Patents Examined by Eugene L. Szczecina, Jr.
  • Patent number: 4979878
    Abstract: An asymmetrical or relieved piston is provided in a fluid motor or a pump. The piston is rigidly connected to one end of the connecting rod, the opposite end of which is pivotally connected to a rotating crankshaft. The piston has a relieved upper and lower section each of which has a partial spherical surface. When the piston is tilted in one direction through half of a rotation of the crankshaft, a seal is formed between the partial spherical surface and the wall of a cylinder. During the other half of the rotation, the relieved piston is tilted in the opposite direction, the seal is broken, and fluid bypasses the piston from the upper half of the cylinder volume to the lower half or vice versa. A floating poppet valve is utilized in the engine, and a floating check valve is utilized in the pump of the described single piston embodiments.
    Type: Grant
    Filed: March 3, 1989
    Date of Patent: December 25, 1990
    Assignee: James L. Short
    Inventors: James L. Short, Robert L. Short
  • Patent number: 4978282
    Abstract: This invention discloses an electrical fuel pump for a small motorcycle engine including an intake socket for introducing the fuel into the pump, a gerotor pump for compressing the incoming fuel, a discharge socket for discharging the compressed fuel from the pump, a DC motor for driving the gerotor pump, a coupling for transmitting the rotation power of the motor to the gerotor pump, and a casing for receiving the intake socket, the discharge socket, the gerotor pump, the coupling and the DC motor therein. The gerotor pump has a pair of engaged rotors, including a toothed inner rotor and a toothed outer rotor disposed eccentrically relative to each other, with a plurality of outer and inner teeth being, respectively, formed on the outer periphery of the inner rotor and on the inner periphery of the outer rotor so that the outer rotor may be driven by the inner rotor through engagement of the inner and outer teeth.
    Type: Grant
    Filed: January 23, 1990
    Date of Patent: December 18, 1990
    Assignee: Industrial Technology Research Institute
    Inventors: Shih-Lien Fu, Wu-Tsung Dent
  • Patent number: 4978281
    Abstract: An air blower for a therapy pool has its motor blower assembly resiliently mounted to the housing for decreased transmission of noise and vibration to the case and attached plumbing. A resilient, elastomeric annulus, reinforced at its inner edge, connects the motor to the blower housing by means of an improved connection between the flexible annulus and the housing. The outer peripheral edge of the flexible annulus is formed with a pair of circumferential locking ribs and a number of circumferentially spaced holes, and this edge is permanently secured to the housing by being molded to and integrally embedded within a housing mounting ring that forms part of the blower housing.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: December 18, 1990
    Inventor: William W. Conger, IV
  • Patent number: 4976593
    Abstract: A pulsatile flow delivery apparatus includes a horse shoe shaped raceway, a tube, a milking mechanism, an occlusive clamp and a control device. The tube is disposed along the raceway. The milking mechanism has a pivot shaft, a rotating arm fixedly secured to the shaft and one milking roller rotatably mounted on one end of the rotating arm. The occlusive clamp has a stationary component, a mobile component disposed in opposed relation to the stationary component, and an actuator connected to the mobile component for moving the mobile component toward and away from the stationary component to clamp and release the downstream portion of the tube. The timing of opening and closing of the occlusive clamp is controlled by the control device to produce a pulsatile flow.
    Type: Grant
    Filed: April 7, 1989
    Date of Patent: December 11, 1990
    Assignee: Meddiss, Incorporated
    Inventor: Alfonso T. Miyamoto
  • Patent number: 4973227
    Abstract: A method of producing a vacuum in a volume of a hollow body which has at least one outlet opening for the gaseous atmosphere present therein, the method includes the following steps: introducing at least about 3 g/dm.sup.3 of evacuation volume of a metal hydride into the hollow body so as to take up less than about 5% of the volume 3. The metal hydride comprises a hydride forming alloy of the formulaTi(V.sub.1-a-b Fe.sub.a Al.sub.b).sub.xy Mn.sub.z,wherein1<x.ltoreq.20<y.ltoreq.0.2x+y.ltoreq.20<a.ltoreq.0.40<b.ltoreq.0.2a+b.ltoreq.0.5(1-a-b) x.gtoreq.10<z.ltoreq.2-x-y.The metal hydride is heated to a temperature so that a substantial amount of the gaseous hydrogen is released from the hydride, the heating step is performed so that heating of the hollow body will not exceed a temperature of about 500.degree. C.
