Sliding Vane Patents (Class 418/13)
  • Patent number: 4902209
    Abstract: A multiple or compound work cycle, eccentric rotor, fluid power translation device, featuring adjustable and reversible work output capability, essentially comprising: A symmetric rotor having a plurality of fixed radially extended vanes rotating closely between opposing co-axially adjustable confinement plates. An internal, eccentrically disposed annulus comprised of segmented concentric rings having co-axially protruding edges; said edges engaging circular, matching bearing grooves provided by said opposed confinement plates. The segments comprising each segmented ring being each penetrated by a rotor vane; two or more segments per vane thereby compelling co-rotation of said segments and locating said segments relative segments penetrated by adjacent rotor vanes.
    Type: Grant
    Filed: March 4, 1988
    Date of Patent: February 20, 1990
    Inventor: Howard A. Olson
  • Patent number: 4838772
    Abstract: A rotary vane vacuum pump includes a drive unit, such as an electric motor, and a pump unit, preferably constructed as a cartridge pump unit. The drive unit may take any suitable form, but the cartridge unit includes one or more pumping stages plus a pumping stage of small dimension to lower pressure and increase outgassing of the lubricant. The rotors of the rotary vane pump unit are shaftless, that is they together form an axis of rotation without a separate axial shaft and are thus simplified in construction. All of the requirements of oiling, outgassing and gas ballast are fulfilled in the additional stage.
    Type: Grant
    Filed: April 23, 1984
    Date of Patent: June 13, 1989
    Assignee: Gast Manufacturing Corporation
    Inventor: Joseph A. LeBlanc
  • Patent number: 4793138
    Abstract: An adjustable hydrostatic drive, particularly for the auxiliary units of motor vehicle internal combustion engines, has a pump/motor unit (2, 3) with the pump and motor arranged radially one within the other in a common housing (1) with an eccentric control ring (6) between them. The pump and motor are hydraulically connected together and have delivery volumes adjustable in opposite senses. The speed variation mechanism includes a shaft (14) driving the pump/motor unit (2, 3) which passes through the side plates (17) of the housing and rotates with one projecting end (20) in a bushing (22) having an eccentric, sickle-shaped shoulder (21) that engages in a through bore (23) in a front face (30) of the control ring (6) and an outer bushing (24) that coaxially surrounds the shaft end bushing and includes a nose (25) which projects into a radial groove (26) in the control ring (6).
    Type: Grant
    Filed: September 8, 1987
    Date of Patent: December 27, 1988
    Assignee: Pierburg GmbH
    Inventor: Hans Baumgartner
  • Patent number: 4770609
    Abstract: A two-stage vacuum pump apparatus has a first stage of vacuum pump constituted by a screw-type vacuum pump and a second stage vacuum pump constituted by an oil-sealed rotary vacuum pump operative to maintain the back pressure of the first stage vacuum pump at a level ranging from 1 to 100 Torr., whereby a high level of vacuum can be attained in a system to be evacuated without any risk of contamination of the evacuated system by oil. Also disclosed is a method of operating the two-stage vacuum pump apparatus.
    Type: Grant
    Filed: March 16, 1987
    Date of Patent: September 13, 1988
    Assignee: Hitachi, Ltd.
    Inventors: Riichi Uchida, Seiji Tsuru, Kazuaki Shiinoki, Kotaro Naya
  • Patent number: 4716726
    Abstract: An adjustable rotary vane pump for changing the direction and rate of fluid flow through the pump. The pump comprises a first pump housing having a generally cylindrical chamber therein along a central axis of the housing. A second housing is provided having a second chamber therein coaxially oriented with the first housing. An insert member is provided in the second housing having an aperture therein of a given eccentricity. The insert member is slidably adjustable for rotational movement within the second housing for providing varying cross-sectional dimensions for the fluid flow through the pump. A rotor is disposed in the housing coaxial with the first and second housing. A plurality of vane members are provided on the rotor which respectively engage the walls of the first chamber and the insert member within the pump.
