Assignee: White Consolidated Industries, Inc.Inventor: William A. Parker
-
Patent number: 6484847Abstract: A hermetic compressor assembly includes a compressor housing having a quantity of liquid lubricant therein. A compressor mechanism is provided within the compressor housing and a drive shaft is selectively rotatable and operably connected to the compressor mechanism. A liquid lubricant displacement element is engaged to the drive shaft and a support member is attached to the compressor housing. A pivotable magnetic member is provided between the liquid lubricant displacement element and the support member and includes a suction port provided therein. The liquid lubricant displacement element is in fluid communication with the quantity of liquid lubricant through the suction port in the magnetic member. At least a portion of any ferrous particles contained in the liquid lubricant are attracted to and retained by the magnetic member as the liquid lubricant is passed through the suction port of the magnetic member.Type: GrantFiled: November 30, 2000Date of Patent: November 26, 2002Assignee: Tecumseh Products CompanyInventor: Andrew W. Paczuski
-
Patent number: 6464479Abstract: A vacuum pump of the scroll-type has a housing, a first fixed scroll member having an end plate and an involute spiral wrap attached thereto and a second orbital scroll member having an end plate and an involute spiral wrap attached thereto. The scroll members are arranged in the housing such that their respective wraps intermesh so that on orbital movement of the second scroll member relative to the first scroll member a volume of gas will be trapped and urged from one end of the wraps to the other end. A shaft for driving the second scroll member and wherein a member is provided which is adapted to separate the vacuum space in the housing from the shaft and also to prevent the second scroll member from rotating the said member being made from a polymer material.Type: GrantFiled: May 24, 2000Date of Patent: October 15, 2002Assignee: The BOC Group PLCInventor: Alan John Saunders
-
Patent number: 6464480Abstract: An oil spout is drilled in the crankcase of a scroll compressor between the outer seal and the coupling. The oil spout intersects the oil return chamber to redirect a portion of the oil exiting the oil return passage to the lower surface of the orbiting scroll between the outer seal and the coupling. It is preferred that the oil spout be substantially perpendicular to and smaller in diameter than the oil return passage. The oil spout provides a continual flow of additional lubrication to the outer seal and the coupling, preventing excessive wear of the outer seal and improving overall seal reliability.Type: GrantFiled: March 16, 2001Date of Patent: October 15, 2002Assignee: Scroll TechnologiesInventors: David M. Fenocchi, Carlos Armando Zamudio, Paul Edward Murphy
-
Publication number: 20020110471Abstract: A scroll compressor includes an oil supply cross-hole extending radially outwardly to the outer peripheral surface of the base of the orbiting scroll. The cross-hole supplies lubricant against the crankcase towers such that lubricant is supplied to both the Oldham coupling and the seals for the back pressure chamber. The cross-hole is preferably positioned to be between 80° and 90° downstream from the beginning of the orbiting scroll wrap. In this position, adequate oil will be supplied to lubricate the Oldham coupling and the seal, while at the same time, it is unlikely that an undue amount of lubricant will be allowed into the scroll compressor chambers.Type: ApplicationFiled: February 13, 2001Publication date: August 15, 2002Applicant: Scroll TechnologiesInventors: Zili Sun, Robert Carl Witham
-
Publication number: 20020106295Abstract: A horizontal scroll-type compressor is provided with an oil injection fitting that extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed.Type: ApplicationFiled: February 5, 2001Publication date: August 8, 2002Inventors: John P. Elson, Brian R. Butler
-
Patent number: 6428296Abstract: A horizontal scroll-type compressor is provided with an oil injection fitting that extends through the compressor shell and communicates lubricating oil to a lubrication passage in the crankshaft for providing lubricant to the compressor and other components. The oil injection fitting is supplied with lubricant from an externally disposed source.Type: GrantFiled: February 5, 2001Date of Patent: August 6, 2002Assignee: Copeland CorporationInventors: John P. Elson, Brian R. Butler
-
Patent number: 6422844Abstract: To prevent a decrease in capacity of a compressor, and to decrease the quantity of oil contained in discharged gas, and to decrease the quantity of oil discharged to an outside of the compressor. In a screw compressor in which a screw rotor is supported by a low-pressure side bearing and a high-pressure side bearing in a rotor casing and the screw rotor and a driving motor are connected to each other by a coupling, and a drain oil passage is provided to return oil having lubricated the high-pressure side bearing to a low-pressure gas suction side through a through hole formed in a center of the screw rotor, a throttle mechanism is provided in the drain oil passage to inject the oil.Type: GrantFiled: December 28, 2000Date of Patent: July 23, 2002Assignee: Hitachi Air Conditioning Systems Co., Ltd.Inventors: Yasuhiro Hioki, Shigekazu Nozawa
