Patents Examined by Joseph W. Roskos
  • Patent number: 5339673
    Abstract: A gas chromatograph for operation in split mode is controlled by calculating the column flow rate and the total carrier gas flow rate from the length and inner diameter of the column and specified values for temperature and column inlet pressure, adjusting the split flow rate such that the pressure value measured by a pressure sensor becomes equal to the specified pressure value and control the total carrier flow rate to be equal to the calculated value therefor. In this manner, the split ratio of the gas chromatograph can be maintained easily at a specified value. The amount of carrier gas to be wasted can be significantly reduced by appropriately varying the split ratio with time during the course of an analysis.
    Type: Grant
    Filed: March 19, 1993
    Date of Patent: August 23, 1994
    Assignee: Shimadzu Corporation
    Inventors: Kazuya Nakagawa, Satoru Miyoshi, Toyoaki Fukushima
  • Patent number: 5339677
    Abstract: A hydraulic hose impulse tester capable of simultaneously testing multiple samples of hydraulic hose in a stationary-impulse condition and in a flexing-impulse condition in the same test environment. The tester eliminates varying extraneous factors which can affect comparative test results by performing the static and dynamic tests simultaneously. Alternatively, all sample hoses can be tested in either a static or dynamic condition.
    Type: Grant
    Filed: September 9, 1993
    Date of Patent: August 23, 1994
    Assignee: HMF, Incorporated
    Inventor: Thomas J. Haug
  • Patent number: 5339676
    Abstract: A water leak detection, collection and support device comprising a tray, a grid, a collection receptacle and an indicator. The device is particularly suited to detect and collect small, previously undetectable water leaks. The device may either be permanently mounted under a sink or it may be freestanding.
    Type: Grant
    Filed: June 2, 1993
    Date of Patent: August 23, 1994
    Inventor: Del Johnson
  • Patent number: 5337597
    Abstract: The present invention is an apparatus and method for detecting a leak from an object. A bubble collecting tube is used for collecting bubbles emitted from an object and a bubble detecting assembly adjacent the bubble collecting tube is used for detecting a predetermined volume of bubbles collected in the bubble collecting tube to indicate a leak in the object.
    Type: Grant
    Filed: February 24, 1992
    Date of Patent: August 16, 1994
    Assignee: Expertek
    Inventors: Don A. Peake, Brian M. Weymouth
  • Patent number: 5337598
    Abstract: A leak test port plug device is disclosed which includes a resilient plug having a first portion which is substantially cylindrical and a second portion which is generally conical and formed in integral one-piece relationship to the first portion. When the first portion is inserted into a port of a component to be tested and the plug is compressed, the first portion radially expands in the port and the second conical portion moves into the end of the port to effectively seal the port against fluid leakage.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: August 16, 1994
    Assignee: Bimba Manufacturing Company
    Inventor: Dennis Rab
  • Patent number: 5337596
    Abstract: Apparatus for measuring permeability in rock samples comprising a measuring table (1, 41) for strapping down a rock sample (2), a nozzle (18) that can be pressed against the rock sample (2) at a set force, a gas source (23) connected to the nozzle (18), devices (24) for measuring mass flow through the nozzle and pressure in the nozzle. The apparatus comprises a rack (10,48) equipped with a pneumatic cylinder to which the nozzle is attached and where the rack and measuring table are movable in relation to each other in an X and Y direction via motors. A computer (21) that controls: (a) the motors, and thereby the movements of the nozzle and the measuring table relatively to each other so that the sample is covered by a predetermined measuring point pattern, (b) a mass flow meter (24) that controls and measures the gas flow to the nozzles, (c) a selector valve for compressed air that controls the pneumatic cylinder, and thereby the vertical movement of the nozzle.
