Successive Stages Alternately Produce Work Patents (Class 418/7)
  • Patent number: 8967984
    Abstract: A twin rotary compressor is provided. In the twin rotary compressor, a refrigerant suction pipe may be connected to a middle plate positioned between a first cylinder and a second cylinder to reduce a height of the first cylinder, so that heights of a first rolling piston and a first vane may also be lowered. This may allow a contact area between the first rolling piston and the first vane to be decreased so as to reduce refrigerant leakage from a first compression space of the first cylinder, resulting in improvement of compression efficiency of the compressor.
    Type: Grant
    Filed: December 20, 2010
    Date of Patent: March 3, 2015
    Assignee: LG Electronics Inc.
    Inventors: Yunhi Lee, Seungjun Lee, Minchul Yong
  • Patent number: 8790097
    Abstract: A refrigerant compressor that enhances compressor efficiency by both reducing an amplitude of pressure pulsations and reducing pressure losses in a discharge muffler space into which is discharged a refrigerant compressed at a compression unit. A low-stage discharge muffler space is formed in the shape of a ring around a drive shaft. In the low-stage discharge muffler space, a discharge port rear guide is provided in the proximity of a discharge port through which is discharged the refrigerant compressed by a low-stage compression unit. The discharge port rear guide is provided at a flow path in one direction out of two flow paths from the discharge port to a communication port in different directions around the drive shaft, and prevents the refrigerant from flowing in that direction, thereby causing the refrigerant to circulate in a forward direction in the ring-shaped discharge muffler space.
    Type: Grant
    Filed: May 24, 2010
    Date of Patent: July 29, 2014
    Assignee: Mitsubishi Electric Corporation
    Inventors: Tetsuhide Yokoyama, Toshihide Koda, Shin Sekiya, Kei Sasaki, Raito Kawamura, Taro Kato, Atsuyoshi Fukaya, Takeshi Fushiki, Hideaki Maeyama, Masao Tani
  • Patent number: 8764421
    Abstract: Scroll type fluid machinery, in which two stationary scrolls (2A, 2B) are fixed onto a housing (1), and form volume changing mechanisms (50A, 50B) with matching orbiting scrolls (3A, 3B). Three orbiting units (40) are located between the two volume changing mechanisms. Each orbiting unit comprises a rotating member (10) and a thrust-cancelling shaft (20). Assembly sets of the thrust-canceling shaft consist of turning elements and a connector, which in turn connects with orbiting scrolls through threads. There exists only circumferential constraint but no axial constraint between the connector and the turning element. Rotating turning element will rotate the connector, and thus move the two orbiting scrolls closer or farther through the threads on the connector. The rotating member of this invention further provides a larger space to the supporting bearings (14A, 14B) of the thrust-canceling shaft, and also eases component manufacturing, machinery's assembly and adjustment, and bearings' cooling.
    Type: Grant
    Filed: November 6, 2008
    Date of Patent: July 1, 2014
    Assignee: Shanghai Universoon AutoParts Co.
    Inventors: Enjiu Ke, Ji Ke
  • Patent number: 8529231
    Abstract: An apparatus includes a rotation body having one or more rotary shafts having projections, and a cleaning part disposed adjacent to the projections, having one or more rotation holes into which the one or more rotary shafts are inserted, respectively, and configured to flow a cleaning material into the one or more rotation holes.
    Type: Grant
    Filed: February 8, 2010
    Date of Patent: September 10, 2013
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tea-Jin Park
  • Patent number: 8398386
    Abstract: A 2 stage rotary compressor is provided that includes a hermetic container that defines an outward appearance of the compressor; a 2 stage compression assembly provided in the hermetic container, wherein a low pressure cylinder, a middle plate, and a high pressure cylinder are successively stacked from any one of upper and lower portions; and first discharge port that discharges refrigerant compressed in the low pressure cylinder, and having an inner volume equivalent to 0.5% to 2.5% of an inner volume of the low pressure cylinder. A valve is installed on or under the discharge port. When the valve is opened, compressed refrigerant is discharged through the discharge port. When the valve is closed, refrigerant remains in the discharge port as much as the volume of the discharge port. Accordingly, refrigerant remaining in the discharge port is re-expanded in the cylinder, to thereby cause a compression loss.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: March 19, 2013
    Assignee: LG Electronics Inc.