-
Patent number: 6422843Abstract: A scroll compressor includes an oil supply cross-hole extending radially outwardly to the outer peripheral surface of the base of the orbiting scroll. The cross-hole supplies lubricant against the crankcase towers such that lubricant is supplied to both the Oldham coupling and the seals for the back pressure chamber. The cross-hole is preferably positioned to be between 80° and 90° downstream from the beginning of the orbiting scroll wrap. In this position, adequate oil will be supplied to lubricate the Oldham coupling and the seal, while at the same time, it is unlikely that an undue amount of lubricant will be allowed into the scroll compressor chambers.Type: GrantFiled: February 13, 2001Date of Patent: July 23, 2002Assignee: Scroll TechnologiesInventors: Zili Sun, Robert Carl Witham
-
Publication number: 20020067998Abstract: A compressor system includes a housing with a low pressure first chamber and a high pressure second chamber. A motor in the first chamber has a shaft that passes into the second chamber. A compressor in the housing is operably connected to the motor by the shaft. The second chamber contains an oil sump storing lubricating oil for the compressor. A fluid path through the compressor system includes a first orifice in the housing communicating a suction tube with the first chamber, a first fluid passage communicating the first chamber with the compressor suction port, a second fluid passage communicating the compressor discharge port with the second chamber, and a second orifice in the housing communicating the second chamber with a discharge tube. By the action of the compressor, the fluid in the first chamber is maintained at compressor suction pressure and the fluid in the second chamber is maintained at compressor discharge pressure.Type: ApplicationFiled: December 1, 2000Publication date: June 6, 2002Inventors: John Kenneth Narney, David Turner Monk, Thomas Evans Goodnight
-
Patent number: 6398530Abstract: In order to improve a compressor comprising a scroll compressor with a first compressor member and a second compressor member, a drive with a drive motor and an entraining unit which has an entraining member moving on an entraining path and an entraining member receiving means arranged on the second compressor member, wherein the compressor member receiving means is movable in a radial direction in relation to the central axis with a radial degree of freedom in relation to the entraining member, in such a manner that this can be produced as simply as possible and operates as reliably as possible it is suggested that the entraining member have an entraining member surface curved convexly in a direction transverse to the central axis in a direction of rotation, that the entraining member receiving means be non-rotatably arranged in relation to the second compressor member and have an entraining surface which surrounds the entraining member in a ring shape and on which the entraining member surface bears by alwaType: GrantFiled: November 9, 2000Date of Patent: June 4, 2002Assignee: Bitzer Kuehlmaschinenbau GmbHInventor: Thomas Hasemann
-
Patent number: 6394777Abstract: A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the compression side of the casing to the shaft portion of the rotors. The cavities are charged with a fluid and may include a porous wick in order to act similar to a heat pipe for removing the heat generated during pump compression. The heat is transferred to the shaft portion of the rotors. The shaft portion of the rotors extend into a cavity that contains a coolant. A water jacket surrounds the cavity. The heat is transferred from the shaft portion of the rotors to the coolant and then the water jacket for removal. The heat transfer from the shaft portions to the coolant may be facilitated with the use of fins.Type: GrantFiled: December 29, 2000Date of Patent: May 28, 2002Assignee: The Nash Engineering CompanyInventor: Harold K. Haavik
-
Patent number: 6375444Abstract: A scroll compressor has a unique oil supply port for supplying lubricant to both the seals and the Oldham coupling. The oil supply port is positioned at a location such that it will not likely result in undue amounts of lubricant being entrained into the refrigerant leading into the compression chambers. The present invention is thus an improvement over the prior art.Type: GrantFiled: February 14, 2001Date of Patent: April 23, 2002Assignee: Scroll TechnologiesInventor: Todd W. Dewar
-
Patent number: 6361296Abstract: The present invention provides a scroll-type compressor that can supply sufficient lubricating oil without the occurrence of seizure of bearing for an orbiting scroll. In this scroll-type compressor, an annular boss 23 extends downward from the orbiting scroll, and an eccentric pin 53 of a rotating shaft 5 fits into the boss 23 via a bearing 73 and an eccentric bush 54. A gap 58 is provided between the eccentric pin 53 and the eccentric bush 54, and an oil supply path 57 is provided between the eccentric bush 54 and the bearing 73. The lubricating oil flows out of an oil supply hole 52 formed in a rotating shaft 5 and the eccentric pin 53, being supplied to the bearing 73, etc. via the oil supply path 57. In order to sufficiently supply the lubricating oil to the oil supply path 57, a portion 54f extending in an arcuate shape from the upper end face of the eccentric bush 54 forms a protrusion extending upward from the other flat portion 54d.Type: GrantFiled: December 17, 1999Date of Patent: March 26, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Katsumi Hirooka, Hiroyuki Kobayashi, Susumu Matsuda