    Type: Grant
    Filed: June 16, 1989
    Date of Patent: November 27, 1990
    Assignee: HWT Gesellschaft fur Hydrid-und Wasserstofftechnik m.b.H.
    Inventors: Otto Bernauer, Clemens Halene, Manfred Keller
  • Patent number: 4971523
    Abstract: A diaphragm assembly includes a pair of superposed flexible diaphragms adhesively secured to an annular spacer ring. The space between the diaphragms and the interior of the rings is filled preferably with de-ionized water. The resistivity of the water is monitored to detect conductivity changes upon leakage or diaphragm rupture when pumped materials or pump lubricant mix with the water. Diaphragm assembly and rupture detection methods are disclosed.
    Type: Grant
    Filed: September 13, 1988
    Date of Patent: November 20, 1990
    Assignee: Nordson Corporation
    Inventors: Robert L. Wacker, James Kennon, Kevin C. Becker, Harry J. Lader, William R. Rehman
  • Patent number: 4969808
    Abstract: The present invention relates to an elastic tubing pump and more particularly to an elastic tubing pump. The pump has an elastic tube communicating with a liquid supply source, a pressing means for pressing at least two points of a section of the elastic tube to seal the liquid therein, a driving means for pushing the pressing means in one direction of the elastic tube, a locking means for firmly holding the elastic tube from being moved by the pressing means, a shifting means for unlocking the locking means according to the driving operations of the driving means and for advancing the elastic tube by the length of its compressed section. The driving means can accelerate to compensate for the possible decrease in the liquid's flow through the tube during a time of shifting the elastic tube by one section's length.
    Type: Grant
    Filed: November 16, 1989
    Date of Patent: November 13, 1990
    Assignee: Oval Engineering Co., Ltd.
    Inventor: Akira Tsukada
  • Patent number: 4969804
    Abstract: A compressor assembly including a compressor mechanism mounted within a hermetically sealed housing. The compressor mechanism includes a crankcase having a suction inlet opening providing communication into a suction cavity within the crankcase. A suction line adaptor is provided for attaching to a suction line of a refrigeration system to introduce suction gas from the exterior of the housing to the suction inlet opening within. The suction line connector includes a fitting mounted to the housing sidewall and having a bore communicating therethrough, and a tube insert extending between the fitting and the suction inlet opening. The tube insert includes annular protuberances at opposite ends thereof, each protuberance having a groove into which an O-ring seal is retained.
    Type: Grant
    Filed: March 8, 1989
    Date of Patent: November 13, 1990
    Assignee: Tecumseh Products Company
    Inventor: Edwin L. Gannaway
  • Patent number: 4969803
    Abstract: The invention includes a compressor unit with a connected drive by a high-frequency motor for compressing gases and which is suitable for great ocean depths and for natural gas conveyance from the ocean floor where the low temperature obtaining in the water is effectively utilized. The compressor unit is supported by magnetic bearings in a housing. The compressor includes a plurality of compressor stages connected by pipe lines which form a surface cooler on the suction side arranged around the housing.
    Type: Grant
    Filed: September 1, 1988
    Date of Patent: November 13, 1990
    Assignee: MAN Gutehoffnungshutte GmbH
    Inventor: Lubomyr Turanskyj
  • Patent number: 4968229
    Abstract: To enable geriatric or morbid users to be able to insert a delivery tube (11) into a pressure infusion apparatus (1) between the delivery or pumping mechanism (3, 23) and pressure or application means (2, 22, 32) a cam plate is arranged which bears with a portion of its outer periphery on the pressure means which presses against the action of a spring against the cam plate. Via rotation direction-dependent drivers (8) the cam plate is connected to the delivery mechanism (3, 23) in such a manner that for a given direction of rotation the delivery mechanism (3, 23) and the pressure means can be moved towards or away from each other.
