Patents Examined by Timothy Thorpe
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Patent number: 5803718Abstract: An improved oil supplying apparatus for a hermetic type compressor capable of preventing a burr formation due to scratches caused between an outer sharp edge portion of a propeller and the inner surface of a casing when the propeller is inserted into the casing by providing protrusions at both ends of upper and intermediate support blades of the propeller, which includes a crank shaft having an outer guide groove formed on an outer surface thereof and an inner guide groove formed on an inner portion thereof; a casing connected to the lower portion of a lower portion of the inner guide groove of the crank shaft; and an oil supplying unit having an oil supplying unit, a supporting unit, and a scratch prevention unit, the oil supplying unit, the supporting unit, and the scratch prevention unit being disposed within the casing.Type: GrantFiled: January 5, 1996Date of Patent: September 8, 1998Assignee: LG Electronics Inc.Inventor: Jin Hyun Woo
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Patent number: 5803716Abstract: A scroll machine has an intermediate pressure cavity which is operable to open and close a leakage path between the discharge zone and the suction zone of the scroll machine. The leakage path is closed when intermediate pressurized fluid is supplied to the cavity and the leakage path is open when the cavity is open to the suction zone of the compressor. A valve (102) which can be mechanical or electrical is used to open and close a passageway extending between the cavity and the suction zone of the machine. A high pressure relief valve is incorporated into the design of the compressor to prevent slugging. The high pressure relief valve will release the intermediate pressurized fluid to suction and/or discharge when the pressure within the intermediate pressure cavity exceeds a predetermined value.Type: GrantFiled: April 5, 1996Date of Patent: September 8, 1998Assignee: Copeland CorporationInventors: Frank S. Wallis, Jean-Luc Caillat, Francis M. Simpson, Gary J. Anderson, Donald W. Rode, Norman G. Beck
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Patent number: 5803717Abstract: A refrigerant compressor arrangement is disclosed, having a compressor which is arranged in a housing and which has a suction connection, the housing being provided with a suction connector which is joined to the suction connection by way of a suction channel. In such an arrangement, it is desirable to increase the opportunity of the compressor to move, that is, to reduce noise, without at the same time having to accept a deterioration in efficiency. To that end, at its housing end the suction channel is in the form of a telescope tube which is capable of being telescoped into the suction connector.Type: GrantFiled: January 3, 1997Date of Patent: September 8, 1998Assignee: Danfoss Compressors GmbHInventors: Frank Holm Iversen, Svend Erik Outzen, Hans Christian Andersen
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Patent number: 5803711Abstract: A solenoid valve for a water purification system. The solenoid valve contains a fluid valve which can move between an opened position and a closed position, and a coil which moves the valve to the open position when a first voltage is supplied to the coil and maintains the valve in the open position as a second voltage is supplied to the coil. The coil is coupled to a control circuit which initially supplies the first voltage to the coil when the valve is to be opened, and then reduces the first voltage to the second voltage after the valve is in the open position.Type: GrantFiled: February 5, 1996Date of Patent: September 8, 1998Inventor: Ivar Schoenmeyr
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Patent number: 5800134Abstract: A tandem, swash plate-type hydraulic pump in which a drive force transmission system for extending one or more hydraulic pumps and a structure relating to the system can be made simple and light, and one or more hydraulic pumps even when extended can be compactly arranged without increasing the axial length of the pump unit. A drive force take-out mechanism for taking outward part of a driving force out of a spline sleeve member of a spline coupling which is an intermediate coupling of a tandem, swash plate-type hydraulic pump. A first gear is connected with a spline sleeve member and a gear box. The gear box is composed of an intermediate gear, a driven gear, a spline sleeve member, and a gear case for rotatably housing these components. The gear box is removably fixed to an intermediate block and provided on both surfaces of the gear case are pump mounting portions for mounting hydraulic pumps which may be added as appropriate.Type: GrantFiled: November 25, 1996Date of Patent: September 1, 1998Assignee: Kawasaki Jukogyo Kabushiki KaishaInventors: Susumu Hasegawa, Shoji Nakagaki, Tokihiko Umeda