-
Patent number: 6352418Abstract: A displacement type fluid machine which is easier to machine and assemble than a scroll type fluid machine and has high performance and low cost. A displacer is revolved in a cylinder having an inside wall formed by a curve such that a planar shape is continuous, whereby a working fluid is discharged through a plurality of discharge ports, there is provided a driving unit in which the orbiting radius of the displacer is variable along the shape of a movement line contact portion of the cylinder and the displacer.Type: GrantFiled: March 8, 2000Date of Patent: March 5, 2002Assignee: Hitachi, Ltd.Inventors: Hirokatsu Kohsokabe, Kunihiko Takao, Masahiro Takebayashi, Isao Hayase, Hiroaki Hata, Shigetaroo Tagawa, Kenji Tojo, Takeshi Kouno
-
Patent number: 6328545Abstract: A crankshaft assembly for a scroll compressor. The scroll compressor includes intermeshed and nested stationary and orbiting scroll elements which define at least one spiraling compression pocket therebetween and an orbital drive mechanism for driving the central axis of the orbiting scroll element about the central axis of the stationary scroll element while maintaining the orbiting scroll element substantially non-rotational with respect to the stationary scroll element. The crankshaft assembly of the orbital drive mechanism includes a crankshaft member having an elongated shaft portion for rotation about a central axis of rotation and an orbiting rotational bearing affixed to a first distal end of the crankshaft member. The center of rotation of the orbiting rotational bearing is radially offset with respect to the central axis of rotation of the crankshaft member and is adapted to accept and rotationally engage a hub portion projecting from the orbiting scroll element.Type: GrantFiled: June 1, 2000Date of Patent: December 11, 2001Assignee: Westinghouse Air Brake Technologies CorporationInventors: Michael V. Kazakis, Charlie E. Jones
-
Patent number: 6325603Abstract: A charge cooled rotary engine includes a housing, a first end plate, and a second end plate. The housing and end plates combine too define a closed chamber. A rotor disposed within the housing includes three flanks, a cylindrical hub, and a web extending transversely from the hub and joining medial portions of the flanks to the hub. The web, flanks, and hub form rotor cavities on opposite ends of the rotor. Inlets formed in the end plates for receiving fuel/air charge terminate in entry ports facing the closed chamber. Distribution chambers, formed in the end plates adjacent the entry ports, are open to the closed chamber. The entry ports directly communicate with the rotor cavities and are isolated from direct communication with any of the intake, compression, and combustion chambers by the rotor flanks.Type: GrantFiled: June 24, 2000Date of Patent: December 4, 2001Assignee: Moller International, Inc.Inventor: Paul S. Moller
-
Patent number: 6322339Abstract: A highly reliable scroll compressor adapted to make the amount of a refrigerant taken in through a first suction inlet of a scroll compression element as equal as possible to that taken in through a second suction inlet of the scroll compression element so as to improve the intake efficiency, thereby suppressing pulsation and noise. If the sectional area of the inlet of a refrigerant passage through which a refrigerant taken in flows from an end of a swivel lap via the outer periphery thereof to the second suction inlet is denoted as A1, the sectional area of the inlet of the first suction inlet is denoted as A2, and the sectional area of the inlet of a communication groove is denoted as A3 when the gap between a stationary lap and the swivel lap of the scroll compression element reaches its maximum, then A1, A2, and A3 stay within a range defined by 1.5≦A2/(A1+A3)≦2.5.Type: GrantFiled: September 17, 1998Date of Patent: November 27, 2001Assignee: Sanyo Electric Co., Ltd.Inventors: Toshihiko Mitsunaga, Kenzo Matsumoto, Kazuyoshi Sugimoto, Takahiro Nishikawa, Kazuaki Fujiwara, Kazuya Sato, Takashi Sato
-
Patent number: 6312237Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.Type: GrantFiled: March 6, 2001Date of Patent: November 6, 2001Assignee: Hitachi, Ltd.Inventors: Takeshi Kouno, Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Shigetaro Tagawa, Yasuhiro Ohshima, Kingo Moriyama
-
Patent number: 6305914Abstract: Counterweight size is reduced by removing material from an electric motor rotor for a machine, such as a compressor. The material is removed asymmetrically with respect to shaft centerline to provide maximum benefit. Counterweight size reduction results in decrease of compressor dimensional envelope and weight.Type: GrantFiled: March 27, 2000Date of Patent: October 23, 2001Assignee: Scroll TechnologiesInventor: Alexander Lifson
-
