Patents Examined by Abraham Hershkovitz
  • Patent number: 4836093
    Abstract: A piston assembly is disclosed which reduces the consumption of a lubricating agent circulated to provide lubrication between the outer sidewall of the piston assembly and the interior sidewall of a bore. This is accomplished by providing at least one aperture in at least one compression ring groove. The aperture is disposed in fluid communication with the interior of a hollow skirt portion of the piston for communicating such lubricating agent gathered in the compression ring groove into the interior of the hollow skirt portion of the piston so that the lubricating agent can return to the crankcase of an operating mechanism.
    Type: Grant
    Filed: July 3, 1986
    Date of Patent: June 6, 1989
    Assignee: American Standard Inc.
    Inventor: Daniel G. Wagner
  • Patent number: 4819433
    Abstract: The hydraulic brake system having at least one wheel brake is adapted to be pressurized by a master brake cylinder actuated by a hydraulic power booster. An auxiliary pressure is adjustable in a pressure chamber of the hydraulic power booster by means of a brake valve. Interposed between an auxiliary pressure source and the brake valve is a pressure-reducing valve that is controllable by the auxiliary pressure and contains a valve controlling a passageway, the valve being acted upon by the auxiliary pressure to open the passageway. To simplify the construction of the pressure-reducing valve, the closure member of the valve is exposed to the reduced pressure in the pressure-reducing valve such that a force related to the valve seat surface will be exerted on the closure member in the closing direction of the passageway of the pressure-reducing valve.
    Type: Grant
    Filed: June 10, 1983
    Date of Patent: April 11, 1989
    Assignee: ITT Industries, Inc.
    Inventor: Juan Belart
  • Patent number: 4791854
    Abstract: A hydraulic piston and cylinder arrangement retains the outer surface of a sleeve forming the piston in dry condition. The cylinder provides an outer wall and an inner stem with the sleeve sliding inwardly of the outer wall and outwardly of the stem. A head on the end of the stem cooperates with the inner surface of the sleeve. A bearing member on the end of the sleeve remote from the head cooperates with the outer surface of the stem. A first chamber is thus defined between the head and a closure cap on the sleeve to provide an expansion chamber. An annular chamber between the outer surface of the stem and the inner surface of the sleeve and closed by the bearing member provides a return chamber. Two fluid channels coaxially arranged within the stem provide the communication of fluid to the chambers.
    Type: Grant
    Filed: March 2, 1987
    Date of Patent: December 20, 1988
    Inventor: Damir Banicevic
  • Patent number: 4790236
    Abstract: A springless floating coupling for a plunger type pump connecting the drive plunger to a driven piston.
    Type: Grant
    Filed: September 12, 1983
    Date of Patent: December 13, 1988
    Assignee: Beckman Instruments, Inc.
    Inventors: Scott Macdonald, William D. Homberg
  • Patent number: 4790725
    Abstract: The invention provides improvements to aerial propellers, particularly for aircraft propulsive units, wherein the cowling of the propeller is defined by a meridian line having: at its origin (B) a maximum curvature greater than 15; then a curvature decreasing rapidly from the maximum value to a value of 7; then a curvature decreasing linearly from the value 7 to a value of 0; than a curvature decreasing more slowly from the value 0 to a minimum value between -3 and -5; then a curvature increasing rapidly from the minimum value to a value of 0.
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: December 13, 1988
    Assignee: Office National d'Etudes et de Recherche Aerospatiales
    Inventors: Jean-Marc Bousquet, Alain Faubert
  • Patent number: 4790724
    Abstract: The mean line (F) of each blade (1) is formed by a flat continuous curve contained in a plane OZ-OY.sub.o forming with the plane of rotation of the propeller an angle .phi..sub.o between 35.degree. and 55.degree. and preferably between 40.degree. and 50.degree., said curve having a first part of negative Y.sub.o and positive Z coordinates, and a second part of positive Y.sub.o and positive Z coordinates, the coordinate point Y.sub.o =0 being situated between the values of Z included between 0.75 and 0.85 R (R designating the radius of the propeller), the tangent to this curve has its end corresponding to the end of the blade forming with the axis Oz an angle between 30.degree. and 50.degree. and preferably between 35.degree. and 45.degree..
    Type: Grant
    Filed: October 7, 1987
    Date of Patent: December 13, 1988
    Assignee: Office National d'Etudes et de Recherche Aerospatiales
    Inventors: Jean-Marc Bousquet, Alain Faubert, Georges Vingut
  • Patent number: 4790371
    Abstract: A tube-type heat exchanger comprises a plurality of tubes (1) all of which are of the same length, wound in the form of concentric cylindrical coils that touch each other, the pitch of the coils being different and the various coils being either wound in the same direction, or wound in alternately opposite directions. Each coil is comprised by one or more tubes bent to the same radius, the number of tubes in each coil increasing as the diameter of the coil.