    Type: Grant
    Filed: March 12, 1986
    Date of Patent: January 5, 1988
    Inventor: David J. Nowaczyk
  • Patent number: 4697994
    Abstract: A multistage discharge type rotary vacuum pump comprises a rotor rotably mounted within a cylinder chamber and dividing the cylinder chamber into first stage and second stage working chambers. A plurality of radially extending vanes are slidably mounted in the rotor in angularly spaced relation, and the vanes undergo radial sliding movement during rotation of the rotor such that the vane tips maintain sliding contact with the cylinder chamber. Each working chamber has an inlet port at the upstream side thereof for admitting exhaust gas evacuated from a confined space during use of the pump, and an outlet port at the downstream side thereof for discharging the exhaust gas which has been compressed in the working chamber in response to rotation of the rotor. The outlet port of the first stage working chamber communicates through a discharge valve with a storage chamber, and the storage chamber communicates through a pressure-responsive discharge valve with the inlet port of the second stage working chamber.
    Type: Grant
    Filed: December 20, 1984
    Date of Patent: October 6, 1987
    Assignee: Seiko Seiki Kabushiki Kaisha
    Inventors: Tadao Ishizawa, Hirofumi Kotaka, Masami Kakinuma
  • Patent number: 4627802
    Abstract: A vane compressor comprising a rotor eccentrically arranged in a cylindrical housing and vanes, which define a space between the periphery of the rotor and the inner surface of the housing. The volume of the space varies during the rotation of the rotor due to the eccentricity of the rotor. The rotor (14) comprises inlet valves (19, 23) arranged between the inlet (12) of the compressor and the space (46) in order to open when the pressure in the space (46) is below the pressure at the inlet (12) in order to suck in air inside the space (46) during the intake stroke of the rotor. Moreover, the rotor comprises outlet valves (20, 24) arranged between the space and the outlet (48) of the compressor and adapted to open when the pressure in the space (46) exceeds the counter-pressure at the outlet (48) during the compression stroke.
    Type: Grant
    Filed: December 11, 1984
    Date of Patent: December 9, 1986
    Inventors: Rudolph Draaisma, Werner Reichmann
  • Patent number: 4588358
    Abstract: A rotary vane evacuating pump having two series connected pumping stages is disclosed. Each pumping stage is provided as an exchangeable unit and has a housing which is detachably connected to one face of an interface flange. The housings of the pumping stages are contained in a chamber defined between the interface flange and an outer shell which is detachably mounted thereto. The chamber is filled with water surrounding and contacting the two housings. Each pumping stage is readily dismantled for the purpose of service or replacement.
    Type: Grant
    Filed: July 2, 1984
    Date of Patent: May 13, 1986
    Assignee: Werner Rietschle Maschinen-und Apparatebau GmbH
    Inventor: Werner Rietschle
  • Patent number: 4540353
    Abstract: The invention pertains to a two-stage vacuum pump for servicing refrigeration systems wherein a pair of electrically driven rotors support movable vanes engaging the cylindrical circumference of pumping chambers in which the rotors are mounted. The improvements pertain to the sealing of the rotor shaft, the introduction of metered oil into the pump, and the keying of a rotor to its driveshaft wherein improved assembly and operational characteristics are achieved.
    Type: Grant
    Filed: February 8, 1984
    Date of Patent: September 10, 1985
    Assignee: Robinair Division
    Inventor: Gary P. Murray
  • Patent number: 4523897
    Abstract: The invention pertains to a two stage vacuum pump particularly suitable for servicing refrigeration systems wherein a pair of electrically driven rotors support outwardly movable vanes engaging the cylindrical circumference of pumping chambers in which the rotors are mounted. The efficient relationship of components produces a high capacity pump in a concise configuration, lateral sides of the rotors are recessed to produce rapid seating of the vanes, reduce hydraulic end loading of the second stage rotor and minimize friction. The vanes are offset from the associated rotor axis to allow greater displacement for a given chamber bore and rotor size, and advantageous frictional forces are produced to augment sealing between the vane tips and chamber surface. Further, the vane tips are shaped to optimize compression and reduce gas re-expansion, and the rotors of the two stages are rotationally phased to improve capacity and pumping characteristics.