Publication number: 20010031214Abstract: A rotary screw type pump is provided with internal cavities within the rotors. The rotors include shaft portions that extend out from the casing that contains the screw portion of the rotors. The cavities extend from the screw portion of the rotors at the compression side of the casing to the shaft portion of the rotors. The cavities are charged with a fluid and may include a porous wick in order to act similar to a heat pipe for removing the heat generated during pump compression. The heat is transferred to the shaft portion of the rotors. The shaft portion of the rotors extend into a cavity that contains a coolant. A water jacket surrounds the cavity. The heat is transferred from the shaft portion of the rotors to the coolant and then the water jacket for removal. The heat transfer from the shaft portions to the coolant may be facilitated with the use of fins.Type: ApplicationFiled: December 29, 2000Publication date: October 18, 2001Applicant: The Nash Engineering CompanyInventor: Harold K. Haavik
-
Publication number: 20010026766Abstract: A scroll compressor comprising: a vessel; a compressing mechanism provided within said vessel, the compressing mechanism comprising an orbiting scroll and a non-orbiting scroll each having a spiral wrap formed in a base plate and an Oldham ring for preventing the orbiting scroll from rotating around its axis; an oil reservoir provided within a vessel; a crankshaft for transmitting a power for compressing a working fluid; and a frame on which a main bearing for supporting the crankshaft is provided, wherein the crankshaft is provided with oil supply passages for communicating a vicinity of an orbiting bearing and a vicinity of the main bearing, and openings of the oil supply passages in the vicinity of the orbiting bearing and in the vicinity of the main bearing are positioned so that a pressure of an oil film in the orbiting bearing opening generated during an operation of the compressor is higher than a pressure of an oil film in the main bearing opening generated during an operation of the compressor.Type: ApplicationFiled: May 14, 2001Publication date: October 4, 2001Inventors: Toshiyuki Terai, Isao Hayase, Masahiro Takebayashi, Isamu Tsubono, Masaki Koyama, Koichi Sekiguchi
-
Patent number: 6290479Abstract: A scroll compressor is positioned in a housing having an end cap defining an oil sump. A shaft extends towards the oil sump and has an oil pick-up tube. A magnet is positioned on the end cap through a number of embodiments which properly position the magnet adjacent to the oil pick-up tube. In one embodiment a protrusion extends upwardly from the end cap and into an inner periphery of the magnet to position the magnet.Type: GrantFiled: December 15, 1999Date of Patent: September 18, 2001Assignee: Scroll TechnologiesInventors: Vernon E. Friedley, Thomas R. Barito
-
Patent number: 6287099Abstract: A scroll compressor is disclosed. In the disclosed scroll compressor, an oil discharge port is formed at a crankshaft of the scroll compressor for discharging a portion of the oil passing through an oil passage formed through the crankshaft to the outside of the crankshaft, a by-pass means is installed at the oil discharge port for opening or closing the oil discharge port by the centrifugal force of the oil generated by the rotation of the crankshaft, and when the compressor is operated at high speed, a portion of oil passing through the oil passage of the crankshaft can be discharged to the outside of the crankshaft and returns to an oil storing portion. Accordingly, excessive supply of oil to a compression portion is prevented, oil consumption is decreased, and the efficiency of volume of the compressor is heightened.Type: GrantFiled: January 19, 2000Date of Patent: September 11, 2001Assignee: LG Electronics, Inc.Inventors: Young Chang, II, Dong Koo Shin
-
Patent number: 6280164Abstract: A method stabilizes the temperature in a gear pump lubricated with material to be delivered. At least one housing part has at least two slide bearings in which shafts are mounted and are lubricated by medium to be delivered. A medium is adjusted in a temperature stabilizer to a predetermined temperature and then flows firstly through the housing part and secondly through shafts and/or slide bearings to stabilize the temperature.Type: GrantFiled: November 9, 1998Date of Patent: August 28, 2001Assignee: Maag Pump Systems Textron AGInventors: Stefan Kalt, Michael Heinen
-
Patent number: 6258293Abstract: A refrigerating apparatus comprising a refrigeration cycle comprising at least a compressor, a condenser, a dryer, an expansion mechanism and an evaporator, a refrigerant composed mainly of a fluorocarbon type refrigerant containing no chlorine and having a critical temperature of 40° C. or higher, and a refrigerating machine oil comprising as base oil an ester oil of one or more fatty acids which contains at least two ester linkages in the molecule and has a viscosity at 40° C. of 2 to 70 cSt and a viscosity at 100° C. of 1 to 9 cSt.Type: GrantFiled: December 2, 1999Date of Patent: July 10, 2001Assignee: Hitachi, Ltd.Inventors: Tadashi Iizuka, Reishi Naka, Katsumi Fukuda, Makoto Tanaka, Yoshiharu Homma, Hiroaki Hata, Hirokatsu Kousokabe, Koji Nariyoshi, Hiroshi Iwata
-
Patent number: 6247909Abstract: A scroll compressor is provided within a sealed housing. Although the invention is shown with regard to a scroll compressor, it should be understood that aspects of the invention have benefit to any type sealed compressor. A lower bearing is attached directly to a housing end cap. The lower bearing is easily and accurately attached to the end cap, and reduces the complexity and cost of assembly of a sealed compressor. In particular, the end cap is provided with upset portions spaced circumferentially by gaps. The bearing is secured to the upset portions by welding. Oil can flow through the gaps and into a space beneath the bearing such that it can reach oil passages in the shaft.Type: GrantFiled: August 18, 1999Date of Patent: June 19, 2001Assignee: Scroll TechnologiesInventors: John R. Williams, Tracy Milliff, Joe T. Hill, Gene Michael Fields, Michael R. Young
