Fluid Pressure Brake System Or Unit Patents (Class 73/39)
  • Publication number: 20140076031
    Abstract: An apparatus in one example comprises an airflow manipulating device, a portable control device, and an air pressure sensor. The airflow manipulating device is disposed between a source of compressed air and an air brake line of a train consist. The portable control device is in wireless communication with the airflow manipulating device. The portable control device is transportable by a user along the train consist during inspection of the air brake line. The portable control device is adapted to transmit a control signal over a wireless communication channel to move a valve in the airflow manipulating device to a position that causes an increase or decrease of air pressure in the air brake line. The air pressure sensor measures an air pressure level in the air brake line for wireless transmission to the portable control device.
    Type: Application
    Filed: November 22, 2013
    Publication date: March 20, 2014
    Applicant: Fugiel Railroad Supply Corp.
    Inventors: Robert V. Fugiel, Robert C. Fletcher, SR., Robert C. Fletcher, JR.
  • Patent number: 8631662
    Abstract: A pressure and prevacuum testing system for an AC system in a vehicle includes an air pressure source for pressurizing a cooling circuit of the AC system to a predetermined high pressure threshold and a vacuum source for prevacuuming the cooling circuit either to a predetermined prevacuum low pressure level or for a predetermined time period. The system also includes a pressure gauge for operatively measuring a pressure level in the cooling circuit. A controller is operatively connected to the air pressure source, the vacuum source and the pressure gauge. The controller compares the pressure level as measured by the pressure gauge to the predetermined high pressure threshold during a pressurized test of the cooling circuit and to the predetermined prevacuum low pressure level during a prevacuum test of the cooling circuit to determine if leaks are present in the cooling circuit.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: January 21, 2014
    Assignee: Honda Motor Co., Ltd.
    Inventors: Terry Castle, Tiffany Kasettratut, Richard McDonald, Charles Hudgins, Kevin Lilly
  • Publication number: 20130192345
    Abstract: A device for carrying out a test on a fluid circuit of an aircraft including a test unit which includes, at the inlet, at least one means of connection to a pressurized gas supply connected to means for regulating the pressure of the gas provided by the supply as a function of the test to be carried out and, at the outlet, at least two connection means connected to the means for regulating the pressure of the gas, wherein at least two connection means have different dimensions tailored to a range of pressures or a given pressure.
    Type: Application
    Filed: March 13, 2013
    Publication date: August 1, 2013
    Applicant: AIRBUS OPERATIONS SAS
    Inventor: Airbus Operations SAS
  • Publication number: 20130174647
    Abstract: A test bench for testing a brake comprises a pressure generating assembly for providing a brake fluid with an increased hydraulic pressure, a test bench control, and an electromechanical brake actuator. The pressure generating assembly is actuated mechanically and the brake fluid is supplied to the brake to actuate the brake. The electromechanical brake actuator, which simulates a vehicle driver's braking foot, is provided for mechanical actuation of the pressure generating assembly. The brake actuator comprises an electric motor activated by the test bench control and a planetary roller screw drive driven by the electric motor. The planetary roller screw drive is mechanically coupled to the pressure generating assembly to mechanically actuate the pressure generating assembly.
    Type: Application
    Filed: December 18, 2012
    Publication date: July 11, 2013
    Applicant: HORIBA EUROPE GMBH
    Inventor: Horiba Europe GmbH
  • Patent number: 8459464
    Abstract: Apparatuses and methods are described for the discrimination of particles using sedimentation field-flow fractionation operating without the use of rotating seals. Multiple lines of fluid and electrical communication are provided through a centrifugation unit comprising a fishhook-shaped umbilical conduit traveling from a stationary frame through a rotating guide frame to the separation channel. Twisting and tangling of the umbilical conduit enclosed communication lines are prevented by rotating the guide frame and separation channel in the same direction about an axis at an angular velocity ratio of 1:2. The design eliminates maintenance problems associated with rotating seals, simplifies channel installation and adjustment, and enables the use of multiple channels and the simultaneous application of multiple modes of field-flow fractionation either in concert or in a two-dimensional format.