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Patent number: 5799690Abstract: A volumetric pump valve for pumps for controlling fluid flow, such as in pumps for administering intravenous fluids, comprises a housing formed with first and second cavities, an inlet conduit leading through the housing into the first cavity, an outlet conduit leading through the housing from the second cavity and a passage between the first and second cavities to allow fluid to flow between them. A resilient sealing means is disposed adjacent the passage for selectively sealing the passage to prevent fluid flow between the cavities during low pressure events in the first cavity such that the fluid flows in the direction of the second cavity. A ball disposed on the side of the resilient sealing means opposite the passage is moveable toward the passage to cause the resilient sealing means to selectively seal the passage.Type: GrantFiled: August 5, 1996Date of Patent: September 1, 1998Assignee: Sarcos GroupInventors: Stephen C. Jacobsen, Clark C. Davis
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Patent number: 5800139Abstract: An electromagnetic pump has a solenoid reciprocating a piston that abuts the ball of a first, one-way ball valve coaxially aligned with the piston axis. In the abutting position the piston closes the valve and provides a pump chamber of very small volume. An second, one-way outlet valve is located orthogonal to the first valve to provide a compact structure and further minimize the volume of the pump chamber. A plurality of these inlet valves can be arranged so the pistons are parallel and activated by a single, solenoid activated piston, with the outlet valves being radially orientated to provide a compact structure that simultaneously provides precise fluid amounts to a plurality of locations, such as multiple pistons of a two cycle engine.Type: GrantFiled: September 12, 1996Date of Patent: September 1, 1998Assignee: Yamada Hatsudoki Kabushiki KaishaInventor: Seiichiro Yamada
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Patent number: 5800133Abstract: A compressor has a compression chamber and a discharge region. The discharge region receives the compressed gas discharged from the compression chamber. A relief valve is mounted to inside of the wall in the discharge region. The relief valve connects the discharge region with the exterior of the compressor so as to discharge the excessively raised pressure in the discharge region.Type: GrantFiled: October 11, 1996Date of Patent: September 1, 1998Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Hayato Ikeda, Hitoshi Inukai, Kazuhito Kawasumi, Hideo Mori, Koichi Ito, Naoya Yokomachi
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Patent number: 5800135Abstract: A vane cell (sliding vane) pump having a flow control valve (13) with a control piston (17). The control piston (17) operates as a pressure regulator, wherein a differential pressure that occurs with increasing pump speed is used as the measuring valve for the directly diverted conveyed flow. The directly diverted conveyed flow is introduced via a spray channel (25) into a distributing section (20), which is connected via curved suction arms (21,22) with suction zones (23,24). The distributing section (20) and the suction arms (21,22) nestle against a driveshaft such that the driveshaft acts as a flow divider. Additionally, the spray channel (25) terminates at the center of the distributing section (20) so that the sprayed off oil and the suction oil conveyed by the suction channel (18) is evenly divided between both suction zones (23,24). Since the hydraulic oil lubricates the driveshaft (12), no cavitation or abrasion can occur in this area.Type: GrantFiled: April 17, 1997Date of Patent: September 1, 1998Assignee: ZF Friedrichshafen AG.Inventor: Johann Merz
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Patent number: 5797731Abstract: A group of full-circumferential-flow pumps has a group of motors each comprising a main shaft, a rotor mounted on the main shaft, a stator disposed around the rotor, a cylindrical outer motor frame fitted over the stator, and an outer cylinder disposed around the cylindrical outer motor frame with an annular space defined therebetween, a group of pump parts oriented in opposite directions to meet different directions in which the main shafts of the motors rotate, and a group of frequency converters for energizing the motors to rotate at high speeds.Type: GrantFiled: February 21, 1996Date of Patent: August 25, 1998Assignee: Ebara CorporationInventors: Makoto Kobayashi, Masakazu Yamamoto, Yoshio Miyake, Koji Isemoto, Keita Uwai, Yoshiaki Miyazaki