    Type: Grant
    Filed: October 30, 1992
    Date of Patent: August 16, 1994
    Assignee: Den Norske Stats Oljeselskap A.S
    Inventors: Christian Halvorsen, Jr., Andrew R. Hurst
  • Patent number: 5337599
    Abstract: An apparatus and method for determining the thermal stability of fluids, particularly for testing the deposition characteristics of fuels, comprising a conduit system which connects in series; a test fluid reservoir having a movable piston capable of discharging the fluid, a heater section in which is mounted a heated tubular member, a time reactor of a sufficient volume to increase the residence time of the fluid therein, and a water displacement reservoir. The system also incorporates a filter located at an outlet of the heater section designed to trap deposits which may form due to the heating, and a similar filter located at an outlet of the time reactor designed to trap further deposits that may form with additional time. A differential pressure measuring device is connected across each of these filters to measure the pressure drop therethrough.
    Type: Grant
    Filed: April 6, 1992
    Date of Patent: August 16, 1994
    Assignee: Alcor, Inc.
    Inventors: Alf Hundere, George R. Wilson, III, Thomas Dowda, James Dowda, David Anderson
  • Patent number: 5337017
    Abstract: An apparatus for detecting an alcohol content of a liquid with high accuracy regardless of variance in a resonance frequency of a parallel resonance circuit constituted by inductance of a coil, capacity presented by a fluid within a liquid passage of a sensor unit and others. High-frequency voltage signals appearing at both ends of a resistor of a detector circuit connected in series to the coil are compared in respect to phase by a phase comparator, wherein difference signal resulting from the comparison is supplied to a voltage-controlled oscillator through a comparison integrator, the oscillation signal S.sub.vco of the oscillator being supplied to one end of the resistor through an amplifier. Through this phase synchronization loop, the oscillation frequency of the oscillator is forced to coincide with the resonance frequency, whereby a signal S.sub.out having a frequency bearing one-to-one correspondence to the resonance frequency is obtained from a frequency divider.
    Type: Grant
    Filed: July 26, 1993
    Date of Patent: August 9, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventor: Kenji Ogawa
  • Patent number: 5335536
    Abstract: The invention relates to a method for leak detection in roofs and interior and exterior floors covered or clad with sealing layer products and an apparatus for carrying out the method. Smoke gas is fed into and made to spread in a space between the sealing layer and the support on which the sealing layer rests. Any of the smoke gas penetrating in an outward direction through holes in the sealing layer is detected when it escapes from the holes on the outer side of the roof cover, whereby their locations can be determined. The apparatus for carrying out the method according to the invention comprises a device for generation of smoke gas, transport elements to move the smoke gas to the space where the smoke gas is made to spread, and a generator that creates an air flow for transport of the smoke gas.
    Type: Grant
    Filed: January 29, 1993
    Date of Patent: August 9, 1994
    Assignee: AB Mataki
    Inventor: Lars Runnevik
  • Patent number: 5333491
    Abstract: A method and test chamber for leak testing a container with a substantially flexible wall portion wherein the container is introduced into a test cavity so that the wall portion of the container is spaced from an inner adjacent wall portion of the test cavity with a gap being defined between the wall portion of the cavity and the flexible wall portion of the container. A pressure difference is installed as an initial value between the interior of the container and at least the gap by applying a pressure at least to the gap which is smaller than a pressure inside the container. The flexible wall portion is supported form its exterior side within the test cavity so as to prevent the flexible wall portion from bending outwardly into contact with the wall portion of the test cavity as a result of the pressure difference. The time course of a pressure prevailing within the gap is measured as a leak indicative signal.
    Type: Grant
    Filed: February 10, 1993
    Date of Patent: August 2, 1994
    Inventor: Martin Lehmann
  • Patent number: 5331845
    Abstract: A probe for measuring the concentration of an alcohol, such as ethanol, in a liquid, such as water. The probe according to the invention has a membrane that is permeable for vapors of the alcohol but substantially impermeable for the liquid; a measuring chamber having an open end closed against the liquid by the membrane is provided and has an inlet and an outlet; a pump or other pressure means serves to feed a purge gas, such as air, via the inlet into and out of the measuring chamber; a valve is provided near the inlet for controlled passage of the purge gas through the chamber; a suitably dimensioned detector including a pellistor or a gas-sensitive resistor is arranged in the measuring chamber for quantitative detection of the alcohol and for generating an electrical signal in proportion with the detection.