    Type: Grant
    Filed: March 18, 2011
    Date of Patent: June 11, 2013
    Inventor: Fred C. Senftleber
  • Publication number: 20130047705
    Abstract: A system for testing a rail car brake system includes a valve manifold having valves that selectively supply and vent test air to or from the brake system. A control circuit is operatively connected with the valve manifold and configured to operate in a first mode to automatically position the valves according to a prescribed test and to operate in a second mode to allow manual positioning of the valves. A method for testing a rail car brake system includes connecting test air to a valve manifold, connecting the valve manifold to the brake system, and testing the brake system using a control circuit configured to automatically position valves in the valve manifold according to a prescribed test. The method further detects a failed test result in the brake system and troubleshoots the brake system using the control circuit to manually position valves in the valve manifold.
    Type: Application
    Filed: August 29, 2011
    Publication date: February 28, 2013
    Applicant: GRAHAM-WHITE MANUFACTURING COMPANY
    Inventors: Cole Frantz Semones, Michael Grissom
  • Patent number: 8216849
    Abstract: A method and kit for determining a concentration of iron in brake fluid when contacting a colorimetric reagent such that a color results. The level of iron can be used to determine the amount of active corrosion within a brake system and determine if special service procedures are required.
    Type: Grant
    Filed: September 19, 2011
    Date of Patent: July 10, 2012
    Inventor: Jon A. Petty
  • Patent number: 8140237
    Abstract: A method and system for determining a brake pressure which is predefined by a vehicle control system involve effecting a vehicle braking process initiated by an electronic braking system and/or the vehicle driver, determining a vehicle deceleration a, and a brake pressure pestim, comparing the brake pressure pestim against a reference pressure pB, terminating the braking process triggered by the electronic braking system when pestim is less than the reference pressure pB, or continuing the braking process triggered by the electronic braking system when pestim is greater than or equal to the reference pressure pB.
    Type: Grant
    Filed: April 22, 2009
    Date of Patent: March 20, 2012
    Assignee: WABCO GmbH
    Inventors: Rainer J├Âllerichs, Thomas Lenz
  • Publication number: 20120047998
    Abstract: The present invention relates to a pressure sensor employed in a stability control apparatus for a vehicle. According to an aspect, there is provided a pressure sensor installed to a hydraulic unit and being in contact with a circuit board of an electronic control unit to sense brake oil pressure. The pressure sensor comprises a connecting terminal formed on the circuit board of the electronic control board and comprising a press-fit terminal; a press-fit being in slidable and movable contact with the press-fit terminal; and a spring connecting the press-fit and the press-fit terminal.
    Type: Application
    Filed: November 8, 2011
    Publication date: March 1, 2012
    Applicant: Mando Corporation
    Inventor: Chae Soo KIM
  • Publication number: 20110239741
    Abstract: A device (1) and a method are provided for determining the oscillatory behavior of a brake lining (3) for a motor vehicle. The device (1) has a mounting device (2) for mounting a brake lining (3) and a securing device (6) for securing a brake disk model (7) assigned to the brake lining (3) so that the brake lining (3) can be brought to bear with the brake disk model (7) against a contact face (8). A pretensioning device (9) is coupled to the mounting device (2) and/or to the securing device (6) so that the brake lining (3) can be pressed against the brake disk model (7) with a pressure force (10, 10?) predetermined in terms of absolute value and direction. An excitation device (13, 13?) is provided for exciting oscillations of the brake disk model (7) and/or the brake lining (3).
    Type: Application
    Filed: April 6, 2011
    Publication date: October 6, 2011
    Applicant: DR. ING. H.C.F. PORSCHE AKTIENGESELLSCHAFT
    Inventors: Claus Thomas, Matthias Leber, Ingolf Eichmann
  • Publication number: 20110232370
    Abstract: A test port adapter plate is used with an electropneumatic overlay access plate, which is incorporated to the single-sided pipe bracket in an overlay system, to provide enough space for a test connector to be connected.