    Type: Grant
    Filed: July 16, 1984
    Date of Patent: June 18, 1985
    Assignee: Robinair Division
    Inventors: Ralph C. Lower, Gary P. Murray
  • Patent number: 4508494
    Abstract: An arrangement for transmitting torque between the two rotors of a two stage rotary vane pump, consists of a coupling element, which forms between engagements on opposing faces of the two rotors, a connection which permits two degrees of freedom between the two rotors in the plane perpendicular to the rotor axis.
    Type: Grant
    Filed: September 28, 1982
    Date of Patent: April 2, 1985
    Assignee: Arthur Pfeiffer Vakuumtechnik Wetzlar GmbH
    Inventors: Erich Bachmann, Ludwig Fabel, Roland Fischer, Werner Peter, Bernd Scheiter, Werner Wenzel
  • Patent number: 4354807
    Abstract: A compressor-expander having a vaned rotor in which the vanes rotate about an axis which is canted with respect to the rotor axis. The housing of the device has a disc-shaped main cavity having adjacent hub recesses which are concentrically spherical. The cavity is in the form of a doubly truncated sphere canted with respect to the shaft axis. The rotor has a central spherical portion for mating with the recesses and includes an integral Saturn-like ring extending to the outer wall of the cavity to divide the cavity into first and second complementary sides of annular wedge shape. The vanes occupy radially extending slots in the rotor and serve to separate each side into successive chambers which vary cyclically in volume as the shaft rotates without requiring the vanes to bodily reciprocate either radially or axially. Each side is provided with inlet and outlet ports.
    Type: Grant
    Filed: May 2, 1980
    Date of Patent: October 19, 1982
    Assignee: The Rovac Corporation
    Inventors: Wayne C. Shank, Thomas C. Edwards
  • Patent number: 4299546
    Abstract: A rotary vane gas cycle apparatus having radial slots in the vanes and with cam bearings supported in the slots. A camtrack member is supported by the rotary vane gas cycle apparatus housing and fits into the slots in the vanes and rotor to control the movement of the vanes during rotation of the rotor assembly within the chamber in the housing. Springs are provided in the rotor slots to support the weight of the vanes when the rotor assembly is not rotating.
    Type: Grant
    Filed: December 3, 1979
    Date of Patent: November 10, 1981
    Inventor: Robert L. Stout
  • Patent number: 4283167
    Abstract: An oil pool in a rotary vane, oil sealed mechanical vacuum pump casing is cooled by air drawn by a relatively low pressure and low speed laminar flow fan mounted on a motor shaft for the pump and positioned in a shroud between end plates for the motor and casing. The air pumped by the fan flows axially relative to the shaft through a horizotally extending slot at the bottom of the shroud and vertically extending slots on the sides of the shroud. The pumped air flows against vertically and horizontally extending fins respectively on the pump casing bottom and sides. The vertically extending fins at the bottom of the casing have bases slightly above the horizontal slot at the bottom of the housing so air flowing through that slot flows against the bases of the fins at a shallow angle. A vertical surface of the housing remote from the fan and the shroud has vertically extending fins that are aligned with the vertically extending fins on the bottom of the casing.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: August 11, 1981
    Assignee: Varian Associates, Inc.
