Liquid Pool Sealing Relatively Movable Chamber Walls Patents (Class 92/83)
  • Publication number: 20080230998
    Abstract: A sealing system for two components which can be moved in relation to one another, in particular for a piston which can be moved in a cylinder chamber or for a piston rod, is disclosed. The sealing system has two or more moving seals. An ionic liquid is arranged between at least two of the moving seals.
    Type: Application
    Filed: July 4, 2006
    Publication date: September 25, 2008
    Applicant: Linde Aktiengesellschaft
    Inventors: Robert Adler, Georg Siebert
  • Patent number: 6863510
    Abstract: Disclosed is a vacuum preventing device for a scroll compressor comprising: a chamber formed at one side of a fixed scroll and having a suction hole, a compression hole, and a discharge hole at an inner circumference surface thereof; an open/close member installed in the chamber and having a seal oil groove at an outer circumference surface thereof for selectively connecting the discharge hole to the suction hole; and an elasticity member installed in the chamber for providing an elasticity force to the open/close member. The device can enhance a compression efficiency of the compressor by preventing gas leakage efficiently and reduce a fabricating cost by improving a design of a clearance and enhancing a tolerance limit range.
    Type: Grant
    Filed: January 9, 2003
    Date of Patent: March 8, 2005
    Assignee: LG Electronics Inc.
    Inventor: Yang-Hee Cho
  • Patent number: 6598512
    Abstract: The invention relates to a piston pump, for instance for an electrohydraulic vehicle brake system. The invention proposes that a pump piston, on an end toward an eccentric element, be sealed off with a sealing ring, such as a quad ring, that has two axially spaced-apart sealing lips, which sealing ring has radial openings, and also proposes that interstices between the axially spaced-apart sealing lips be connected, through a fluid line, to a fluid supply container from which the piston pump aspirates fluid, or to a pump inlet, whereby in the event of a leak of a sealing lip, the piston pump will aspirate brake fluid through the fluid line and prevent the piston pump from aspirating air from the direction of an eccentric element.
    Type: Grant
    Filed: August 29, 2001
    Date of Patent: July 29, 2003
    Assignee: Robert Bosch GmbH
    Inventor: Heinz Siegel
  • Patent number: 6506032
    Abstract: An object of the present invention is to provide a high-efficiency and reliable linear compressor in which even when a pressing force is applied to its piston, the piston is turnably connected and supported through a connecting rod so that sliding surface pressure between the piston and a cylinder is not increased. The invention provides a linear compressor comprising a cylinder supported in a hermetic vessel by a support mechanism, a piston slidably supported by the cylinder along its axial direction, a spring member for applying an axial force to the piston, a connecting mechanism for connecting the piston and the spring member with each other, and a linear motor having a stator coupled to the cylinder and a moving member coupled to the piston, wherein and the connecting mechanism is connected to the piston such the connecting mechanism can rock with respect to the piston.
    Type: Grant
    Filed: February 12, 2001
    Date of Patent: January 14, 2003
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Sadao Kawahara, Teruyuki Akazawa
  • Patent number: 5086691
    Abstract: A high-performance, robust gas-compression device of long-term reliability is adapted in particular for storing nitrogen gas under compression, and includes a substantially cylindrical body (1), a piston (4) partially projecting into the gas-storage chamber (2), upper (7) and lower (6) piston guiding sleeves surrounding the piston, a lubrication chamber (9) formed in one of the guiding sleeves, adapted for holding a lubrication fluid for lubricating the guiding sleeves, and respective annular sealing joints (14, 19) which are accomodated in the guiding sleeves. One annular sealing joint is formed with an annular groove in communication with the principal gas-storage chamber, thereby exposing that sealing joint to a pressure prevailing in the principal gas-storage chamber; the other sealing joint is exposed to a constant pressure from the lubricating fluid.
    Type: Grant
    Filed: October 19, 1990
    Date of Patent: February 11, 1992
    Assignee: Societe des Usines Quiri & Cie
    Inventor: Didier von Hatten
  • Patent number: 4991495
    Abstract: In order to increase the delivery pressure of the reciprocating pump-actuating mechanism of hydraulic feed pumps having a high pumping capacity, stacks of thin spacer discs are provided on either side of a sealing ring sealingly engaged in a sealing position between the plunger and the cylindrical bushing, said stacks of spacer discs being axially movable along the plunger in the normal non-sealing position. A pressure-distributing bushing is disposed between the stack of spacer discs which faces the free end face of the plunger and the sealing ring, said pressure-distributing bushing rapidly compensating the pressure between said stack of spacer discs and the end face of the pressure-distributing bushing facing the sealing ring.