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Patent number: 5797733Abstract: An electromagnetic pump comprising a housing having fluid receiving and pumping chambers in communication with an inlet and outlet, respectively, an electromagnet carried by the housing external to the fluid chambers thereof, and an armature movable in the housing having a pole portion magnetically attracted by the electromagnet and a piston portion to force fluid out of the chambers and through the pump outlet. A path provides controlled bypass for bubbles in the fluid around the armature piston portion between the fluid pumping chamber and the fluid receiving chamber only during the return stroke of the armature.Fluid inertia is reduced by an outlet orifice in the path of fluid flow from the pump outlet and by a bypass orifice for fluid flow in the bypass path, the orifices being provided either individually or in combination depending upon the fluid flow characteristics of the system including the pump.Type: GrantFiled: February 24, 1997Date of Patent: August 25, 1998Assignee: Wilson Greatbatch Ltd.Inventors: Theodore J. Falk, W. Richard Brown, Lawrence E. Morris, Norbert W. Frenz, Jr., Douglas K. Gillies, Raymond S. Konopa
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Patent number: 5797732Abstract: An oil pump effects a pumping action to deliver oil from an inlet port to a first outlet port and also to a second outlet port. An oil supply passage is connected to the second outlet port. A regulator value has a bore, a spool disposed in the bore, a pressure chamber, and a pressure admission port connected to the oil supply passage and communicating with the pressure chamber. A branch passage connected to the oil supply passage opens to the bore. The regulator valve also has relief port connected to the inlet port and opening to the bore, and a transfer port connected to the first outlet port. The spool disposed in the bore is moveable responsive to pressure within the pressure chamber between a first position in which the transfer port is connected to the branch passage and a second position in which the transfer port is connected to the relief port.Type: GrantFiled: February 7, 1997Date of Patent: August 25, 1998Assignee: Unisia Jecs CorporationInventors: Yasushi Watanabe, Hideaki Ohnishi
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Patent number: 5797730Abstract: A compressor has a refrigerant gas passage selectively connected to and disconnected from a refrigerant circuit apart from the compressor. A swash plate is supported on a drive shaft for integral rotation with inclining motion with respect to the drive shaft to drive the pistons. The swash plate is moveable between a maximum inclined angle and a minimum inclining angle. A disconnecting member disconnects the refrigerant circuit from the refrigerant gas passage when the swash plate is at the minimum inclined angle.Type: GrantFiled: August 29, 1996Date of Patent: August 25, 1998Assignee: Kabushiki Kaisha Toyoda Jidoshokki SeisakushoInventors: Masahiro Kawaguchi, Masanori Sonobe, Tomohiko Yokono, Ken Suitou
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Patent number: 5795140Abstract: A reciprocating compressor includes a housing in which lubricating oil is stored, and an electric motor for driving a vertical crankshaft connected to a piston for reciprocating the piston. The crankshaft includes an outer peripheral contact surface rotatably mounted in the bearing. An oil passage is formed in the crankshaft, the oil passage having an oil inlet submerged in the oil, and an oil outlet communicating with the contact surface for conducting oil to the contact surface in response to rotation of the crankshaft. The contact surface includes spiral races formed therein in circumferentially spaced relationship to the oil outlet for reducing the size of the contact surface and hence reducing the amount of friction produced between the contact surface and the bearing.Type: GrantFiled: October 7, 1996Date of Patent: August 18, 1998Assignee: Samsung Electronics Co., Ltd.Inventor: Sun Ik Jin