    Type: Application
    Filed: March 29, 2011
    Publication date: September 29, 2011
    Applicant: NEW YORK AIR BRAKE CORPORATION
    Inventors: Jeffrey F. SAUTER, Dan ROWLAND
  • Patent number: 8021890
    Abstract: A method and kit for determining a concentration of iron in brake fluid when contacting a calorimetric reagent such that a color results. The level of iron can be used to determine the amount of active corrosion within a brake system and determine if special service procedures are required.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: September 20, 2011
    Inventor: Jon A. Petty
  • Publication number: 20110179853
    Abstract: An apparatus in one example comprises an airflow manipulating device, a portable control device, and an air pressure sensor. The airflow manipulating device is disposed between a source of compressed air and an air brake line of a train consist. The portable control device is in wireless communication with the airflow manipulating device. The portable control device is transportable by a user along the train consist during inspection of the air brake line. The portable control device is adapted to transmit a control signal over a wireless communication channel to move a valve in the airflow manipulating device to a position that causes an increase or decrease of air pressure in the air brake line. The air pressure sensor measures an air pressure level in the air brake line for wireless transmission to the portable control device.
    Type: Application
    Filed: March 31, 2011
    Publication date: July 28, 2011
    Inventors: Robert V. Fugiel, Robert C. Fletcher, SR., Robert C. Fletcher, JR.
  • Publication number: 20110112774
    Abstract: A method for determining a lack of capacity of a pump, actuated by an electric motor, of a hydraulic brake system of a motor vehicle comprises the steps of generating a hydraulic pressure in a first brake circuit of the brake system by means of a plurality of pump elements of the pump that are assigned to the first brake circuit, limiting the generated hydraulic pressure to a test pressure and simultaneously acquiring a motor-related parameter, and determining a lack of capacity of at least one of the pump elements on the basis of a comparison of the parameter with a comparison value.
    Type: Application
    Filed: February 19, 2009
    Publication date: May 12, 2011
    Inventor: Leo Gilles
  • Patent number: 7682834
    Abstract: A method for determining a type of brake fluid that includes contacting a colorimetric reagent on a substrate. An embodiment of the method reacts to the presence of a borate ester in brake fluid to produce a color contacted by DOT 4/5.1 brake fluid or a second color in the presence of pure DOT 3 fluid. In the event of mixtures of DOT 3 with DOT 4/5.1, a third color results when contacted by a mixture of DOT 3 and DOT 4/5.1 brake fluid in which the DOT 4/5.1 fluid is about 50% or less of the mixture.
    Type: Grant
    Filed: November 3, 2008
    Date of Patent: March 23, 2010
    Inventor: Jon A. Petty
  • Patent number: 7647816
    Abstract: A single car test device includes a housing; a source port, on the housing, to be connected to a source of pressurized air; a brake pipe port, on the housing, to be connected to the brake pipe connector; and valves, in the housing, selectively interconnecting the ports to each other and atmosphere to perform tests. A brake cylinder sensor is to be connected to a brake cylinder tap. A sensor module on an interface device, remote from the housing, is to be mounted on the test ports on a control valve for determining pressure at the test ports. A controller is connected to the valves, the sensor module and the brake cylinder sensor and includes a program performing a plurality of component tests which form a single car test. The interface device includes reservoir charging valves controlled by the controller.
    Type: Grant
    Filed: May 9, 2007
    Date of Patent: January 19, 2010
    Assignee: New York Air Brake Corporation
    Inventor: Lawrence E Vaughn
  • Publication number: 20090211339
    Abstract: A single car test device includes a housing; a source port, on the housing, to be connected to a source of pressurized air; a brake pipe port, on the housing, to be connected to the brake pipe connector; and valves, in the housing, selectively interconnecting the ports to each other and atmosphere to perform tests. A brake cylinder sensor is to be connected to a brake cylinder tap. A sensor module on an interface device, remote from the housing, is to be mounted on the test ports on a control valve for determining pressure at the test ports. A controller is connected to the valves, the sensor module and the brake cylinder sensor and includes a program performing a plurality of component tests which form a single car test. The interface device includes reservoir charging valves controlled by the controller.