    Type: Grant
    Filed: October 4, 1989
    Date of Patent: February 12, 1991
    Inventors: Charles Loegel, Sr., Isabelle Durr, Sylvie Reichert, Patrick Loegel, Francine Schneider, Charles Loegel, Jr.
  • Patent number: 4944498
    Abstract: In a gas spring the piston rod is guided through one end of a container. Adjacent to this one end two sealings are provided in axial direction one behind the other, namely an axially outer sealing and an axially inner sealing. A liquid chamber is defined between the axially outer sealing and the axially inner sealing. The axially inner sealing comprises a sealing ring of elastomeric material. This sealing ring comprises a radially outer root portion and a radially inner lip portion. The root portion engages an internal circumferential surface of the container tube. The lip portion engages an external circumferential surface of the piston rod. The axial dimension of the root portion is substantially larger than the axial dimension of the lip portion. The sealing ring may be deflected by pressure differences on both sides of the sealing ring such that a fluid exchange is possible between both axial sides of the sealing ring when the pressure difference exceeds a predetermined value.
    Type: Grant
    Filed: July 13, 1988
    Date of Patent: July 31, 1990
    Assignee: Stabilus GmbH
    Inventors: Bernd Kortgen, Helmut Morgen, Heinz-Josef Heinrichs, Castor Fuhrmann, Herbert Freitag
  • Patent number: 4870821
    Abstract: In a sealing mechanism for a reciprocation apparatus for use in a cycle engine having a reciprocation member (108), such as Stirling engine, oil or a fluid is enclosed in a fluid room constituted by a pair of flexible partioning members (112, 113) such as diaphragms or multiple bellows and side walls (111a, 111b) of a cylinder (111) or the like, and the fluid room is divided in two parts (114, 115) by a pressure-resistive sealing member (116) fixed to inside wall of a rigid partion wall (111f) to roughly seal the fluid allowing sliding motions of the reciprocating member therein.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: October 3, 1989
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Terumaru Harada, Kenichi Inoda, Tatsuo Fujita, Kinichi Adachi
  • Patent number: 4858439
    Abstract: A stroke variable device comprising a large diameter cylinder and a small diameter cylinder which are interconnected to each other. A large diameter piston and a small diameter piston are slidably inserted into the large diameter cylinder and the small diameter cylinder, respectively, and a cylinder chamber is formed between the inner end of the large diameter piston and the inner end of the small diameter piston. A first seal member is arranged to surround the projecting outer end of the large diameter piston, and a second seal member is arranged to surround the projecting outer end of the small diameter piston. One end of the first seal member is fixed to the projecting outer end of the large diameter piston, and the other end thereof is fixed to the housing of the device to form a first hermetically sealed chamber therein.
    Type: Grant
    Filed: February 17, 1988
    Date of Patent: August 22, 1989
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Daisaku Sawada, Takeshi Takahashi
  • Patent number: 4856414
    Abstract: A method of packing elongated porous bodies moved between zones of different pressure, wherein the porous body (T) reciprocates through a pressurized packing agent (M). The packing agent is thixotropic and is supplied continuously to the porous cable (T) under a pressure exceeding the pressure in a higher pressure zone (P.sub.1) while the porous body (T) is impregnated with a thixotropic packing agent (M) such that the cross-section of the cable, throughout its entire length, is filled with packing agent (M). A hydraulic cylinder-type actuator utilizes a porous cable power transmission element packed in a chamber (7) filled with viscoelastoplastic material and communicated with means designed to develop in said chamber a pressure exceeding the pressure of the actuator working fluid.
    Type: Grant
    Filed: December 19, 1985
    Date of Patent: August 15, 1989
    Assignee: Upravlenie po Montazhu, Demontazhu i Remontu Gornoshakhtnogo Oborudovania "Spetsshakhtomontazh" Karagandinskogo Proizvodstvennogo Obiedinenie po Dobyche Uglya "Karagandaugol"
    Inventors: Vladimir G. Churkin, Sergei B. Negrutsky, Sergei B. Klimov, Boris F. Negrutsky
  • Patent number: 4769992
    Abstract: In a sealing mechanism for a reciprocation apparatus for use in a reciprocating engine having a reciprocation member (108), such as Stirling engine, oil or a fluid is enclosed in a fluid room constituted by a pair of flexible partioning members (112,113) such as diaphragms or multiple bellows and side walls (111a,111b) of a cylinder (111) or the like, and the fluid room is divided in two parts (114,115) by a pressure-resistive sealing member (116) fixed to inside wall of a rigid partion wall (111f) to roughly seal the fluid allowing sliding motions of the reciprocating member therein.
