Patents Examined by Carlton R. Croyle
  • Patent number: 6631610
    Abstract: In an integral rocket-ramjet engine the air intake ports are covered with a port cover made of a laminate of Pd and Al. This port cover is rapidly consumed in the brief period between the end of the rocket mode and commencement of the ramjet mode to allow ingress of ram air for the ramjet engine.
    Type: Grant
    Filed: July 5, 1983
    Date of Patent: October 14, 2003
    Assignee: The United States of America as represented by the Secretary of the Air Force
    Inventor: Richard A. Van Dyk
  • Patent number: 5025185
    Abstract: A bubble trap for a submersible pump is provided that is placed above the stator assembly of the motor and within sealant material located around the coils of the motor. The bubble trap helps prevent moisture from working its way throught the sealant material through the coils by traveling through bubbles in the sealant material. The bubble trap improves product safety and quality and reduces production rejects, thereby improving production time and efficiency.
    Type: Grant
    Filed: June 7, 1988
    Date of Patent: June 18, 1991
    Assignee: Aquaria, Inc.
    Inventor: Robert F. Reinoehl
  • Patent number: 4986727
    Abstract: An oil well swabbing device having a pressure activated valve for use in closing a fluid passage therein when the swabbing device is submerged under liquid in a well casing corresponding to a predetermined valve closing pressure; the pressure-activated valve comprising a pressure collapsible bladder such as a bellows or diaphragm, a valve and seat interposed in the fluid passage, and an actuator rod connecting the valve to the pressure collapsible bladder such that the valve is closed when the bladder is collapsed to a degree corresponding to the predetermined valve closing pressure. Improved speed brakes, catchers, and position indicators for oil well swabbing devices are also disclosed.
    Type: Grant
    Filed: July 20, 1988
    Date of Patent: January 22, 1991
    Assignee: Petro-Well Supply, Inc.
    Inventor: James R. Blanton
  • Patent number: 4984971
    Abstract: An anti-vibratory device for attaching a hermetic compressor chamber to a base, comprises a first part located inside the chamber, consisting of several springs placed between the compressor and studs fixed to the bottom of the chamber, and a second part consisting of a block of elastic material, with means of fixing this to the chamber and the base. The underside of each stud is provided with a threaded recessed hole accessible from outside the chamber and each block of elastic material is fixed to the base and corresponding stud, and thereby to the chamber, by means of a screw into this hole.
    Type: Grant
    Filed: December 1, 1981
    Date of Patent: January 15, 1991
    Assignee: L'Unite Hermetique
    Inventor: Emile Bergeron
  • Patent number: 4967599
    Abstract: The present invention relates to a mechanical and insulating connection between, on the one hand, a filament-wound casing, constituting a wall for the combustion chamber of a solid propellant rocket motor, and on the other hand, a hot nozzle made from a heat-conducting refractory material wherein said connection consists of a single connecting ring fixed to the nozzle and resiliently connected to the wound casing, which ring is made from a low density insulating material, resistant to mechanical forces, as well as to mechanical shocks and thermal stresses, preferably a composite material with multidirectional reinforcements and a ceramic matrix.
    Type: Grant
    Filed: February 2, 1984
    Date of Patent: November 6, 1990
    Assignee: Societe Europeenne de Propulsion
    Inventor: Paul Donguy
  • Patent number: 4943210
    Abstract: A control system for a pump includes a level sensor switch that is positioned along a production string in an oil well shaft. The level sensor switch is protected from damage by inner and outer housings. A control circuit responsive to the level sensor switch is also provided. The control circuit includes an adjustable timer that is located at ground level remote from the harsh environment of the oil well shaft. The timer controls the operation time of the pump during each pumping cycle.
    Type: Grant
    Filed: February 7, 1989
    Date of Patent: July 24, 1990
    Inventors: James R. Bailey, Jr., Jean D. Ashcraft
  • Patent number: 4930306
    Abstract: Carbon buildup in a turbine engine including a compressor 16 coupled to a turbine wheel 22 mounted for rotation about an axis and having a nozzle 24 disposed to direct gas at the turbine wheel 22 to drive the same, an annular combustor 26 disposed about the axis and in fluid communication with the nozzle 24 and having a radially inner wall 32, a radially outer wall 34 and a generally radially extending wall 46, a plurality of fuel injectors 48, a compressed air plenum 42, 44, 45 surrounding the combustor 26, a plurality of circumferentially spaced apertures 66 in the radial wall 34 and a cooling strip 68 for directing air passing through the apertures 66 along the radial wall 39 is reduced by locating the apertures 66 closely adjacent the radially outer part of the radial wall 39 and locating the cooling strips 68 to direct air passing through the apertures 66 inwardly as at 72 along the radial wall 39.