    Type: Grant
    Filed: January 19, 1993
    Date of Patent: July 26, 1994
    Assignee: Orbishpere Laboratories Neuchatel SA
    Inventors: Ion Bals, John M. Hale, Eugen Weber, Antoine Gagnebin, Gerard R. Stehle
  • Patent number: 5329806
    Abstract: Disclosed is an exhaust oxygen sensor including a component requiring electricity to operate such as a heater or oxygen electrode. The first electrical terminal is provided in electrical contact with the component and wherein the electrical terminal has at least one male prong. The second electrical terminal in electrical contact with a wire for delivering electrical power from an external source is also provided. The second electrical terminal has at least one female connector or receptacle. The male prong and the female connector are constructed and arranged so at least one of the first and second electrical terminals is removable with respect to the other terminal. The sensor may include a threaded nut slidably received over a tubular housing, constructed and arranged to be threaded onto a threaded exhaust manifold boss without rotating the housing.
    Type: Grant
    Filed: May 11, 1993
    Date of Patent: July 19, 1994
    Assignee: General Motors Corporation
    Inventors: Mark R. McClanahan, Bruce R. Dinger, Richard W. Duce
  • Patent number: 5329807
    Abstract: This invention relates to a centrifugal apparatus for testing the waterproofness of an article of footwear. The centrifugal apparatus may also be used to test other apparel such as gloves, socks, waders, pants, and hats.
    Type: Grant
    Filed: June 18, 1993
    Date of Patent: July 19, 1994
    Assignee: W. L. Gore & Associates, Inc.
    Inventors: Thomas G. Sugar, Seshamamba Yalamanchili
  • Patent number: 5327776
    Abstract: A leakage detecting device for an evaporated fuel gas system of an automobile draws and maintains a partial vacuum in the air space above the fuel in a tank 1 by temporarily connecting the space to the negatively pressurized intake manifold 5. An oxygen sensor 21 thereafter monitors the oxygen level in the evacuated space for a predetermined period of time, and if the oxygen increase exceeds a predetermined normal increase, a leakage alarm is given.
    Type: Grant
    Filed: May 26, 1993
    Date of Patent: July 12, 1994
    Assignee: Mitsubishi Denki Kabushiki Kaisha
    Inventors: Katsuaki Yasui, Akira Yamashita
  • Patent number: 5327775
    Abstract: A condom tester and applicator comprises a hollow cylinder (10) having an open proximal end (12) and a distal end (14). The hollow cylinder is constructed of a transparent material, such as clear plastic. The distal end of the cylinder possesses an end-face (16) which contains a one-way valve (18). The inner surface of the hollow cylinder accommodates a plurality of longitudinal grooves (22). A mounting flange (24) is formed at the periphery of the proximal end of the hollow cylinder. A condom is tested by sealingly installing it into the hollow cylinder and creating a pressure differential across the condom membrane by forcing out the air inside the cylinder through the one-way valve and thus distending the condom. The condom is donned onto a penis by inserting the penis inside the hollow cylinder with the condom inflatably installed therein, and transferring the hem ring of the condom from the mounting flange onto the base of the penis.
    Type: Grant
    Filed: October 27, 1992
    Date of Patent: July 12, 1994
    Assignee: Yakov Epshteyn
    Inventor: Yefim Epshetsky
  • Patent number: 5325706
    Abstract: A fuel dispensing apparatus includes a fuel reservoir having a pump to pump fuel from the reservoir into a first leg of piping. A master dispenser downstream of the first leg of piping has an outlet hose, a user-controllable switch activatable to turn on the pump to pump motor fuel from the reservoir to the master dispenser, a meter to detect the flow of motor fuel being dispensed through the master dispenser, and a second leg of piping downstream of the meter and exiting the master dispenser. A satellite dispenser is connected to second leg. An electronic means simulates the activation of the switch by turning on the pump and determines the meter's detection of the flow of motor fuel during a time of simulated activation of the switch and outputs a leak detection signal when such flow is detected.