    Inventors: Jeong-Min Han, Sang-Myung Byun, Sang-Mo Kim, Joon-Hong Park
  • Patent number: 8398387
    Abstract: A fluid machine (101) includes a first compressor (107) and a second compressor (108). The first compressor (107) has a first closed casing (111), a first compression mechanism (102a), an expansion mechanism (104), and a shaft (113). A first oil reservoir (112) is formed in the first closed casing (111). The second compressor (108) has a second closed casing (125) and a second compression mechanism (102b). A second oil reservoir (126) is formed at a bottom portion in the second closed casing (125). The first closed casing (111) and the second closed casing (125) are connected to each other by an oil passage (109) so that a lubricating oil can flow between the first oil reservoir (112) and the second oil reservoir (126). An opening (109a) of the oil passage (109) on a side of the first closed casing (111) is located above the expansion mechanism (104) with respect to the vertical direction.
    Type: Grant
    Filed: May 21, 2009
    Date of Patent: March 19, 2013
    Assignee: Panasonic Corporation
    Inventors: Yu Shiotani, Hiroshi Hasegawa, Takeshi Ogata, Shingo Oyagi, Masanobu Wada, Osamu Kosuda
  • Patent number: 8342825
    Abstract: The present invention provides a 2 stage rotary compressor (100) including a hermetic container (101), a 2 stage compression assembly provided in the hermetic container, wherein a low pressure compression assembly (120), a middle plate (130) and a high pressure compression assembly (140) are successively stacked from any one of upper and lower portions, a first discharge port (124) for discharging middle pressure refrigerant compressed in the low pressure compression assembly (120) a second discharge port (162p) for discharging high pressure refrigerant compressed in the high pressure compression assembly (130) and a third discharge port (172p) positioned at any one of the upper and lower portions of the 2 stage compression assembly to discharge high pressure refrigerant compressed in the 2 stage compression assembly to the hermetic container (101), wherein an area of the third discharge port (172p) is larger than 0.5 times of an area of the first discharge port and smaller than 1.0 times thereof.
    Type: Grant
    Filed: March 31, 2008
    Date of Patent: January 1, 2013
    Assignee: LG Electronics Inc.
    Inventors: Sang-Myung Byun, Seung-Jun Lee, Yun-Hi Lee, Yoon-Sung Choi
  • Patent number: 8202070
    Abstract: A positive displacement rotary machine with a body having an internal spherical cavity, a rotor, and a ring working cavity formed by the body and the rotor. The working cavity is functionally divided into bypass and propulsion halves. A separator embodied in the form of a wobble plate is mounted in the working cavity at an angle to the rotor. A piston with a sealable through-slot for the separator passage is mounted in a slot made in the rotor. Multiple openings made through the separator in the propulsion half of the cavity make the separator transparent for the working medium flow. The openings are small enough so the separator seals the through-slot of the piston. The configuration allows for one input port and one output port on the opposite sides of the separator in the bypass half to make the supply steady.
    Type: Grant
    Filed: June 5, 2007
    Date of Patent: June 19, 2012
    Inventors: Alexandr Vladimirovich Didin, Ilya Yakovlevich Yanovsky
  • Patent number: 8192183
    Abstract: The aim of the invention is to provide a simple, smoothly running pump, especially a slurry pump, preferably for concrete, which comprises a driven rotor (4) rotating inside a housing (2). According to the invention, the rotor (4) is configured as a polygonal, prismatic body wherein at least the connecting lines of the corners of the base form an equilateral polygon. The rotor performs a rotational movement about its center axis on an orbit, the longitudinal edges of the prismatic body (4?) touching the longitudinal inner wall surface (2?) of the housing (2).