    Type: Application
    Filed: May 5, 2009
    Publication date: August 27, 2009
    Applicant: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Publication number: 20090071147
    Abstract: A control system for evaluating a brake booster system includes an engine evaluation module that detects an engine off condition. A pressure evaluation module, during the engine off condition, monitors hydraulic brake line pressure, detects a change in brake booster pressure, and determines a brake booster vacuum decay rate based on the change in brake booster pressure. A fault reporting module detects a brake booster system fault based on the brake line pressure and the brake booster vacuum decay rate.
    Type: Application
    Filed: January 14, 2008
    Publication date: March 19, 2009
    Applicant: GM GLOBAL TECHNOLOGY OPERATIONS, INC.
    Inventors: Zhong Wang, Tony T. Hoang, Daryl A. Wilson, Margaret C. Richards, Lan Wang
  • Publication number: 20080276691
    Abstract: A single car test device includes a housing; a source port, on the housing, to be connected to a source of pressurized air; a brake pipe port, on the housing, to be connected to the brake pipe connector; and valves, in the housing, selectively interconnecting the ports to each other and atmosphere to perform tests. A brake cylinder sensor is to be connected to a brake cylinder tap. A sensor module on an interface device, remote from the housing, is to be mounted on the test ports on a control valve for determining pressure at the test ports. A controller is connected to the valves, the sensor module and the brake cylinder sensor and includes a program performing a plurality of component tests which form a single car test. The interface device includes reservoir charging valves controlled by the controller.
    Type: Application
    Filed: May 9, 2007
    Publication date: November 13, 2008
    Applicant: NEW YORK AIR BRAKE CORPORATION
    Inventor: Lawrence E. Vaughn
  • Patent number: 7174778
    Abstract: Control device for a motor vehicle, particularly for controlling a gearbox, with an electronic control circuit arranged on a support plate in a housing; for measurement of the hydraulic pressure, a measuring transducer is connected to a hydraulic unit of the gearbox by a pressure channel, wherein a spring element is formed in a region of the support plate and is a portion of the measuring transducer; the spring element is connected for force transmission via a connecting member to a diaphragm which sealingly spans the aperture of the pressure channel leading to the spring element.
    Type: Grant
    Filed: November 24, 2004
    Date of Patent: February 13, 2007
    Assignee: Siemens AG Austria
    Inventors: Leopold Hellinger, Gerhard Neumann
  • Patent number: 6971724
    Abstract: A method and apparatus for simulating a failure in a heavy vehicle air brake system where a failure initiation switch is connected to a failed system selector switch and both switches are connected to a first valve associated with a primary braking system and a second valve associated with a secondary braking system of a vehicle. The failure initiation switch and the failed system selector switch are used to selectively interrupt a braking signal to either said primary braking system or said secondary braking system.
    Type: Grant
    Filed: October 12, 2004
    Date of Patent: December 6, 2005
    Assignee: Dana Corporation
    Inventor: William A. Maresko
  • Patent number: 6901789
    Abstract: A method for determining parameters for the viscosity or temperature of a brake fluid of a vehicle by way of a predetermined pressure build-up within time limits in at least one defined section of a brake circuit and for detecting a pressure in the said section and/or a time which is required for the build-up of the said pressure.
    Type: Grant
    Filed: March 16, 2000
    Date of Patent: June 7, 2005
    Assignee: Continental Teves AG & Co. oHG
    Inventors: Helmut Fennel, Christine Latarnik, legal representative, Eva-Maria Latarnik, legal representative, Syllva Latarnik, legal representative, Michael Latarnik, deceased
  • Patent number: 6837550
    Abstract: A method for diagnosing a braking system using a system including a radio-based hand-held analyzer, at least one radio-based feed valve, and at least one mobile data unit. The braking system includes at least one brake pipe section, a reservoir, and at least one brake cylinder. The brake pipe section connects to the reservoir, the brake cylinder, and the radio-based feed valve. The hand-held radio-based analyzer communicates with the mobile data unit and the radio-based feed valve. The method includes retrieving brake system data and information using the hand-held analyzer, interpreting the retrieved data and information, and performing maintenance functions based on the interpretation of the data and information.
