Patents Examined by Robert E. Garrett
  • Patent number: 4936742
    Abstract: A water pump apparatus has an impeller mounted on a driven rotational shaft rotatably supported by mutually spaced bearing portions in a body member. In order to lubricate the sliding bearing surfaces between the bearing portions and the rotational shaft, oil seals surrounding the rotational shaft define first and second oil tanks, while a third oil tank is defined between the bearing portions. Spiral oil circulating grooves pump oil from the first and second tanks along the sliding bearing surface to the third tank in order to lubricate the sliding bearing surfaces. Oil passages in the bearing portions permit oil to be returned to the first and second tanks. An annular flange fitted on the rotational shaft fits between the bearing portions to provide axial bearing support for the rotational shaft. Excess oil pressure arising due to heat build up is relieved by a check valve mounted in the body member.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: June 26, 1990
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Katsuhiko Eguchi, Atsushi Ohmi
  • Patent number: 4936746
    Abstract: A propeller system has a pair of hub assemblies driven in counter-rotation, each hub assembly having a mechanical pitch change actuator, each actuator being provided with a pitch lock that rotates simultaneously with the motion of the actuator to allow the actuator to set propeller blade pitch, but locks the propeller blade positionally when not rotating simultaneously with the actuator, and a differential for transmitting a pitch change signal across a rotating gap between the two hub assemblies and for providing power to a means for providing the pitch change signals. A pair of motors provide the rotative signal to set the pitch of the blades in each hub assembly. One of the pair of motors drives the actuator towards high pitch and the other motor drives the actuator towards low pitch. A synchronizer coordinates the signals of the first and second motors so that a pitch lock moves simultaneously with the actuator.
    Type: Grant
    Filed: October 18, 1988
    Date of Patent: June 26, 1990
    Assignee: United Technologies Corporation
    Inventors: Millard G. Mayo, Edward H. Kusiak, Philip E. Barnes, Paul A. Carvalho
  • Patent number: 4936195
    Abstract: A brake booster includes a key member coupled to a valve plunger. When the booster is inoperative, the key member is brought into abutment against an inner wall surface of a shell to limit a free retracting movement of a valve plunger and its connected input shaft so that a lost stroke of the input shaft can be reduced when the brake is operative for the next time. According to the invention, a shell includes a cylindrical extension which is circumferentially and integrally formed with an annular bulge which extends radially inward, with a seal member disposed on the rear side of the annular bulge.
    Type: Grant
    Filed: October 27, 1988
    Date of Patent: June 26, 1990
    Assignee: Jidosha Kiki Co., Ltd.
    Inventor: Shintaro Uyama
  • Patent number: 4936751
    Abstract: A universal fan blade mounting assembly including an elongated bar having flanges at each end. One of the flanges is shaped to cooperate with one end of a fan blade and the other flange is constructed for attachment to a ceiling fan rotor. The rotor connecting flange includes two holes therein one of the holes is round for encircling a fastening screw. The other hole forms an arcuate slot. The hole and slot cooperate such that the elongated bar extends outwardly from the center of the rotor such that the functional relationship between the fan blade and the rotor may be maintained.
    Type: Grant
    Filed: July 28, 1989
    Date of Patent: June 26, 1990
    Inventor: John C. Marshall
  • Patent number: 4936741
    Abstract: A regulating method for preventing surges in a turbocompressor by initiating blow-off when necessary during operation. Flow to the turbocompressor and the compressor outlet pressure are measured continuously, and a first regulating difference is calculated from these measurements. This first regulating difference is then applied as an input parameter to a regulator which has a limited response rate. The output of this regulator is then used as a regulating parameter for a blow-off valve. The blow-off valve is opened rapidly by safety controls under malfunctioning conditions that tend to stress the limited response rate of the regulator. A second regulating difference is calculated from the preceding measurements or from the first regulating difference to indicate the need to open rapidly the blow-off valve.
    Type: Grant
    Filed: March 9, 1989
    Date of Patent: June 26, 1990
    Assignee: MAN Gutehoffnungshutte AG
    Inventor: Wilfried Blotenberg
  • Patent number: 4934143
    Abstract: An electrohydraulic system for control of a variable output pump includes a microprocessor-based controller receiving inputs from condition sensors coupled to the pump and command inputs from a remote master controller. The controller supplies outputs to an electrohydraulic valve for metering hydraulic fluid to a pump control port and thereby controlling pump operation in any one of a number of preselected and prestored pump control modes. A hydromechanical valve is connected in parallel with the electrohydraulic valve for controlling pump operation in the event of electrical malfunction or failure. Circuitry connected between the pump condition sensors and the control computer prevents aliasing errors due to mismatch between the computer sampling frequency and pump speed.