    Type: Grant
    Filed: October 29, 2005
    Date of Patent: June 5, 2012
    Inventor: Herbert Jung
  • Patent number: 8087912
    Abstract: A crankshaft is to be provided that allows its assembly process to be simplified, work hours required for the assembly process to be shortened and a manufacturing cost to be reduced. The crankshaft is provided with first eccentric section and second eccentric section at respective ends while interposing a shaft section therebetween and has such a shape that a peripheral edge of the first eccentric section and/or the second eccentric section is positioned radially inside of a peripheral edge of the shaft section.
    Type: Grant
    Filed: January 16, 2008
    Date of Patent: January 3, 2012
    Assignee: Mitsubishi Heavy Industries, Inc.
    Inventors: Hajime Sato, Yoshiyuki Kimata
  • Patent number: 8083507
    Abstract: Provided is a vacuum pump having a rotation body cleaning unit. The vacuum pump includes a case provided with rotation guide holes at opposite end parts. The case includes a rotation body placed inside the case and including a rotation shaft having opposite ends rotatably supported by the rotation guide holes and a number of lobes provided in the rotation shaft at predetermined intervals. Further, a cleaning part is supported by the case and placed in a space between the lobes and cleans the rotation body.
    Type: Grant
    Filed: March 17, 2008
    Date of Patent: December 27, 2011
    Assignee: Samsung Electronics Co., Ltd.
    Inventors: Tea-Jin Park, Seung-Ki Chae, Kwang-Myung Lee, Sang-Gon Lee
  • Patent number: 7748970
    Abstract: In an embodiment, a vacuum pump is capable of preventing adhesion of by-products to its surfaces. The vacuum pump includes a stator. The stator includes a cylinder wall and a pair of diaphragms disposed at opposite ends of the stator. A rotary shaft passes through the diaphragms, and a lobe is attached to the rotary shaft in the stator. The lobe may include a fluid port, and the fluid port may be disposed in sidewalls of the lobe to face the diaphragms. The rotary shaft may include a fluid supply path in communication with the fluid port.
    Type: Grant
    Filed: September 28, 2007
    Date of Patent: July 6, 2010
    Assignee: Samsung Electronics Co., Ltd.
    Inventor: Tea-Jin Park
  • Publication number: 20090193841
    Abstract: A turbo compressor including: multiple stages of compression devices arranged in series with respect to a gas passage, each of the compression devices including an impeller that rotates about an axis; an oil tank capable of supplying lubricating oil to a sliding portion of the compression devices; partitioned intermediate space formed so as to communicate with the passage in an upstream side of the compression devices via the gaps therebetween; and a pressure equalizer provided so as to continuously connect the intermediate space and the oil tank, wherein a compression process is sequentially conducted by suctioning the gas in the passage.
    Type: Application
    Filed: February 4, 2009
    Publication date: August 6, 2009
    Inventor: Noriyasu SUGITANI
  • Publication number: 20090193843
    Abstract: A turbo compressor has a plurality of stages of compression means, each including an impeller and a diffuser, arranged in tandem with the flow of a fluid, and is capable of compressing the fluid sequentially in a plurality of the compression means and supplying the fluid compressed in the compression means in a final stage to a condenser. The diffuser of at least the compression means in the final stage is a vaneless diffuser which does not include diffuser vanes which reduce the turning speed of the fluid in the diffuser. As such, according to this turbo compressor, it is possible to reduce generation of noise resulting from the transmission of turbulence of the fluid to the condenser, which occurs as the refrigerant collides against the diffuser vane.