    Inventors: Benjamin Bassan, Michael A. Grandinetti
  • Patent number: 4276005
    Abstract: A mechanical rotary vane vacuum pump has high and low vacuum stages for a pumped gas. Each stage includes a rotor for vanes cyclically driven about a common axis that is eccentric to a cylinder of a stator; the stator of each stage includes an inlet and outlet for the pumped gas. An oil seal between inlets and outlets for each stage is in a narrow gap between the stator and rotor. An interstage structure includes a flow path between the stages for the pumped gases and a shaft drivingly connected the rotors of the stages. An oil flow path comprises a first passage through the interstage structure leading radially to the shaft. The shaft includes diametrically opposed oil metering flats or cavities longitudinally aligned with an outlet of the first passage. A second passage through the interstage structure is longitudinally aligned with the cavities and leads tangentially from the peripheries of the shaft and a bore for the shaft.
    Type: Grant
    Filed: April 26, 1979
    Date of Patent: June 30, 1981
    Assignee: Varian Associates, Inc.
    Inventor: Benjamin Bassan
  • Patent number: 4209286
    Abstract: A reverse Brayton cycle rotary vane cooling system having a compressor and an expander driven by a common shaft. The vanes which slide in slots in a rotor are actuated by cams and cam rollers. The vanes are constructed with high modulus of electricity fibers in an epoxy resin binder. The outer wear surface of the vanes contain a material with self lubricating properties.
    Type: Grant
    Filed: September 27, 1978
    Date of Patent: June 24, 1980
    Inventor: Kenneth P. Schwartz
  • Patent number: 4204815
    Abstract: A rotary vane vacuum pump includes a drive unit, such as an electric motor, and a pump unit, preferably constructed as a cartridge pump unit. The drive unit may take any suitable form, but the cartridge unit includes one or more pumping stages plus a pumping stage of small dimension to lower pressure and increase outgassing of the lubricant. The rotors of the rotary vane pump unit are shaftless, that is they together form an axis of rotation without a separate axial shaft and are thus simplified in construction. All of the requirements of oiling, outgassing and gas ballast are fulfilled in the additional stage.
    Type: Grant
    Filed: December 6, 1977
    Date of Patent: May 27, 1980
    Assignee: Gast Manufacturing Corporation
    Inventor: Joseph A. Le Blanc
  • Patent number: 4088426
    Abstract: A compressor-expander for use in air conditioning including a chamber of generally elliptical cross section having a compressor side and an expander side each with inlet and outlet ports. Rotatable in the chamber is a vaned rotor defining enclosed compartments in which the air is positively compressed accompanied by an increase in temperature in the compressor side and is positively expanded with a decrease in temperature in the expander side, the elliptical eccentricity of the compressor side being less than 0.62 and the eccentricity on the expander side being less than the eccentricity of the compressor side in a ratio lying between 0.68 and 0.95. Pressure in the compartment at the point of discharge is substantially at atmospheric level, and the expander outlet port is so located that when a compartment on the expander side is centered on the major axis, the leading vane is at the threshold of discharge.
    Type: Grant
    Filed: May 17, 1976
    Date of Patent: May 9, 1978
    Assignee: The Rovac Corporation
    Inventor: Thomas C. Edwards
  • Patent number: 4043704
    Abstract: In a double-acting rotary compressor having two compression spaces each constituted by at least one variable-volume compression chamber which is put into communication first with the suction enclosure and then with the discharge enclosure, the power consumption at low delivery is reduced by causing the two compression spaces to discharge in parallel into a common duct in the vicinity of maximum delivery and connecting the spaces in series for deliveries below a predetermined value by joining the outlet of the first space to the second space at a point at which the compression chamber is already isolated from the suction enclosure.
    Type: Grant
    Filed: July 15, 1975
    Date of Patent: August 23, 1977
    Assignee: Uniscrew Limited
    Inventor: Bernard Zimmern
  • Patent number: 4025242
    Abstract: A system is shown for the positive, metered lubrication of the shaft and rotor surfaces in a mechanical vacuum pump. The pump has an end plate which receives the shaft in a cylindrical opening and a lubricant conduit is provided in the end plate communicating with that opening. At a location of the opening's cylindrical surface circumferentially spaced from the lubricant conduit, a recess is provided in that cylindrical surface, the recess extending to the end of that surface adjacent the conventional pump rotor secured to the shaft for rotation therewith. One or more recesses are provided in the shaft itself and each is axially alinged with both the lubricant conduit and a portion of the recess in the cylindrical surface. Thus, upon rotation of the shaft, the recess in the shaft itself receives lubricant from the lubricant conduit and deposits the lubricant in the first-mentioned recess.