    Type: Grant
    Filed: July 19, 1983
    Date of Patent: December 13, 1988
    Inventor: Daniel Zundel
  • Patent number: 4788821
    Abstract: A hydraulic apparatus for remotely controlling the operative mode selector of a motor vehicle automatic transmission. The apparatus comprises a master cylinder having an input member operatively connected to the transmission operative mode selection or shift lever placed at the disposal of the motor vehicle operator, and a slave cylinder mounted on or proximate the transmission casing and having an output member connected to the transmission operative mode selector, the master cylinder and the slave cylinder being placed in fluid communication through flexible conduits such that each displacement of the master cylinder piston as a result of displacement of the master cylinder input member causes a corresponding displacement of the slave cylinder piston coupled to the slave cylinder output member.
    Type: Grant
    Filed: September 24, 1987
    Date of Patent: December 6, 1988
    Assignee: Automotive Products, plc
    Inventors: David K. Mienko, John G. Vander Poorte, Keith V. Leigh-Monstevens
  • Patent number: 4789298
    Abstract: The method and apparatus for controlling the operation of a turbocompressor which has a suction and a discharge with a blow-off valve for regulating the performance thereof includes a sensor in the suction and discharge for sensing an operating condition such as pressure and temperature which is connected to deliver to a comparator a performance signal for the control of the blow-off valve. The control signal which is delivered to the comparator is modified in accordance with a memory which includes a blow-off curve gradient which effects the amplification of the signal which is sent to a controller in accordance with the blow-off conditions which are to be set in motion on the basis of the performance characteristics which have been sensed.
    Type: Grant
    Filed: November 10, 1986
    Date of Patent: December 6, 1988
    Assignee: Man Gutehoffnungshutte GmbH
    Inventor: Wilfried Blotenberg
  • Patent number: 4787205
    Abstract: A vehicle brake system, with the usual arrangement of a power booster axially aligned with the brake master cylinder piston and engaged between it and the brake pedal, has a fluid pressure differential-operated actuator offset from the conjoint axis of the power booster and the master cylinder piston. The actuator is coupled to the master cylinder piston through a mechanical linkage which provides a substantial mechanical advantage. The actuator causes the brakes to be applied independent of the brake pedal in response to any of several sensed conditions which dictate that the vehicle should not be moving.
    Type: Grant
    Filed: September 15, 1986
    Date of Patent: November 29, 1988
    Inventor: William G. Fontaine
  • Patent number: 4785615
    Abstract: A hydraulic apparatus for remotely controlling the operative mode selector of a motor vehicle automatic transmission. The apparatus comprises a master cylinder having an input member operatively connected to the transmission operative mode selection or shift lever placed at the disposal of the motor vehicle operator, and a slave cylinder mounted on or proximate the transmission casing and having an output member connected to the transmission operative mode selector, the master cylinder and the slave cylinder being placed in fluid communication through flexible conduits such that each displacement of the master cylinder piston as a result of displacement of the master cylinder input member causes a corresponding displacement of the slave cylinder piston coupled to the slave cylinder output member.
    Type: Grant
    Filed: November 28, 1983
    Date of Patent: November 22, 1988
    Inventor: Keith V. Leigh-Monstevens
  • Patent number: 4786234
    Abstract: A turbine airfoil, such as a turbine blade or nozzle vane, is disclosed for use in a high temperature environment. The airfoil comprises a center post and at least one side piece. The side piece is attached to the center post so that, at room temperature, a clearance between the center post and the side piece permits limited relative movement between the post and side piece. This clearance space, however, is dimensioned so that at the operating temperature of the turbine, thermal expansion of the center post and/or side piece substantially eliminates the clearance as well as the limited movement between the center post and side piece.
    Type: Grant
    Filed: June 21, 1982
    Date of Patent: November 22, 1988
    Assignee: Teledyne Industries, Inc.
    Inventor: Jack L. Readnour
  • Patent number: 4784037
    Abstract: A locking apparatus for fluid operated valves having a piston connected to the valve actuator which moves in response to applied pressure within a cylinder housing having a cylinder head, a catch block is secured to the piston, and the cylinder head incorporates a catch pin. Pressure applied to the cylinder to open the valve moves the piston adjacent to the cylinder head where the catch pin automatically engages the catch block preventing futher movement of the piston or premature closure of the valve. Application of pressure to the cylinder to close the valve, retracts the catch pin, allowing the valve to close. Included are one or more selector valves, for selecting pressure application to other apparatus depending on the gate valve position, open or closed, protecting such apparatus from damage due to premature closing caused by pressure loss or operational error.
    Type: Grant
    Filed: December 28, 1982
    Date of Patent: November 15, 1988
    Assignee: The United States of America as represented by the United States Department of Energy
    Inventors: Joseph Fabyan, Carl W. Williams
  • Patent number: 4783965
    Abstract: Hydraulic booster comprising a housing provided with a bore inside which there is slidably mounted two pistons each associated with a respective pressure chamber intended to be connected to a respective brake circuit; an actuating piston slidably mounted inside the bore and intended to be displaced by a brake pedal, displacement of the actuating piston being capable of causing displacement of the two pistons; and two valve mechanisms each associated with a respective brake circuit and intended to control the flow of pressurized fluid from a respective source to the brake circuit, characterized in that the two valve mechanisms are arranged parallel to the bore and are intended to be actuated simultaneously by the actuating piston.