    Type: Application
    Filed: February 6, 2009
    Publication date: August 6, 2009
    Inventor: Minoru Tsukamoto
  • Publication number: 20080206082
    Abstract: A closed compressor includes a closed case in which a plurality of compression mechanism sections are accommodated, the compression mechanism section having a cylinder including a cylinder chamber eccentrically rotatably accommodating a roller, the compression mechanism section including a blade having a leading edge to divide the cylinder chamber into two parts along a direction in which the roller rotates, the compressor including a high-pressure refrigerant introducing mechanism guiding a high-pressure refrigerant into the cylinder chamber and separating the blade from the roller, the compressor being configured to switch between a high-capacity operation in which all the compression mechanism sections perform a compression operation and a low-capacity operation in which the blade in the compression mechanism section is separated from the roller and thus prevented from performing the compression operation, the high-pressure refrigerant introducing mechanism including a high-pressure refrigerant storage sec
    Type: Application
    Filed: February 21, 2008
    Publication date: August 28, 2008
    Inventor: Izumi Onoda
  • Publication number: 20080019855
    Abstract: A controller for a motor cleans, as necessary, a hydraulic chamber that generates hydraulic oil for changing a phase difference between two rotors so as to restrain sludge from building up in the hydraulic chamber. A motor has a first rotor and a second rotor that can be relatively rotated with respect to the first rotor. The controller includes a phase difference changing driver that changes the phase difference between the two rotors by controlling the pressure in the hydraulic chamber filled with hydraulic oil. The controller further includes a cleaning need determiner that determines the need for cleaning the hydraulic chamber, and a cleaning phase difference controller that controls the phase difference changing driver such that the second rotor is relatively rotated in the forward direction and the reverse direction alternately with respect to the first rotor if a determination result of the cleaning need determiner is affirmative.
    Type: Application
    Filed: July 18, 2007
    Publication date: January 24, 2008
    Inventors: Hirofumi Atarashi, Kazuyuki Iwata
  • Publication number: 20070296296
    Abstract: A motor includes inner-peripheral and outer-peripheral rotors which rotate coaxially and have permanent magnets along a circumference of each rotor; and a phase varying device for relatively rotating the rotors so as to vary a relative phase therebetween. The device has a forward-angle working chamber for relatively rotating the inner-peripheral rotor forward with respect to the outer-peripheral rotor, by using pressure of supplied working fluid; a backward-angle working chamber for relatively rotating the inner-peripheral rotor backward with respect to the outer-peripheral rotor, by using pressure of supplied working fluid; a passage switching valve for performing distribution with respect to supply and drainage of the working fluid between the working chambers in accordance with the position of a spur; and an electromagnetic pressure control valve for controlling pressure of the working fluid, and for controlling the position of the spur in the passage switching valve based on the controlled pressure.
    Type: Application
    Filed: April 30, 2007
    Publication date: December 27, 2007
    Inventors: Jun Masuda, Ryo Ninomiya
  • Patent number: 5257919
    Abstract: A positive displacement fluid handling apparatus comprises a pair of cylindrical cavities with circular cylindrical walls connected to one another by a connecting flow passage and respectively open to an inlet and an outlet flow passages, wherein each of the two cylindrical cavities includes a hub coaxially and rotatably disposed therein and a vane radially extending from the hub to the circular cylindrical wall of the cylindrical cavity, and a hollow circular cylindrical shell encircling the hub disposed eccentrically therein tangentially to the cylindrical wall of the cylindrical cavity and rotatably about the central axis of the hollow circular cylindrical shell that includes an axially disposed slit engaged by the vane in a sliding relationship; wherein the rotating motions of the two hubs respectively included in the two cylindrical cavities are positively coupled to one another in such a way that the two vanes respectively included in the two cylindrical cavities revolve at the same speed and the radial
    Type: Grant
    Filed: March 6, 1992
    Date of Patent: November 2, 1993
    Inventor: Hyok S. Lew
  • Patent number: 4009573
    Abstract: A rotary positive displacement, hot gas regenerative engine having at least two cylindrical rotors, each of which is disposed within an elliptical stator. The longitudinal axis of one rotor is in registration with the longitudinal axis of the other rotor. The longitudinal axis of one stator is offset from and is in spaced parallel relationship with the longitudinal axis of the other stator. The longitudinal axes of the rotors are in spaced parallel relationship with the longitudinal axes of the stators. The rotors, which are mounted on a common shaft, are provided with a plurality of radially extending slidable vanes that form a plurality of expansion chambers and a plurality of compression chambers in each rotor-stator pair. The longitudinal axis of the rotor in each rotor-stator pair is offset from the longitudinal axis of the stator of that rotor-stator pair so that the volume of the expansion chambers is greater than the volume of the compression chambers.
    Type: Grant
    Filed: December 2, 1974
    Date of Patent: March 1, 1977
    Assignee: Transpower Corporation
    Inventor: Ronald W. Satz