    Type: Grant
    Filed: December 28, 2001
    Date of Patent: January 4, 2005
    Assignee: GE Harris Railway Electronics, LLC
    Inventors: Bryan Alvin Dougherty, Donnie Horace Herndon
  • Patent number: 6766681
    Abstract: A malfunction detection device of a bellows type accumulator for pressurized fluid includes malfunction judgment unit for judging a malfunction of the bellows type accumulator on the basis of a detection output of the pressure sensor. The malfunction judgement unit judges that the malfunction of the seal member generates when the difference between a peak pressure value appeared before a predetermined time is past after the starting of the pressure increase from a value below a predetermined value in the inlet and outlet port and a stable fluid pressure appeared after the appearance of the peak pressure value is not within a predetermined range and/or when the peak pressure value does not appear before the progress of the predetermined time.
    Type: Grant
    Filed: April 9, 2002
    Date of Patent: July 27, 2004
    Assignee: Aisin Seiki Kabushiki Kaisha
    Inventors: Kenichi Suzuki, Tetsuya Sato, Tadao Saito, Takashi Kurokawa, Yasunori Sakata
  • Patent number: 6530261
    Abstract: A relatively simple and inexpensive apparatus for testing at least the air brakes of trailers includes a portable air-brake governing or actuation system and a hand-held control pendent, operating off an independent compressed air supply. Without the coupling of, and connections with, a tractor, the air brakes of a trailer can be applied and released, and held in a charged mode for a period of time during which any loss of air pressure can be monitored. Using the apparatus a single person can conduct the entire air brake test process, including applying and releasing the brakes while simultaneously visually and manually inspecting the brakes.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: March 11, 2003
    Inventor: James F. Foster
  • Patent number: 6446490
    Abstract: Device and method for determining a wheel braking pressure and/or an admission pressure in a braking system in which pressure medium is introduced from a reservoir for the pressure medium having an admission pressure into a wheel brake through at least one shutoff device for inlet and/or outlet and/or passage of a pressure medium, it being possible to remove pressure medium from the wheel brake through at least one means delivering the pressure medium. In so doing, a pressure quantity representing the admission pressure is estimated, at least one operating state of at least one actuator in the braking system is detected and the wheel braking pressure is estimated as a function of the estimated admission pressure and the detected operating states.
    Type: Grant
    Filed: December 13, 2000
    Date of Patent: September 10, 2002
    Assignee: Robert Bosch GmbH
    Inventors: Herbert Lohner, Peter Dominke, Chi-Thuan Cao, Karl-Josef Weiss, Helmut Wiss, Andreas Zierhut, Jens Fiedler
  • Patent number: 6425282
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: July 30, 2002
    Assignee: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Patent number: 6374193
    Abstract: In a method for monitoring the functioning of a compressor, which charges a gas-filled accumulator chamber with a working pressure, the actual pressure prevailing in the accumulator chamber is measured and compared to a setpoint pressure. In response to a deviation in the actual pressure from the setpoint pressure, an error signal is produced. The comparison of the actual pressure and the setpoint pressure is carried out during the charging operation when the accumulator chamber is charged.
    Type: Grant
    Filed: January 19, 1999
    Date of Patent: April 16, 2002
    Assignee: DaimlerChrysler AG
    Inventors: Eberhard Kutscher, Joachim Lang, Gerhard Lohrmann, Reiner Schneider, Udo Walter
  • Patent number: 6334354
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: January 1, 2002
    Assignee: New York Air Brake Corporation
    Inventors: Lawrence E. Vaughn, Donald Crews
  • Patent number: 6327894
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Grant
    Filed: April 10, 2001
    Date of Patent: December 11, 2001
    Assignee: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Publication number: 20010039826
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Application
    Filed: April 10, 2001
    Publication date: November 15, 2001
    Applicant: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Publication number: 20010039827
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Application
    Filed: April 10, 2001
    Publication date: November 15, 2001
    Applicant: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Publication number: 20010011476
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Application
    Filed: April 10, 2001
    Publication date: August 9, 2001
    Applicant: New York Air Brake Corporation
    Inventors: Lawrence E. Vaughn, Donald Crews
  • Patent number: 6269682
    Abstract: A single car tester including a housing having a hanger to mount the housing to a car coupler or ladder of the car. Various configurations of valves and sensors are described to perform a single car test. The controller includes a program for uniquely performing the required tests.