    Type: Grant
    Filed: May 26, 1988
    Date of Patent: June 5, 1990
    Assignee: Sundstrand Corporation
    Inventor: Jack R. Shekleton
  • Patent number: 4913624
    Abstract: A low pulsation displacement pump has a pair of plungers and motor driven-cams or feed screws for reciprocating the plungers. In order to cause the pump to stably discharge a liquid so that variation in discharge due to machining errors of the plungers or the feed screws is eliminated, the pump discharge pressure is measured at each of a plurality of predetermined operative positions of the plungers before delivery of the pump from a manufacturing plant, and machining errors are obtained in accordance with the thus-measured discharge pressure. Then, the speed correction factor for the motor is calculated for each of the plurality of predetermined positions of the plungers in accordance with the thus-obtained errors to store the results of the calculation in a memory.
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: April 3, 1990
    Assignee: Hitachi, Ltd.
    Inventors: Kiwao Seki, Tsuyoshi Nishitarumizu
  • Patent number: 4900236
    Abstract: Ceiling fan consisting of a rotatable assembly to which the fan blades are attached and a stationary assembly connected to capable of being connected to a suspension means. These assemblies have a common centerline, and the rotary assembly comprise the rotor and the stationary assembly the stator, located concentrically inside the rotor, of an electric motor. The rotatable assembly is mounted rotatable relative to the stationary assembly by means of a tubular member extending coaxially with the centerline and a shaft located therewithin. Two bearings are located at a distance one above the other and are mounted between the shaft and the tubular member, at least one of which bearings comprises a rolling bearing. The other one of the two bearings comprises a journal bearing.
    Type: Grant
    Filed: March 8, 1988
    Date of Patent: February 13, 1990
    Assignee: SKF Industrial Trading and Development Co.
    Inventor: Hendrikus J. Kapaan
  • Patent number: 4897023
    Abstract: An assembly for a liquid pump having inlet and outlet ports at its front side and an electric motor mounted on its operating shaft at its back side includes a one piece housing, preferably molded of a plastic. The housing includes a substantially flat top wall, a U-shaped bottom wall having the ends of its arms integral with the sides of the top wall, and a back wall integral with and extending across one end of the top wall and bottom wall with the other end of the housing being open. A mounting plate is secured to the pump between the pump and the motor. The pump and motor assembly is mounted in the open end of the housing with the motor being within the housing and the mounting plate being seated against the open end of the housing. Bolts extend through openings in lugs projecting from the arms of the bottom plate and are threaded into holes in lugs on the sides of the mounting plate to secure the mounting plate to the housing.
    Type: Grant
    Filed: November 28, 1988
    Date of Patent: January 30, 1990
    Assignee: Milton Roy Company
    Inventor: Douglas J. Bingler
  • Patent number: 4895494
    Abstract: A double acting diaphragm pump includes a flat valve construction which is reversible to provide valving for both the inlet and outlet to the pumping chamber. A modular manifold construction cooperates with the flap valve construction to facilitate ease of replacement of the flap valve construction and case of repair of the diaphragm pump.
    Type: Grant
    Filed: July 15, 1988
    Date of Patent: January 23, 1990
    Assignee: The ARO Corporation
    Inventor: Richard K. Gardner
  • Patent number: 4895493
    Abstract: A rotary pump mechanism is disclosed which comprises a coupling section that couples an impeller and drives the coupling section and, in turn, the impeller. The coupling section incorporates most of the components of the pump that wear out and are expensive. As a result, the impeller can be disposed of without disposing of other components. The coupling section can also be changed for continuous operation of a single impeller. Although the preferred application of the invention is in the area of pumping blood and other biological fluids, the disclosed invention has utility in any application where it is desirable to turn an "impeller-like" element.
    Type: Grant
    Filed: August 18, 1988
    Date of Patent: January 23, 1990
    Inventor: Harold D. Kletschka
  • Patent number: 4895499
    Abstract: Outlet valve assembly for a paint sprayer and the like includes a spring stop engageable by the outlet valve during opening of the outlet valve to dampen the outlet valve movement during opening of the outlet valve. There is a slight initial clearance between the spring stop and outlet valve when the outlet valve is in the closed position. During each cycle of operation of the paint sprayer, the impact of the outlet valve striking the spring stop compresses the spring stop somewhat, whereby the distance between the spring stop and outlet valve when the outlet valve is in the closed position is less than when a rigid stop is used to obtain the desired amount of outlet valve travel during opening of the outlet valve. At the end of the delivery stroke of the pump, the force of the spring stop acting on the outlet valve pushes the outlet valve to the closed position.
    Type: Grant
    Filed: September 22, 1986
    Date of Patent: January 23, 1990
    Assignee: The Wooster Brush Company
    Inventor: Eugene F. Gargas
  • Patent number: 4895496
    Abstract: A refrigeration motor compressor assembly has a housing including a lubricant sump in the bottom thereof into which the lower end of the drive shaft and associated rotor extend. A shield is provided which is positioned by the drive shaft and extends above the oil level in the sump in surrounding spaced relationship to the lower end of the rotor. As the rotor rotates within the shield, lubricant contained therein is thrown out of the surrounding shield and a close fit between the shield and the shaft restricts return flow of lubricant into the area occupied by the rotating rotor.