    Type: Grant
    Filed: February 9, 1989
    Date of Patent: June 19, 1990
    Assignee: Vickers, Incorporated
    Inventors: Larry O. Ezell, John Schmid, Peter Tovey
  • Patent number: 4934249
    Abstract: The setting of the dead travel of a servo-motor for assistance during braking is carried out in the factory during its assembly. For this purpose, a subassembly (68) comprising the piston (20), the operating pushrod (30) and its plunger (28), the valve head (34), the springs (38, 40) and the fixed (44) and tilting (50) keys, is placed in a setting sleeve (70). A load (F1) is exerted on the front face of the piston (20) sufficient to maintain a bearing surface (20b) permanently against a reference surface (70a) formed on the sleeve, and the pushrod (30) is freed from the action of the spring (40) by means of a fork (70a) formed on the sleeve, and the pushrod (30) is freed from the action of the spring (40) by means of a fork (72), after having pushed the plunger (28) up against the valve head (34) by applying a load (F3), the movement (.DELTA.) made by the mobile key (50) is measured between the reference surface (170a) and a shoulder formed on the plunger (28).
    Type: Grant
    Filed: August 5, 1988
    Date of Patent: June 19, 1990
    Assignee: Bendix France
    Inventors: Jean-Pierre Gautier, Perez Miguel
  • Patent number: 4934900
    Abstract: An assembly for a cylindrical cage which includes vanes made up of blades and end lugs. The end lugs and vanes are attached to a frame by a ring element with a fastener securing the ring element, end lug and blade to the frame. The end lugs are dimensioned and shaped so that when the end lugs of adjacent vanes are nested together, the vanes are spaced apart the desired amount and the angular relationship between vanes is maintained so that the gas flow path between adjacent vanes has the desired configuration. The blades can be made separate from or integral with the end lugs. The invention is particularly designed for use in mounting guide vanes in a cage type air classifier for classifying particulate materials.
    Type: Grant
    Filed: July 31, 1989
    Date of Patent: June 19, 1990
    Assignee: Fuller Company
    Inventors: Bernard H. Schonbach, Roger A. Powell, Belle M. Lukacz, Stephen A. Lukacz
  • Patent number: 4934250
    Abstract: A brake booster which includes a control slide that is displaceably supported in a servo piston and acted upon by a piston rod under the influence of brake pressure. The control slide has bores that establish communication between a pressure chamber and a pressure source or return for power brake fluid in the pressure chamber. The control slide is intended to penetrate a control bush in a stepped bore in the servo piston, which has a radial bore for connecting the pressure source with a radial bore in the control slide toward the pressure chamber. The control bush is supported radially movably in the stepped bore.
    Type: Grant
    Filed: January 5, 1989
    Date of Patent: June 19, 1990
    Assignee: Robert Bosch GmbH
    Inventor: Heinz Siegel
  • Patent number: 4934144
    Abstract: Main brake cylinder (1) with brake fluid container (6). A valve (10) is arranged in the connection between the container and the interior of the cylinder. If the container becomes detached from the cylinder, the valve is closed automatically and prevents brake fluid from running out.
    Type: Grant
    Filed: April 10, 1989
    Date of Patent: June 19, 1990
    Assignee: AB Volvo
    Inventor: Anders Larin
  • Patent number: 4932644
    Abstract: The present invention provides a process for feeding transparency sheets having a soft coating thereon from a tray of such sheets. The transparency sheets are interleaved with plain paper separator sheets in a tray so that at the front end of the tray, the ends of the plain paper separator sheets extend beyond the ends of the transparency sheets. A sheet feed means positioned adjacent the front end of the tray engages the extended end of the first of the plain paper separator sheets in the tray. At start up, the sheet feed means does not engage the transparency sheets. The sheet feed means moves the engaged plain paper separator sheet from the tray wherein the movement of the engaged plain paper separator sheet moves the adjacent transparency sheet from the tray.
    Type: Grant
    Filed: May 8, 1989
    Date of Patent: June 12, 1990
    Assignee: The Mead Corporation
    Inventor: Paul F. Nzei
  • Patent number: 4932645
    Abstract: An apparatus and method for controlling a collator having a plurality of delivery conveyors are disclosed. The collator includes a plurality of hoppers for feeding a plurality of signatures to a plurality of gathering stations or pockets which moves past the hoppers. An assemblage, i.e., a group of collated signatures is formed in each of the plurality of pockets. The plurality of delivery conveyors receives assemblages from the plurality of pockets during operation of the collator. If a fault condition is detected downstream of one of the plurality of delivery conveyors, then receipt of assemblages by the one delivery conveyor is interrupted while receipt of assemblages by the other of the plurality of delivery conveyors is maintained. The result is that only the one delivery conveyor with the downstream fault condition ceases delivering assemblages. All production from the collator does not cease. Production and delivery of assemblages onto the delivery conveyors with no fault condition are maintained.