-
Patent number: 6220841Abstract: In a displacement type fluid machine wherein a space is formed by the inner wall surface of a cylinder and the outer wall surface of a displacer when the center of the cylinder is located on the center of the displacer, and a plurality of working chambers is formed when the positional relationship between the displacer and cylinder is for a gyration, the wear is reduced between the cylinder and displacer. Sliding portions between the displacer 5 and a cylinder 4 are fed with a lubricating oil 12 by forming an oil-feeding groove 5c in the surface of the displacer 5 so as to extend from the central portion of the displacer 5 to the vicinity of a suction port 7a, and feeding the lubricating oil 12 from the central portion of the displacer 5, so that the wear can be reduced.Type: GrantFiled: March 16, 1999Date of Patent: April 24, 2001Assignee: Hitachi, Ltd.Inventors: Takeshi Kouno, Hirokatsu Kohsokabe, Masahiro Takebayashi, Shunichi Mitsuya, Shigetaro Tagawa, Yasuhiro Ohshima, Kingo Moriyama
-
Patent number: 6210137Abstract: A scroll fluid machine having a lubrication pump provided between sliding contact surfaces of an orbiting scroll member and a thrust bearing in a casing. The pump has an orbiting member accommodating recess provided in the sliding contact surface of the thrust bearing. An orbiting member projects from the sliding contact surface of the orbiting scroll member into the recess. A slide plate defines a suction chamber and a discharge chamber in the recess. As the orbiting scroll member orbits, the orbiting member orbits in the recess, causing a lubricant contained in the casing to be sucked from a suction passage and delivered to the inside of a boss portion accommodating an orbiting bearing.Type: GrantFiled: December 28, 1999Date of Patent: April 3, 2001Assignee: Tokico Ltd.Inventors: Yoshio Kobayashi, Susumu Sugiura, Kiminori Iwano, Yasuhiko Sekino, Katsushi Hidano, Susumu Sakamoto, Junichi Nagasawa, Toshitsugu Suzuki
-
Patent number: 6196814Abstract: A compressor assembly including a compression mechanism, a rotating crankshaft operably coupled to the compression mechanism, the crankshaft provided with a longitudinally-extending oil conveyance passageway, the oil conveyance passageway in fluid communication with relatively moving interfacing bearing surfaces of the compression mechanism, and an oil pump assembly. The oil pump assembly includes an oil pump body having an interior surface and being rotatable relative to the crankshaft, a vane disposed within the pump body and rotating with the crankshaft, the vane having at least one end in sliding engagement with the interior surface of the oil pump body, and a port plate disposed within the pump body and having rotatably opposite first and second positions. The vane is in sliding engagement with an adjacent surface of the port plate, and the port plate is provided with an inlet and an outlet.Type: GrantFiled: June 17, 1999Date of Patent: March 6, 2001Assignee: Tecumseh Products CompanyInventors: Edward A. Cooksey, Daniel J. Hadesh, Edwin L. Gannaway
-
Patent number: 6193489Abstract: The present invention proposes a shaft assembly mechanism for a scroll compressor. An eccentric portion is installed at the top end of an eccentric shaft. A ring is lagged connectedly to the eccentric portion. A homocentrically arranged through hole is installed in the ring. The ring is lagged connectedly to the eccentric portion of the eccentric shaft via the through hole. A fixing hole is disposed at the bottom end of an orbiting scroll. A bushing is installed fixedly in the fixing hole. A through hole is installed in the bushing. A spiral oil groove for addition of lubricating oil is installed on the inner wall of the through hole of the bushing. The through hole of the bushing is lagged connectedly to the outer side of the ring. A shaft assembly mechanism of low noise, flexible assembly process, and easily controlled accuracy can thus be formed.Type: GrantFiled: November 2, 1999Date of Patent: February 27, 2001Assignee: Rechi Precision Co., Ltd.Inventors: Guang-Der Tarng, Lung-Tsai Chang
-
Patent number: 6190149Abstract: An oil distribution system for machinery such as a vacuum pump is disclosed. The system features an auxiliary oil pump integrally mounted adjacent to one end of the vacuum pump's drive shaft. The drive shaft drives the oil pump and has a longitudinal passage extending substantially along its length in communication with the outlet from the oil pump. Oil ports, positioned at points along the drive shaft adjacent to bearings supporting the drive shaft, extend from the passage. Lubricating oil, drawn from a reservoir by the oil pump, is pumped into the passage. The oil exits the passage via the oil ports and lubricates the bearings. The oil passes into the pump cylinder where it provides an oil seal between the piston and cylinder wall. Either a rotary vane pump or a gerotor-type pump is preferred as the auxiliary oil pump.Type: GrantFiled: April 19, 1999Date of Patent: February 20, 2001Assignee: Stokes Vacuum Inc.Inventor: Jay Richman