    Type: Grant
    Filed: June 8, 1988
    Date of Patent: January 23, 1990
    Assignee: Copeland Corporation
    Inventor: John P. Elson
  • Patent number: 4893991
    Abstract: The efficiency and accuracy of a peristaltic pump is increased simply and inexpensively by controlling the cross sectional configuration of the section of flexible tubing which is operated upon the pump thrust members during a pumping operation. Specifically, the section of tubing, which is normally generally cylindrical in configuration, is held partially constricted or compressed upon being mounted in the pump, so that it becomes generally oval in cross sectional configuration. The thrust members of the pump, when the latter is operating, thus repeatedly compress a section of tubing which is already partially compressed, and which never is allowed to expand fully back to its cylindrical configuration. This substantially reduces the drop in feed rate heretofore experienced by similar pumps because of tubing fatigue and augument.
    Type: Grant
    Filed: October 19, 1988
    Date of Patent: January 16, 1990
    Inventors: James F. Heminway, Eric P. Freischlag
  • Patent number: 4893475
    Abstract: Combustion apparatus for a gas turbine engine comprises a burner which is so configured and located within a combustion chamber so as to urge fuel and air mixture ejected therefrom into a fuel rich toroidal vortex in an upstream first combustion zone of the combustion chamber. Unburnt fuel from the first combustion zone is mixed with additional air in a second fuel weak combustion zone downstream of the first zone. Adjustment of the air to fuel ratios in the two combustion zones results in the reduction of smoke and oxides of nitrogen reduction.
    Type: Grant
    Filed: July 17, 1989
    Date of Patent: January 16, 1990
    Assignee: Rolls-Royce plc
    Inventor: Jeffrey D. Willis
  • Patent number: 4892464
    Abstract: A pump apparatus for supplying water and air via suitable respective feeding apparatus to a swimming pool or similar facility, with an electric motor for driving the pump apparatus comprising channel sections surrounding, at least partially, the electric motor by forming an annular gap, the air being feedable through the channel sections to a collecting chamber which is connected to a supply member for delivering air to said water feeding apparatus and/or to said swimming pool.
    Type: Grant
    Filed: May 6, 1988
    Date of Patent: January 9, 1990
    Inventor: Martin T. Schydlo
  • Patent number: 4892468
    Abstract: A hydraulic pump is disclosed, characterized in that, in the hydraulic pump including a cylinder body having a cylinder chamber, a suction port and an ejection port, a cam member and a reciprocatingly movable member are provided, wherein oil in said cylinder chamber is ejected when said movable member is pushed into said cylinder chamber by the cam member, a cylindrical piston is slidably fitted into said cylinder chamber, so that the movable member is engaged with the cylindrical piston when it is pushed into the cylinder chamber so shut off communication between the cylinder chamber and the suction port and a valve provided in the ejection passage communicating to said ejection port is opened due to the pressure rise when said movable member is further pushed into said cylinder chamber to eject the oil in the cylinder chamber outwardly.
    Type: Grant
    Filed: August 8, 1988
    Date of Patent: January 9, 1990
    Assignees: Akebono Brake Industry Co., Ltd., Akebono Research, Development Centre Ltd.
    Inventor: Toshifumi Maehara
  • Patent number: 4892463
    Abstract: The invention relates to an ejector to be placed in rooms which are inaccible to human beings. It comprises a casing with a diffuser bore, a head chamber, and a space for a working fluid including a lateral working fluid connection. The working fluid nozzle comprises a working fluid chamber which is connected through bores with the working fluid space and, inside the casing, it seals the head chamber from the working fluid space. The nozzle of the working fluid chamber opens into the head chamber and faces the diffuser bore. The invention is characterized in that the ends of the casing and of the working fluid nozzle each are embodied as a radial flange which flanges are held together by bolts adapted to be operated by a manipulator. At the end of the working fluid nozzle flange there is a handle which is operable by a manipulator to pull the working fluid nozzle out of the casing and to reintroduce it, respectively.
    Type: Grant
    Filed: September 9, 1988
    Date of Patent: January 9, 1990
    Assignee: Deutsche Gesellschaft fur Wiederaufarbeitung von Kernbrennstoffen mbH
    Inventors: Hans Meyer, Manfred Steegmanns
  • Patent number: 4890984
    Abstract: A modular infusion pump system utilizes a positive displacement pump for pumping a known quantity of fluid for each stroke. A plurality of longitudinally spaced apart fixed combs cooperate with a resilient tube to define a known pumping volume. A plurality of movable combs are interdigitated with the fixed combs and are periodically linearly directed to cause the pump volume to be compressed, and therefore the fluid expelled. A rotary to linear drive system is connected with the movable combs and a ratchet system prevents counterrotation when the motor is in the off position. Valves are disposed above and below the pumping unit to appropriately seal off the pumping volume. The valves and the movable combs are operated by means of cams carried by a common shaft.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: January 2, 1990
    Inventors: Richard K. Alderson, Ronald D. Sleater, James R. Talley