    Type: Grant
    Filed: August 15, 1989
    Date of Patent: November 6, 1990
    Assignee: Fresenius AG
    Inventor: Klaus Neuder
  • Patent number: 4968225
    Abstract: A magnet holder for an electromagnetic diaphragm pump comprising a reinforcing member having at least in part thereof a width smaller than the distance between a pair of magnets placed in the predetermined positions in magnet insertion windows is provided integrally with the magnet holder between the pair of magnet insertion windows for juxtaposing and holding a pair of flat plate-shaped magnets in the same plane, so that the mechanical strength of the magnet holder is prevented from decreasing. And positioning members may be formed in the reinforcing member for pressing the pair of magnets inserted into the magnet insertion windows toward the diaphragms attached to opposite ends of the magnet holder, thereby positioning the magnets with enough accuracy and determining the distance between the magnets.
    Type: Grant
    Filed: December 5, 1989
    Date of Patent: November 6, 1990
    Assignee: Nitto Kohki Co., Ltd.
    Inventors: Atsuki Hashimoto, Masaaki Tanabe
  • Patent number: 4964786
    Abstract: The present invention is a vertically upright hermetic compressor for mounting to a horizontal support surface. The compressor comprises a housing with a bottom end having an annular groove, a motor compressor unit operably disposed within the housing, and a mounting boot. The mounting boot is affixed to the housing's bottom end, having a resilient body member engaged with the groove to secure vertically the housing. An adhesive is used to bond the boot to the housing bottom, and adhesive can be used to secure the boot to a horizontal support surface of an appliance.
    Type: Grant
    Filed: June 14, 1989
    Date of Patent: October 23, 1990
    Assignee: Tecumseh Products Company
    Inventor: Michael J. Maertens
  • Patent number: 4964789
    Abstract: A fuel injection pump for internal combustion engines has a pump piston that is axially and rotationally movable in a cylinder and has a control edge and a diversion edge that defines a recess in the jacket face of the pump piston. To limit and adjust the effective supply stroke, the control edge and the diversion edge cooperate with a control opening in the cylinder, which opening communicates with a fuel-filled low-pressure chamber. To prevent cavitation damage during the diversion process, a pre-diversion groove, which extends approximately parallel to the diversion edge, is provided in the portion of the jacket face of the pump piston defined by the control edge and the diversion edge. It is disposed at a distance from the diversion edge such that immediately before the entry of the diversion edge into the control opening, representing the onset of diversion, it connects the pump work chamber, which is at high pressure, to the control opening.
    Type: Grant
    Filed: January 27, 1989
    Date of Patent: October 23, 1990
    Assignee: Robert Bosch GmbH
    Inventors: Hans Schueler, Heinz Lauterbach, Helmut Tschoeke, Richard Kinzel, Theodor Stipek
  • Patent number: 4961692
    Abstract: The present invention provides a pump by vessel oscillation including a vessel having an inlet for liquid and an outlet opening in a specific tangential direction of an outer peripheral portion thereof. The vessel is oscillated in a specific direction to outflow the liquid through the outlet opening. Accordingly, the liquid in the interior of the vessel undergoes a simple centrifugal motion and when the pump is used for a blood circulation device such as an artificial heart or assisted circulation device, the blood is completely shut off from outside and isolated from entry of various germs, air, foreign matter, etc. The pump is simple is construction and excellent in reliability and durability.
    Type: Grant
    Filed: May 16, 1989
    Date of Patent: October 9, 1990
    Inventors: Yasuhiro Fukui, Osamu Miyashita
  • Patent number: 4955796
    Abstract: Refrigerant compressor construction having a cylinder, a piston mounted for reciprocation in the cylinder, a cylinder head mounted over the end of the cylinder to provide a compression chamber, and refrigerant discharge valving in the cylinder head or a valve plate assembled thereto adapted to open a discharge passage for pressurized refrigerant on the compression stroke of the piston means and to close the discharge passage on the suction stroke of the piston, a first suction gas inlet passage through the wall of the cylinder at a position remote from the cylinder head, a second suction gas inlet passage in the piston extending through the outer wall thereof and in continuous communication with the first passage, a suction gas port in the top of the piston in communication with the second passage, the port having a valve seat formed in the top of the piston and a valve disc mounted on the top of the piston for limited axial, floating movement and having a sealing surface adapted to bear against the valve sea
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: September 11, 1990
    Assignee: Bristol Compressors, Inc.