-
Patent number: 6179593Abstract: Side wall surface of an orbiting piston and inner wall surface of a cylinder define therebetween a plurality of working chambers, a space for compressing (discharging) a working fluid is defined between spaces for sucking thereinto the working fluid among the working chambers in any operating condition, and one of end plates, between which the orbiting piston is axially interposed, is formed with suction ports or discharge ports while the other of end plates, opposing the end plate formed with the suction or discharge ports, is formed with holes, whereby it is possible to provide a highly efficient and reliable displacement fluid machine which can stabilize pressure balance in the working chambers, and which can greatly reduce fluid loss during discharge stroke.Type: GrantFiled: March 19, 1998Date of Patent: January 30, 2001Assignee: Hitachi, Ltd.Inventors: Shunichi Mitsuya, Hirokatsu Kohsokabe, Masahiro Takebayashi, Koichi Inaba, Hiroaki Hata, Kenji Tojo
-
Patent number: 6174152Abstract: A displacement pump for a relatively high pressure performance environment includes a casing with first and second ends, with rotors driven in the casing to effect pumping. Flushing fluid (such as sealing water or substantially fiber-free foam) is introduced into a clearance between the rotors and the interior surface of the second end of the casing to keep the clearance substantially free of undesirable particles or fibers, typically fibers (such as glass fibers) having greater abrasiveness than cellulose fibers, or fibers (such as synthetic fibers, or synthetic material coating cellulose fibers) having poorer heat resistance than cellulose fibers. The flushing fluid may be introduced into the clearance in a number of different ways as long the clearance is kept substantially free of the undesirable particles or fibers. The flushing fluid is introduced, preferably through a check valve, at a pressure at least slightly higher than the output pressure of the pump.Type: GrantFiled: March 26, 1998Date of Patent: January 16, 2001Assignee: Ahlstrom Paper Group OyInventors: Kay Rokman, Raine Suurnakki
-
Patent number: 6171090Abstract: A compressor assembly including a housing having an oil sump containing a liquid lubricant, a compressor mechanism disposed within the housing, a vertical, rotatable shaft associated with the compressor mechanism and provided with a conduit having a downwardly directed open end extending beneath the surface level of the lubricant and through which oil is conveyed to the compressor mechanism, whereby the lubricant is drawn into the conduit open end, and a guard in surrounding relationship with, and having an aperture disposed beneath and proximate to, the conduit open end, the guard fixed relative to the housing, the sump in fluid communication with the conduit through the aperture.Type: GrantFiled: June 17, 1998Date of Patent: January 9, 2001Assignee: Tecumseh Products CompanyInventor: David C. Hurley
-
Patent number: 6164942Abstract: A charge cooled rotary engine includes a housing, a first end plate, and a second end plate. The housing and end plates combine too define a closed chamber. A rotor disposed within the housing includes three flanks, a cylindrical hub, and a web extending transversely from the hub and joining medial portions of the flanks to the hub. The web, flanks, and hub form rotor cavities on opposite ends of the rotor. Inlets formed in the end plates for receiving fuel/air charge terminate in entry ports facing the closed chamber. Distribution chambers, formed in the end plates adjacent the entry ports, are open to the closed chamber. The entry ports directly communicate with the rotor cavities and are isolated from direct communication with any of the intake, compression, and combustion chambers by the rotor flanks.Type: GrantFiled: December 17, 1998Date of Patent: December 26, 2000Assignee: Moller InternationalInventor: Paul S. Moller
-
Patent number: 6162035Abstract: A helical-blade fluid machine maintains a low-pressure atmosphere in a closed casing (1) and secures a proper lubrication state for a compression mechanism (9). The fluid machine has a drive mechanism (7) that is installed at an upper or lower part of the casing and consists of a stator (11) and a rotor (15). The compression mechanism is installed at the other part of the casing. The compression mechanism has a cylinder (23) and a roller (25), which is swayed with respect to the cylinder by the drive mechanism. A helical blade (39) having unequal pitches is arranged on the roller, to define compression chambers (41). This arrangement lowers the head of lubricant. An intake pipe (5) feeds gas into the casing so that a low-pressure atmosphere fills the casing.Type: GrantFiled: October 2, 1998Date of Patent: December 19, 2000Assignee: Kabushiki Kaisha ToshibaInventors: Makoto Hayano, Hirotsugu Sakata, Akira Morishima, Masao Ozu
-