    Type: Grant
    Filed: October 20, 1975
    Date of Patent: May 24, 1977
    Assignee: GCA Corporation
    Inventor: David B. Webb
  • Patent number: 4017285
    Abstract: An air conditioning system for a living space capable of operating as a heat pump or refrigerator employing a unitary compressor and expander having a common rotor with vanes defining enclosed compartments for positive compression of air in the compressor and positive expansion of air in the expander. A regenerative heat exchanger having thermally coupled air passages is employed in the system together with a non-regenerative primary heat exchanger which is located in the warm space. Air from the cool space is heated in the first passage of the regenerative heat exchanger, and moisture is injected, following which the air passes into the compressor inlet port. From the compressor outlet port wet air flows at high temperature and pressure to the primary heat exchanger located in the warm space where some of its heat is given up. Next the air flows through the second passage in the regenerative heat exchanger where its temperature is further lowered prior to being fed to the expander inlet port.
    Type: Grant
    Filed: October 30, 1975
    Date of Patent: April 12, 1977
    Assignee: The Rovac Corporation
    Inventor: Thomas C. Edwards
  • Patent number: 4015441
    Abstract: Disclosed is a first stator defining an internal cavity and a second stator within the cavity of the first stator. A cylindrical rotor is disposed within the cavity. The rotor defines a first chamber within the cavity between it and the inner walls of the first stator and a second chamber within the cavity between the rotor and the outer walls of the second stator. The rotor carries vanes radially slidable in slots spaced circumferentially about the rotor. The inner and outer walls of the first and second stators respectively are spaced one from the other such that the linear distance therebetween along any extended radius of the rotor is substantially equal to the radial length of vanes whereby the outer and inner edges of the vanes are in continuous engagement along the inner and outer walls of the respective first and second stators upon rotation of the rotor. An inlet and an outlet are provided each of the first and second chambers.
    Type: Grant
    Filed: March 10, 1976
    Date of Patent: April 5, 1977
    Inventor: Sylvia J. Robinet
  • 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
  • Patent number: 3951111
    Abstract: This engine or energy converter has a casing comprising coaxial spaced sections each having a cavity bounded by opposed parallel flat inner side surfaces merging with semi-cylindrical top and bottom inner surfaces and a rotor coaxial with said sections, having rotor portions in said sections. Said rotor portions carry outwardly spring pressed opposed aligned radial pistons. The pistons of one rotor portion are disposed at right angles to the pistons of the other rotor portion. In each section there is formed a top chamber on one side of the rotor portion for said sections and a bottom chamber on opposite side of the rotor portion for said section.
    Type: Grant
    Filed: July 10, 1974
    Date of Patent: April 20, 1976
    Inventor: William M. Lester
  • Patent number: 3948225
    Abstract: This engine has coextensive rotors on parallel axes in coextensive cavities having parallel axes. In each cavity there is an inlet and compression chamber on one side of the rotor in said cavity and an explosion and exhaust chamber on the other side of said rotor in said cavity. The engine also has valve means to allow compressed combustion gas from the inlet and compression chamber of one cavity to pass to the explosion and exhaust chamber of the other cavity. Each rotor carries diametrically disposed, outwardly spring pressed radial pistons to sweep through said chambers in wiping relation to the internal surfaces of said cavities. The rotors are connected for rotation in the same direction at equal speeds.
    Type: Grant
    Filed: November 27, 1974
    Date of Patent: April 6, 1976
    Inventor: William M. Lester