    Type: Grant
    Filed: December 30, 1986
    Date of Patent: September 13, 1988
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Terumaru Harada, Kenichi Inoda, Tatsuo Fujita, Kinichi Adachi
  • Patent number: 4767290
    Abstract: A self-priming pistonless lift pump has a first elongate tubular cylinder within which a second elongated tubular cylinder is loosely contained and freely slidable, the respective cylinders having inlet valves at their lower ends, and at their upper ends having fluid outlets, the outlet of the second tubular cylinder being transversely aligned with the outlet of the first cylinder when the second cylinder is in a lowermost position of travel within the first cylinder.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: August 30, 1988
    Inventor: Ellis O. Jones
  • Patent number: 4729238
    Abstract: A device for measuring the volume of a gas comprises a cylinder and a piston movably mounted in the cylinder. A first membrane sealingly connects the piston with the inner wall of the cylinder. The cylinder, the piston and the first membrane determine a measuring space in which a measuring conduit for the gas to be measured debouches. A second membrane also sealingly connects the piston with the cylinder inner wall. The first and second membranes determine an intermediate space in which an underpressure is generated during operation.
    Type: Grant
    Filed: May 19, 1986
    Date of Patent: March 8, 1988
    Assignee: Gould Electronics, B.V.
    Inventor: Anthony B. Bergmans
  • Patent number: 4691620
    Abstract: A self-flushing fluid seal assembly is provided to prevent particle intrusion into the main seal around a slurry pump shaft. The assembly includes an annular tube concentrically disposed about the pump shaft and forming a chamber. The volume of the chamber is made variable by a plunger comprising an enlarged diameter portion of the pump shaft movable relative to the chamber during the power and return stroke of the pump. Flushing liquid is delivered to the chamber by means of a feed line extending through the shaft. A check valve provided in the feed line opens to allow the inward flow of flushing fluid from the feed line to the chamber as the chamber expands. Conversely, the check valve closes and a secondary shaft seal is provided to prevent the reverse flow of flushing fluid as the chamber contracts on the return stroke.
    Type: Grant
    Filed: April 19, 1985
    Date of Patent: September 8, 1987
    Assignee: Board of Trustees of the University of Kentucky
    Inventor: David T. Kao
  • Patent number: 4612957
    Abstract: A vacuum pump and trap combination in which the trap is configured in the manner of a siphon and comprises a tube immersed in trap liquid but having an opening lying above the trap liquid level. The tube has a wall section lying below the trap liquid level and having perforations therein to admit different amounts of trap liquid in relation to the rate of discharge gas flow, thereby preventing frothing of the trap liquid.
    Type: Grant
    Filed: January 29, 1985
    Date of Patent: September 23, 1986
    Assignee: Leybold-Heraeus GmbH
    Inventors: Lutz Arndt, Paul Bachmann, Hanns-Peter Berges, Wolfgang Leier, Dieter Vorberg
  • Patent number: 4485628
    Abstract: A method and apparatus for protecting a relatively low temperature rated pressure seal from a relatively high temperature gas residing between a cylinder head and its associated piston. A low temperature rated pressure seal as for example an elastomeric seal is protected from high temperature gas in a heat engine, potentially in excess of 2,000.degree. F. (1093.degree. C.) by the use of an intermediary fluid that is trapped in a reservoir in the head of the cylinder said seal being maintained in a liquid fashion by a skirt extension from the head of the piston into the reservoir holding the described liquid, the intermediary liquid also being in contact with the elastomeric seal in the space between the piston and the cylinder.
    Type: Grant
    Filed: December 6, 1982
    Date of Patent: December 4, 1984
    Inventor: Dedger Jones
  • Patent number: 4321856
    Abstract: In a pulser for transmitting the reciprocating motion of a piston to a fluid contained in a chamber such as a solvent extraction column, at least one pulsation diaphragm having the shape of a hollow torus is joined to the piston and to a rim of the duct in leak-tight manner, means being provided for applying a pressure which compensates for the static pressure of the fluid on the piston and the pulsation diaphragm. The difference between the pressure exerted on the internal wall of the diaphragm on the fluid side and the pressure exerted on the external diaphragm wall is minimized during operation but maintained at a positive value.