    Type: Grant
    Filed: July 21, 1992
    Date of Patent: July 5, 1994
    Assignee: Gilbarco, Inc.
    Inventor: John S. Grose
  • Patent number: 5323635
    Abstract: An air fuel ratio detecting arrangement using a diffusion suppressing type air fuel ratio sensor applicable to an air fuel ratio control unit for an internal combustion engine incorporating an atmospheric air pressure correction circuit in a signal processing and outputting device for correcting an output voltage signal processed therein based on a change in atmospheric air pressure which is detected when a predetermined operating condition of an internal combustion engine is satisfied. A secular change correction circuit included in the signal processing and outputting device detects a change in electromotive force of a concentration cell portion of the air fuel ratio sensor when a predetermined rich air fuel ratio is reached and corrects a reference voltage for the air fuel ratio sensor based on the detected change in electromotive force of the concentration cell portion in addition to an air calibration circuit.
    Type: Grant
    Filed: May 28, 1993
    Date of Patent: June 28, 1994
    Assignees: Hitachi, Ltd., Hitachi Automotive Engineering Co., Ltd.
    Inventors: Sadayasu Ueno, Takao Sasayama, Seiko Suzuki, Kanemasa Sato, Shiro Ouchi, Naoki Minami, Norio Hasegawa
  • Patent number: 5323640
    Abstract: A method and apparatus for the testing of vehicle fuel tank caps includes the mounting of a cap to be tested upon a mating socket. The socket/cap combination define a sealed chamber which can be pressurized and/or evacuated in a controlled manner. A pressure transducer monitors the pressure within the chamber. The monitored pressure is compared to reference values to determine cap integrity. The apparatus may be incorporated into a vehicle testing system using microprocessor control and having a database of vehicle, cap and performance data.
    Type: Grant
    Filed: May 10, 1993
    Date of Patent: June 28, 1994
    Assignee: Environmental Systems Products, Inc.
    Inventors: Vincent J. Porcaro, Rinaldo Tedeschi, Paul Greco
  • Patent number: 5323642
    Abstract: Non-invasive, portable, modular testing apparatus for non-invasively testing timepieces for fluid integrity without damaging or dismantling the timepiece and without interrupting the timekeeping function or operation thereof, including a transparent tubular container member capable of providing a high pressure, fluid sealed environment for the timepiece, the container member being open at one end and provided with an enlarged, integral rim portion, the opposite integral end of the tubular container member including an enlarged integral rim portion equal in diameter to the rim portion of the open end providing a rigid, non rockable base for the container, a circular, rigid, transparent closure member for the container securing the closure member to the tubular container member, and a pressure applicator integral with the tubular container member, for automatically pressurizing the internal volume of the tubular container member.
    Type: Grant
    Filed: January 26, 1993
    Date of Patent: June 28, 1994
    Inventors: Todd Condon, David Fang
  • Patent number: 5323636
    Abstract: A dual channel flexural device is fabricated on a gallium arsenide (GaAs) bstrate that includes a pair of elongated active vibrating (GaAs) bars formed in the substrate that serve as acoustic waveguides. One of the bars serves as a reference channel, while the other bar is covered with a chemically sensitive coating and operates as a sensing channel. A pair of pseudo-surface acoustic wave (SAW) transducers serving as input and output transducers are located at each end of the bars. Each of the transducers is comprised of discontinuous U-shaped elements having dimensions and mutual separations of one half the acoustic operating wavelength formed on one side of the substrate while ground electrodes are formed thereunder on the opposite side of the substrate. When the transducers are energized, a flexural motion in the bars is set up, causing the bars to vibrate.
    Type: Grant
    Filed: June 11, 1993
    Date of Patent: June 28, 1994
    Assignee: The United States of America as represented by the Secretary of the Army
    Inventors: Raymond C. McGowan, Elio A. Mariani