    Inventor: Gerald L. Terwilliger
  • Patent number: 4954055
    Abstract: A variable diameter tube for use with a roller pump which is formed with a central large diameter section that is positioned in the roller pump raceway. This tube is formed with two end portions of substantially similar internal diameter with the diameter of the tube gradually increasing towards the central section. The gradual increase in diameter is no greater than about thirty degrees per inch and the wall thickness of the tubing wall is substantially equivalent along its entire length.
    Type: Grant
    Filed: June 22, 1989
    Date of Patent: September 4, 1990
    Assignee: Baxter International, Inc.
    Inventors: Donald A. Raible, William K. Morrow
  • Patent number: 4954049
    Abstract: An air circulation device including a blower having a hollow housing with a rotatable squirrel cage blower incorporated therein with discharge louvers being adjustable for controlling the direction of air flow discharged from the air circulation device. The air circulation device is supported on a stand of hollow construction having air inlet openings elevated above the lower end thereof together with a filter structure associated with the air inlet openings to remove particulate material and pollutants from the air taken into the air circulation device with hollow air transfer members extending from the hollow stand to the interior of the squirrel cage blower through doughnut shaped seal devices of lightweight compressible foam material.
    Type: Grant
    Filed: June 27, 1989
    Date of Patent: September 4, 1990
    Inventor: Joseph M. Armbruster
  • Patent number: 4954046
    Abstract: A linear peristaltic pump includes a mechanism for maintaining linear flow of fluid through an I.V. tube. The mechanism comprises a casing carrying a rotatable camshaft having a plurality of cams spaced therealong in helical arrangement and a plurality of fingers coupled to the camshaft. A housing for establishing linear reciprocal movement of the fingers in response to rotation of the shaft establishes a moving zone of occlusion along a tube held against the fingers. Aligning means are included for establishing an axis of rotation of the camshaft which is slightly tilted with respect to the tube. This is accomplished by raising or lowering the upstream or the downstream end of the camshaft to prevent unwanted pressure from building up in the tube to reduce pulsatile flow and maintain linear flow. The aligning mechanism comprises a generally cylindrical bushing having an eccentric hole therethrough for carrying the hinged connection between the casing and the housing.
    Type: Grant
    Filed: December 8, 1989
    Date of Patent: September 4, 1990
    Assignee: IMED Corporation
    Inventors: Ronald D. Irvin, David Burkett, David E. Kaplan, Ronald J. Harvey
  • Patent number: 4952124
    Abstract: A medicine injector includes a finger pump which comprises an injection tube containing a liquid medicine and a plurality of fingers adapted to move in a specified sequence to compress this tube. The widths of these fingers are effectively varied by simultaneously compressing the tube with specified two or more of these fingers. This has the effect of increasing the amount of liquid which can be ejected out of the tube and to minimize the effects of a backflow.
    Type: Grant
    Filed: March 24, 1986
    Date of Patent: August 28, 1990
    Assignee: Sharp Kabushiki Kaisha
    Inventor: Mitsuji Ogami
  • Patent number: 4950136
    Abstract: A peristaltic pump includes rotor-mounted rollers biased apart and having end steps for engaging corresponding cam surfaces on the pump body and cover to direct non-pumping rollers in a predetermined path and maintain a constant tube engaging pressure on the pumping rollers. Radial pumping loads are transmitted through the rollers and biasing springs to the cam surfaces via rolling contact rather than to the rotor and its drive shaft. Drive shaft bearings are eliminated. The diameter of the end steps is different and preferably less than that of the tube engaging roller surface. Rollers having varying end steps are provided to accommodate different pumping tubes, desired spring pre-loads and the like.
    Type: Grant
    Filed: August 14, 1989
    Date of Patent: August 21, 1990
    Assignee: Hydro Systems Company
    Inventors: Richard E. Haas, Thomas R. Fegette