    Type: Grant
    Filed: January 7, 1980
    Date of Patent: March 30, 1982
    Assignee: Commissariat a l'Energie Atomique
    Inventor: Henri Gasc
  • Patent number: 4299311
    Abstract: A disc brake comprises a rotatable brake disc, and a pad assembly disposed in opposed relation to the pressure bearing surface of the brake disc. The pressure bearing surface of the brake disc is inclined diametrically thereof, and the pad assembly is adapted to displace diametrically of the brake disc so as to engage the pressure bearing surface of the brake disc, whereby there is provided a clearance between the press surface of the pad assembly and the brake disc, which clearance is large enough to prevent the dragging phenomenon.
    Type: Grant
    Filed: November 23, 1979
    Date of Patent: November 10, 1981
    Assignee: Toyota Jidosha Kogyo Kabushiki Kaisha
    Inventors: Kenji Shirai, Minoru Takeuchi
  • Patent number: 4207807
    Abstract: A plastic air cylinder assembled by the specific combination of a plurality of metal tie rods, inside and outside nuts, a resilient and compressible member and supporting plates whereby the plastic cylinder tube is permitted to expand more than the metal tie rods.
    Type: Grant
    Filed: August 31, 1978
    Date of Patent: June 17, 1980
    Assignee: Oiles Industry Co., Ltd.
    Inventors: Yataro Takata, Yukinori Takenoshita, Kiyoshi Sasahara, Akira Shigaki, Kazuo Hirai, Kosei Maeda, Hideo Tadokuro, Hirokazu Maeda
  • Patent number: 4156584
    Abstract: A liquid cryogen pump in which liquid is maintained on both sides of the pump piston during operation. In the preferred embodiment, vapor, when present in the pump chamber, is passed from in front to behind the piston by providing a predetermined clearance between the piston and the cylinder in which it is reciprocated. The clearance is preferably large enough to pass enough liquid cryogen to maintain the desired head of liquid behind the piston. In the embodiment set forth, the pump is arranged so that it can be immersed in the liquid cryogen to be pumped with its pumping chamber and valves at or close to the bottom of the liquid cryogen supply. Heat transfer between the warm, upper end of the pump and its cold end is effectively restricted, and, preferably, the warm end is connected to the cold end of the pump by thin-walled tubular members formed of low thermal conductive materials to minimize heat transfer by conduction.
    Type: Grant
    Filed: July 19, 1976
    Date of Patent: May 29, 1979
    Assignee: Carpenter Technology Corporation
    Inventor: Thomas W. Schuck
  • Patent number: 4040773
    Abstract: Submersible electric motors, i.e., those which operate in water or brine wells, are protected against the entry of the well liquid which may contain foreign matter by being submersed in a neutral liquid, such as refined oil. Apparatus is provided which includes a float to sense the interface between the oil inside the electric motor and the well fluid outside the motor, which float and a cooperating valve and an auxiliary oil pump provides a regulated flow of oil to maintain the interface of the oil and well fluid at a fixed location. The intrusion of motor damaging well fluid into the motor is prevented.
    Type: Grant
    Filed: November 24, 1975
    Date of Patent: August 9, 1977
    Assignee: Borg-Warner Corporation
    Inventor: John J. Tuzson
  • Patent number: 4036112
    Abstract: A sealing device between a reciprocator and a stationary encircling housing comprises first and second rolling diaphragms at opposite ends of the reciprocator and exposed to higher and lower pressures, respectively, diaphragm-supporting liquid in first and second chambers in the respective diaphragms, and pumping means which, owing to the reciprocation, pumps liquid from the second chamber to the first. This means comprises an annular seal carried by the reciprocator, sliding on the housing and acting as a piston and as an inlet non-return valve, and another annular seal carried by the housing, sliding on the reciprocator and acting as an outlet non-return valve.
    Type: Grant
    Filed: June 30, 1975
    Date of Patent: July 19, 1977
    Assignee: Motoren-Werke Mannheim AG
    Inventor: Karl-Wolfgang Hubschmann
  • Patent number: 3934480
    Abstract: A connection of a rolling diaphragm to the inner one of two coaxially arranged piston and cylinder elements, the diaphragm having a thickened end accommodated in a groove in the wall of an annular face of the piston. An elastic ring clamped about the piston locks the thickened end of the seal in the groove.
    Type: Grant
    Filed: July 11, 1973
    Date of Patent: January 27, 1976
    Assignee: U.S. Philips Corporation
    Inventor: Anton Marie Nederlof