Patent number: 6158996Abstract: Known designs of single-thread screw rotors in single-piece cast iron constructions having wrap angles of >720 degrees with balancing cavities on the face of the screw operate with no unbalance at average rotary frequencies of (.about.3000 min.sup.-1). The use of a pump in processes having sensitive purity and maintenance requirements or working with corrosive substances or where limited space is available and quality is demanded, brings about problems for rotor designing and balancing, which the present invention solves. An uneven mass distribution is accomplished by constructing the rotors with several single parts inside the rotor, by forming cavities and/or by choosing the adequate material, which, combined with the screw length/pitch ratio, cause a static and dynamic balancing. Screw rotors designed as described offer several advantages since they are easy to assemble and have a compact and stable construction.Type: GrantFiled: February 11, 1999Date of Patent: December 12, 2000Assignee: Ateliers Busch S.A.Inventor: Ulrich Becher
-
Patent number: 6149405Abstract: A double-wrap dry scroll vacuum pump for use as a vacuum pump for nuclear power equipment. The pump has a pump body including a suction port capable of being communicated with a vessel to be evacuated and a discharge port for discharging wrap compressed gas to an outside of the pump body after an operation of gas compression by the progressive volume reduction of a sealed space, formed by a revolving scroll and a pair of stationary scrolls. The pump further includes a pair of enclosing members which cover opposite end portions of a drive shaft and are mounted in a gas-tight state around the revolving scroll. The pump has compressed gas feed ports for feeding compressed gas therethrough to the enclosing members, the compressed gas having a higher pressure than the wrap compressed gas and is discharged together with the wrap compressed gas through the discharge port.Type: GrantFiled: July 28, 1998Date of Patent: November 21, 2000Assignees: Anest Iwata Corporation, Japan Atomic Energy Research InstituteInventors: Tetsuya Abe, Seiji Hiroki, Shuji Haga
-
Patent number: 6139295Abstract: A scroll compressor having a suction chamber into which fluid is received substantially at suction pressure and a discharge chamber from which the fluid is discharged substantially at discharge pressure, including mutually engaged fixed and orbiting scroll members, in fluid communication with the suction and discharge chambers, an intermediate pressure chamber defined in part by one of fixed and orbiting scroll members, an oil reservoir, an electric motor, and a shaft operably coupling the motor and the orbiting scroll member. The shaft is provided with a longitudinal passageway extending longitudinally therethrough, the longitudinal passageway in fluid communication with the oil reservoir and provided with oil therefrom. The shaft is provided with a first passage in fluid communication with the longitudinal passageway and which extends substantially laterally outward from the longitudinal passageway to a radially outer surface of the shaft.Type: GrantFiled: June 17, 1999Date of Patent: October 31, 2000Assignee: Tecumseh Products CompanyInventors: Robert E. Utter, David K. Haller
-
Patent number: 6135738Abstract: 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: GrantFiled: February 28, 1998Date of Patent: October 24, 2000Assignee: Daikin Industries, Ltd.Inventors: Mikio Kajiwara, Yoshitaka Shibamoto, Keiji Yoshimura
-
Patent number: 6129531Abstract: An open drive scroll compressor had a unique lubrication system which includes a vane type oil pump attached to an outer diameter of the drive shaft of the compressor. The oil pump draws oil from an oil sump, sends a first portion of the oil to the components of the compressor needing lubrication and a second portion through a filter. The return to the sump from the filter is restricted to control oil pressure and thus the amount of circulated oil. The scroll compressor includes a first baffle between the oil sump and a counterweight attached to the drive shaft and a second baffle disposed between the scroll members and the oil sump.Type: GrantFiled: December 22, 1997Date of Patent: October 10, 2000Assignee: Copeland CorporationInventors: John Paul Elson, Natarajan Rajendran, Todd Alan DeVore
-
Patent number: 6109897Abstract: A scroll fluid machine is disclosed, which comprises a stationary scroll with an embedded wrap which is spiral in form, extending from a central part of a scroll body toward the outer periphery thereof, and a revolving scroll with an embedded spiral wrap engaging with said spiral wrap, the said revolving scroll having a scroll body coupled to a drive shaft 11A coupled to a drive at the central portion thereof. The drive shaft 11A is cooled directly by cooing means provided inside it. The scroll body of the revolving scroll has a central part coupled to a drive. Heat generated in a process, in which fluid sucked from the scroll edge is led to the central part while being progressively compressed, can be removed at the central part which is elevated to a highest temperature, thus permitting efficient cooling of bearings and seal members near the revolving scroll central part and the drive shaft.Type: GrantFiled: September 28, 1998Date of Patent: August 29, 2000Assignee: Anest Iwata CorporationInventor: Shuji Haga
-