    Type: Grant
    Filed: January 20, 1987
    Date of Patent: November 15, 1988
    Assignee: Bendix France
    Inventor: Gilbert Kervagoret
  • Patent number: 4784040
    Abstract: A control system for a pneumatic actuator uses pressurized gases, such as air, as the actuating medium. Such gases and particularly air commonly contain moisture which condenses to form a liquid, such as water, which collects in a closed chamber of an expandable chamber assembly in the pneumatic actuator. In cold climates, the water freezes, preventing proper control of the pneumatic actuator. By providing a control system having a valve positioned elevationally higher or in close proximity to a pneumatic actuator and a tube which extends into the closed chamber of the expandable chamber assembly, water which is contained in the closed chamber is expelled from the elevationally lowest portion of the assembly when the valve is shifted to exhaust the air from the control system.
    Type: Grant
    Filed: August 18, 1987
    Date of Patent: November 15, 1988
    Assignee: Caterpillar Inc.
    Inventors: Charles W. Oswald, James M. Stanley
  • Patent number: 4781026
    Abstract: A piston for acting on both a master cylinder and a fluid pressure booster is slidably disposed in a housing and defines a pressure buildup chamber communicating with a wheel brake actuating cylinder on one end and a power chamber on an opposite end. The cylinder has a plurality of axial slots defined in an outer peripheral surface thereof and communicating with inlet, supply, and outlet ports, there being seals disposed in the axial slots.
    Type: Grant
    Filed: March 4, 1987
    Date of Patent: November 1, 1988
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventor: Hiromu Kuromitsu
  • Patent number: 4781530
    Abstract: A compressor having either an axial or radial stage adjacent the air inlet includes a circumferential row of slots in the inner casing wall, the slots opening into the casing bore; a rotor having a leading row of compressor blades thereon rotatable within the bore with the tips of the blades adjacent the row of slots; and, the axial centerline of the circumferential row of slots being positioned axially forward of the axial centerline of the blades of the leading blade row with a substantial portion of the axial slot length of each slot being forward of the leading edge of the blades of the leading blade row. In a preferred form of the compressor, the inner casing wall includes a circumferential stationary ring having an inner wall for defining with the inner casing wall the bore in which the rotor rotates, the circumferential row of slots being formed in the ring wall.
    Type: Grant
    Filed: July 28, 1986
    Date of Patent: November 1, 1988
    Assignee: Cummins Engine Company, Inc.
    Inventors: Jerre F. Lauterbach, James D. Kahlenbeck, Bruce W. Turner
  • Patent number: 4781095
    Abstract: A pusher comprises a body with a plurality of piston holes provided on a front surface thereof, pistons slidably fitted to the piston holes and each having a front end extending in front of the body, an oil passage provided in the body and communicated with a bottom portion of each piston hole, a pressure chamber provided in the body and communicated with the oil passage, a threaded shaft threadably fitted to a threaded hole which is provided in the body and communicated with the pressure chamber, and oil filled in the bottom portion of each piston hole, the oil passage and the pressure chamber, where the piston is adapted to be pushed in front of the body by the threadable advancing of the threaded shaft at force larger than the advancing force of the threaded shaft.
    Type: Grant
    Filed: November 7, 1986
    Date of Patent: November 1, 1988
    Assignee: Kabushiki Kaisha Yoshida Shokai
    Inventor: Minoru Yoshida
  • Patent number: RE32814
    Abstract: A modular structure for a hydraulic cylinder permitting the cylinder to be used in combination with a reservoir of hydraulic fluid either installed on the cylinder itself or at a remote location with a conduit connection to the cylinder. The cylinder is provided with a peripherally threaded portion over which a tubular member formed integral with the reservoir, or in the alternative, provided with a connector for connection of the cylinder to a remotely located reservoir is fitted. The tubular member-fluid reservoir assembly and the tubular member-connector assembly are interchangeable.
    Type: Grant
    Filed: June 4, 1987
    Date of Patent: January 3, 1989
    Assignee: Automotive Products, plc
    Inventor: Keith V. Leigh-Monstevens
  • Patent number: RE32854
    Abstract: An improved adapter is provided for an interchangeable robot end-of-arm tooling system. The quick change adapter is made from modular components including a body, an interface package, and a robot adapter plate with locator system.
    Type: Grant
    Filed: October 20, 1987
    Date of Patent: February 7, 1989
    Assignee: EOA Systems, Inc.
    Inventors: Peter E. McCormick, Rick C. Edwards, Walter D. Autry, Jr., Timothy D. Culbertson, Jerome F. Goch, Marc S. Linder