    Type: Grant
    Filed: June 3, 1999
    Date of Patent: August 7, 2001
    Assignee: New York Air Brake Corporation
    Inventor: Lawrence E. Vaughn
  • Patent number: 6227625
    Abstract: A portable device permits testing of an EOT unit of a two-way end-of-train (EOT) radio telemetry system. During the test, the EOT unit may be mounted to and fully installed on the railcar on which it is to be used. The portable device includes a microprocessor unit, a display, and a transceiver that enables the invention to communicate with the EOT unit. The portable device also includes a mechanism for authorizing the portable device to communicate with the EOT unit. Used to control the overall operation of the portable device, the microprocessor unit operates the transceiver in cooperation with the aforementioned mechanism so as to authorize the portable device to communicate with the EOT unit according to an arming procedure. The microprocessor unit also operates the display on which the progress and completion of the arming procedure is indicated.
    Type: Grant
    Filed: August 24, 1999
    Date of Patent: May 8, 2001
    Assignee: Westinghouse Air Brake Company
    Inventor: Edward W. Gaughan
  • Patent number: 6081767
    Abstract: The invention provides a method for determining the amount of undissolved gas present in a hydraulic system by supplying hydraulic medium thereto under overpressure, one of the parameters Pressure (P) and Volume (V) being set during this supply and the course of the variation of the other parameter (Volume (V) or Pressure (P)), which is dependent thereon and on the amount of undissolved gas, being recorded; the detection results are then compared with those which were calculated and/or are known for a reference system which corresponds to the system and is subjected to the same treatment when the hydraulic medium present therein contains no dissolved gas or a known amount of dissolved gas; from this comparison results an indication of the amount of undissolved gas, and also of its location, in the system.
    Type: Grant
    Filed: September 12, 1997
    Date of Patent: June 27, 2000
    Assignee: Sun Electric Systems B.V.
    Inventors: Klaus Leonard Witt, Roland Ludovicus Adrianus Vossen
  • Patent number: 5936154
    Abstract: An apparatus for operator controlled purging of the tanks of a pressurized air reservoir of a vehicle air system comprises an air actuated normally closed drain valve mounted to an underside of each tank, a source of pressurized air engaged to each drain valve, and a controller for each valve engaged downstream of the source, and within a driver area of the vehicle, the controller when activated, allowing for communication between the source and the drain valve for opening of the valve. The method for using the apparatus in testing air system integrity includes the steps of draining and refilling each tank individually in a pre-defined sequence while monitoring driver area mounted indicators of air pressure levels and testing functionality of an air system operated service brake system of the vehicle by carrying out the pre-defined sequence.
    Type: Grant
    Filed: August 26, 1997
    Date of Patent: August 10, 1999
    Assignee: Navistar International Transportation Corp.
    Inventors: Robert H. Neely, Jr., Lawrence H. Kuhn
  • Patent number: 5936153
    Abstract: An apparatus for testing tread and disk brake actuator units for use in railway cars in an overhaul backshop environment is disclosed. The apparatus includes a test bench on which multiple test fixtures are mounted to simultaneously receive and test a like number of brake actuator units. Each test fixture is provided with differently sized sets of brackets to enable respective simultaneous mounting of different brake actuator units made by a variety of manufacturers. The test bench includes a series of solenoids and directional valves operated by a programmable logic controller to supply low, high and maximum pressure air to the actuator units to perform pneumatic leakage, applied force, and slack adjuster travel tests. Pneumatic leakage detection is performed through an automatic test removing human subjectivity from the test process. A diagnostics panel provides functional information on the status of the equipment on the test bench.