Patent number: 6109900Abstract: A hydraulic pump unit is encased between a pump body and a pump cover. A bearing hole passes through the pump body and is formed in the pump body. A drive shaft and a bearing bush are inserted into the bearing hole. The drive shaft drives the hydraulic pump unit and the bearing bush supports the drive shaft. At an end portion of the bearing hole, a seal chamber is formed. The seal chamber encases a seal member. An oil groove is formed inside the bearing hole. The oil groove connects the hydraulic pump unit side with the seal chamber and carries hydraulic oil for lubrication. The oil groove is formed in such a manner that a sectional area in the seal chamber side is greater than a sectional area in the hydraulic pump unit side. The bearing bush comprises a plurality of bush pieces arranged at a predetermined interval in an axial direction of the bearing hole.Type: GrantFiled: June 5, 1998Date of Patent: August 29, 2000Assignee: Unisia Jecs CorporationInventors: Atsushi Ishizuka, Sachiko Nojyo
-
Patent number: 6106258Abstract: A high-pressure dome type compressor is capable of successfully cooling oil fed to sliding portions during a passage of oil in a drive shaft by discharge gas without causing the oil to be discharged along with the gas. In the drive shaft of a motor disposed in a casing and a moveable scroll of a compression section driven by the drive shaft, there are defined discharge gas passages for discharging, into the casing, compressed fluid compressed in a compression chamber of the compression element. An oil feed passage for oil pumped up from an oil reservoir at a bottom of the casing is defined in the drive shaft so as to be partitioned from the discharge gas passage.Type: GrantFiled: March 6, 1998Date of Patent: August 22, 2000Assignee: Daikin Industries, Ltd.Inventors: Mikio Kajiwara, Yoshitaka Shibamoto
-
Patent number: 6086343Abstract: A scroll compressor is mounted at an angle between vertical and horizontal. In this way, the overall height of the compressor is reduced compared to a vertical compressor. Thus, when only a smaller vertical size is available for mounting, the compressor will be useable. On the other hand, if the compressor were mounted directly horizontally, problems would arise with regard to providing proper lubrication. Since the compressor housing is angled, oil collects at an end of the housing remote from the pump unit. An oil delivery system is also provided including an oil slinger to deliver oil into an oil reservoir. An oil pickup tube associated with the shaft is received in the oil reservoir and delivers lubricant to locations along the shaft as needed.Type: GrantFiled: June 29, 1998Date of Patent: July 11, 2000Assignee: Scroll TechnologiesInventors: Zili Sun, Joe T. Hill, Michael R. Young
-
Patent number: 6079967Abstract: A fluid compressor comprises a sealing case, an oil reservoir formed to an inner bottom portion of the sealing case, in an installed state, for storing an lubricating oil and a compression mechanism having a helical blade structure housed in the sealing case. The compression mechanism comprises a cylinder, a rotating member arranged in the cylinder so as to perform eccentric motion and a helical blade interposed between the rotating member and the cylinder for defining a plurality of partitioned compression chambers. The fluid compressor further comprises an electric motor unit housed inside the sealing casing in operative connection to the compression mechanism. The compression mechanism has a vertical structure in which the fluid is compressed and transferred in a perpendicular direction in the installed state.Type: GrantFiled: December 24, 1997Date of Patent: June 27, 2000Assignee: Kabushiki Kaisha ToshibaInventor: Takayoshi Fujiwara
-
Patent number: 6071104Abstract: A closed compressor includes a closed vessel having an oil sump in which lubricating oil which is incompatible with a refrigerant is accommodated. A compression mechanism, to which a rotary shaft is connected, is accommodated in the closed vessel. An electric motor is also accommodated in the closed vessel for rotating the rotary shaft to drive the compression mechanism. An oil supply pipe is secured to a lower end of the rotary shaft to draw the lubricating oil contained in the oil sump to the compression mechanism. A generally cylindrical partition wall is formed in the oil sump so as to encircle the oil supply pipe and has a plurality of holes to allow the lubricating oil to pass therethrough. The generally cylindrical partition wall may be replaced with a partition wall that laterally partitions the oil sump into two portions. It is preferred that the plurality of holes includes at least vertically spaced first and second rows of holes with the first row being positioned above the second row.Type: GrantFiled: September 4, 1997Date of Patent: June 6, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Takamasa Sakimoto, Shigeru Muramatsu
-
Patent number: 6045343Abstract: A rotary compression equipment includes: a housing having at least two intermeshing hollow rotors rotatably mounted in the housing by two shafts, each rotor formed with a hollow portion for passing a coolant in the hollow portion for cooling the meshing rotors when rotated, and a coolant passage formed in each shaft and fluidically communicated with the hollow portion in the rotor for leading coolant from the coolant passage into the hollow portion in the rotor for removing heat of the rotors outwardly for reducing thermal expansion of the rotary equipment and increasing the efficiency of the rotary equipment.Type: GrantFiled: January 15, 1998Date of Patent: April 4, 2000Assignee: Sunny King Machinery Co., Ltd.Inventor: Ding-Guey Liou