    Type: Grant
    Filed: March 29, 1989
    Date of Patent: June 12, 1990
    Assignee: AM International Incorporated
    Inventors: James E. Schorey, Jeffrey C. Cadow
  • Patent number: 4930402
    Abstract: A hydraulic cylinder-piston unit comprises primary cylinder-piston unit with an integrated position regulation and with a primary cylinder and a primary piston movable in the primary cylinder, two displacement chambers in the primary cylinder and including two displacement pistons, a displacement piston rod connecting the displacement pistons with one another, and a separating wall, and differential cylinder-piston unit formed by the primary piston and having a differential cylinder provided with working chambers.
    Type: Grant
    Filed: May 27, 1988
    Date of Patent: June 5, 1990
    Assignee: Bauakademie d. Deutschen Dem. Republik
    Inventors: Hans Forchheim, Matthias Schlieder
  • Patent number: 4930404
    Abstract: The very high pressure piston pump can compress a conveying agent (20) to a pressure of approximately 22 kbar. The high pressure sealing comprises a pressure-compensated ice sealing, which operates free of leakage and with reduced friction. To reduce the generally very high frictional forces in the ice sealings, a rotation is superimposed on the translation of the piston (10). The entire machine may be regulated by means of a microprocessor, depending upon the operational parameters and the feed efficiency. Its very high pressure seal has a long service life, even under continued operation in very high pressure ranges.
    Type: Grant
    Filed: August 19, 1988
    Date of Patent: June 5, 1990
    Inventor: Fritz Zbinden
  • Patent number: 4930990
    Abstract: A clutch fan has a new and unique blade design that results in quieter and more efficient operation. The blade design involves the leading edge having inner, intermediate, and outer regions such that the intermediate region is of increasing skew in the direction of rotation and the outer region is of decreasing skew. The pitch ratio increases as a function of increasing blade radius. Along the outer region, the blade increases in pitch on a defined curvature as a function of blade radius and angle to form a tip curl.
    Type: Grant
    Filed: September 15, 1989
    Date of Patent: June 5, 1990
    Assignee: Siemens-Bendix Automotive Electronics Limited
    Inventor: Stephen E. Brackett
  • Patent number: 4930311
    Abstract: The invention relates to a safety arrangement for a controlled drive which is connected to a conduit with impressed pressure. When the safety arrangement responds the machine is separated via shutoff valves from the inlet and outlet and a via a switchover valve the pivot angle of the machine is set to the maximum value so that the largest possible braking torque can be automatically set.
    Type: Grant
    Filed: August 22, 1988
    Date of Patent: June 5, 1990
    Assignee: Mannesmann Rexroth GmbH
    Inventor: Jorg Dantlgraber
  • Patent number: 4930987
    Abstract: Each blade includes at its root a root portion that slides axially into a re-entrant cavity that extends axially in the hub. End caps prevent axial removal of the blade roots from the hub. Thus, it is possible to replace an individual damaged blade, and the hubs are interchangeable from ship to ship, although the blades may vary slightly. All of the parts are injection molded of a high-strength fiber-reinforced plastic. The entire assembly can be produced at approximately half the cost of conventional metal propellers. The propeller is intended for use with engines developing 90-250 HP, and the diameter of the propeller is 16-18 inches. The various parts includes apertures and passages so as not to interfere with the discharge of exhaust gases.
    Type: Grant
    Filed: May 24, 1989
    Date of Patent: June 5, 1990
    Inventor: Brad Stahl
  • Patent number: 4930978
    Abstract: A compressor stage or a turbocharger having a compressor stage having an inducer shroud with two or more vents. A first vent is provided with a second vent upstream thereof, allowing for outflow during surge conditions and inflow during choking conditions. Surge line characteristics may be varied by selectively locating the position of the first and of the second vents, and by selectively determining the effective width of the vents. The vents may be circumferential slots, and may be slanted. An outer shroud is provided forming a venting chamber for recirculation of gas into the gas intake. A third vent may be provided to vent the diffuser.
    Type: Grant
    Filed: July 1, 1988
    Date of Patent: June 5, 1990
    Assignee: Household Manufacturing, Inc.
    Inventors: Jai K. Khanna, Norman G. Silvey, Charles D. Williams
  • Patent number: 4930406
    Abstract: A refrigerant compressor construction including one or more cylinders and pistons and a cylinder head mounted over the end of the cylinders, the head having a base, a first wall providing a suction chamber and a second wall providing a discharge chamber, each of the walls being unitary with the base and spaced from each other to provide a thermal barrier between the chambers to minimize suction gas heating.
    Type: Grant
    Filed: September 21, 1988
    Date of Patent: June 5, 1990
    Assignee: Bristol Compressors, Inc.
    Inventor: Milton M. Kosfeld
  • Patent number: 4930989
    Abstract: The present invention relates to fixed-angle keying pieces for blades of axial fans each having a U-shaped cross section, the internal surface of which perfectly fits the profile of the blade while the external surface of the same has a plane side face which rests on a supporting plate, the keying piece being obtained as a continuous extruded section which is subsequently cut to a desired size.
    Type: Grant
    Filed: April 20, 1988
    Date of Patent: June 5, 1990
    Assignee: Cofimco S.r.l.
    Inventor: Antonio Mosiewicz