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Patent number: 5794435Abstract: A hybrid heater vaporization system (280, 380) including hybrid heaters (250, 350) can be used to vaporize liquid oxygen as it enters a motor (200, 300) to improve the combustion characteristics of a hybrid rocket (11). The motor (200, 300) preferably includes hybrid fuel both in a substantially cylindrical portion (216, 316) in the substantially cylindrical portion of the motor and a substantially multi-toroidal shaped portion (217, 316) in the forward end of the motor (200, 300). The vaporization system (280, 380) of the present invention finally makes hybrid rockets (11) practical for aerospace applications.Type: GrantFiled: February 7, 1996Date of Patent: August 18, 1998Assignee: Lockhhed Martin CorporationInventor: H. Stephen Jones
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Patent number: 5794434Abstract: A thrust reverser system including a reverse thrust airflow duct (44) extending through an outer structure (46) of an aircraft engine aft nozzle (32) is disclosed. The reverse thrust duct (44) connects a nozzle exhaust duct (34) with the surrounding atmosphere (46). The duct (44) includes an inlet (72) and an outlet (70). A plurality of slats (50) are located within the reverse thrust duct to direct nozzle exhaust (38) from the nozzle exhaust duct (34) in an outward and/or forward direction. One or more outer doors (54) are formed near the outer structure exterior surface (90) for closing off the reverse thrust duct outlet (70) to the atmosphere. One or more inner doors (56) are provided for closing off the duct inlet (72) at the exhaust duct (34). An actuation system moves the inner and outer doors (56), (54) between open and closed positions. In the open position, the inner and outer doors (56), (54) are moved away from the duct (44) to open the airflow duct inlet and outlet.Type: GrantFiled: October 9, 1996Date of Patent: August 18, 1998Assignee: The Boeing CompanyInventor: Imre A. Szupkay
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Patent number: 5795138Abstract: A compressor includes impeller rotors, a rotatable shaft upon which the impeller rotors are mounted, and tilting pad journal bearings having a ceramics bearing surface. The rotatable shaft is journalled by the tilting pad journal bearings which is arranged to be self generating and air or gas lubricated. The tilting pad self generating bearings reduce frictional losses and the ceramics bearing surfaces prevent problems commonly caused by high speed and temperature generated at bearings.Type: GrantFiled: March 7, 1995Date of Patent: August 18, 1998Inventor: Richard Gozdawa
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Patent number: 5795142Abstract: The invention relates to a vane cell pump with a control plate (8) and an end plate (6), between which a pump package (1) is located. The control plate (8) and the end plate (6) have suction and compression chambers (12, 12A and 13, 13A, respectively) opposite one another. While the control plate (8) controls the inflow and outflow of oil, the end plate (6) has a function of guiding the oil. According to the invention, the control edges (15, 15A, 16, 16A, 17, 17A, 18, 18A) on the end plate (6) are recessed relative to the control edges of the control plate (8). This provision enables more-economical manufacture.Type: GrantFiled: January 13, 1997Date of Patent: August 18, 1998Assignee: ZF Friedrichshafen AG.Inventors: Johann Merz, Masao Yasuda
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Patent number: 5791884Abstract: A scroll compressor has a stationary scroll and a swivel scroll engaged with each other in a hermetic housing. A sealed terminal is provided to send signals outside of the housing from a sensor that is provided within the housing. The sealed terminal is inserted into a fitting hole that passes through the outer wall of the housing. A push nut having a plurality of nails is pressed into the fitting hole to hold the sealed terminal within the fitting hole. The push nut has a plurality of nails having an outer diameter slightly larger than the inner diameter of the fitting hole.Type: GrantFiled: August 18, 1995Date of Patent: August 11, 1998Assignee: Mitsubishi Jukogyo Kabushiki KaishaInventors: Takayuki Iio, Mikihiko Ishii, Shigeki Miura, Ryuhei Tanigaki
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Patent number: 5791136Abstract: To provide a combined-cycle power generation plant heat exchanged effectively in an exhaust heat, the recovery boiler is increased by suppressing on reducing the swirl present in the exhaust gas of a gas turbine. That is, a plurality of stationary blades 10 are arranged on the surface of a rear inner barrel in the circumferential direction of the rear inner barrel to partition an annular channel formed between a casing and the rear inner barrel. Thereby, it is possible to uniform the flow of exhaust gas with a low pressure drop.Type: GrantFiled: July 28, 1995Date of Patent: August 11, 1998Assignee: Hitachi, Ltd.Inventors: Motoaki Utamura, Seiichi Kirikami