    Type: Grant
    Filed: June 30, 1997
    Date of Patent: August 10, 1999
    Assignee: National Railroad Passenger Corporation
    Inventors: Adam Steckler, Charlie Pope, Norris Macklin, John J. Hannaford
  • Patent number: 5908983
    Abstract: For the detection of undissolved gas in the brake system; hydraulic pressure is built up and at least one characteristic value for the pressure buildup such as the master cylinder pressure, the brake pedal distance, the drop in storage chamber pressure, etc., is checked to see if it exceeds a predetermined limit value. If this limit value is exceeded, it is assumed that there is an unacceptable amount of undissolved gas in the hydraulic component of the brake system.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: June 1, 1999
    Assignee: Robert Bosch GmbH
    Inventor: Juergen Binder
  • Patent number: 5898102
    Abstract: A brake pipe leakage test for a train is performed using an improved brake pipe drop pressure method prior to departure of the train consist from a railyard terminal. The train consist includes a brake, a brake pipe, and a brake pipe cutoff valve.
    Type: Grant
    Filed: August 21, 1997
    Date of Patent: April 27, 1999
    Assignee: Westinghouse Air Brake Company
    Inventor: Elmer T. Skantar
  • Patent number: 5866811
    Abstract: An automated terminal test system performs a terminal test of brake equipment on a train. The system includes a test control box connected to a head of train locomotive and accessible from outside of such locomotive. Linked to such brake equipment, the test control box has a control for activating the test control box, applying and releasing the brakes, and charging and venting such brake pipe. The system also includes an end of train transceiver device connected to such brake pipe on a last railcar of such train. The end of train transceiver device monitors pressure within such brake pipe on such last railcar, senses movement of such last railcar, and communicates signals representative of such pressure monitored and such movement sensed. The system further includes a head of train transceiver device linked to such brake equipment and connected to such brake pipe on such locomotive.
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: February 2, 1999
    Assignee: Westinghouse Air Brake Co.
    Inventor: Elmer T. Skantar
  • Patent number: 5808909
    Abstract: An automatic, computer controlled air brake testing system having an opening and closing means for opening and closing air passages of a railroad car brake system, a pressure measuring means for determining pressure in the car brake system, a flow measuring means for measuring the air flow rate in the brake system, and controller means for controlling the flow measuring means and the opening and closing means.
    Type: Grant
    Filed: September 15, 1995
    Date of Patent: September 15, 1998
    Inventor: James G. Rees
  • Patent number: 5767397
    Abstract: In at least one operating situation, especially while the vehicle is stopped, pressure is built up in a defined manner and then released for test purposes without waiting for a steady state value to be reached. On the basis of the pressure-time or force-time curve in at least one wheel brake, a determination is made on whether or not an unacceptable amount of undissolved gas is present in the brake system.
    Type: Grant
    Filed: November 15, 1996
    Date of Patent: June 16, 1998
    Assignee: Robert Bosch GmbH
    Inventor: Uwe Eisele
  • Patent number: 5767389
    Abstract: A method and apparatus for testing and filling hydraulic assemblies such as a hydraulic clutch control assembly for a motor vehicle.
    Type: Grant
    Filed: July 26, 1995
    Date of Patent: June 16, 1998
    Assignee: Automotive Products (USA), Inc.
    Inventor: Robert Henry LaFountain
  • Patent number: 5747685
    Abstract: An automated terminal test system for performing a terminal test of brake equipment on a train includes a test control box connected to a head of train locomotive and accessible from outside of such locomotive. Linked to such brake equipment, the test control box has a control for activating the test control box, applying and releasing the brakes, and charging and venting such brake pipe. The system also includes an end of train transceiver device connected to such brake pipe on a last railcar of such train. The end of train transceiver device monitors pressure within such brake pipe on such last railcar, senses movement of such last railcar, and communicates signals representative of such pressure monitored and such movement sensed. The system further includes a head of train transceiver device linked to such brake equipment and connected to such brake pipe on such locomotive.
    Type: Grant
    Filed: July 20, 1995
    Date of Patent: May 5, 1998
    Assignee: Westinghouse Air Brake Company
    Inventor: Elmer T. Skantar
  • Patent number: 5714684
    Abstract: For use with control valves having test ports via which various pressures may be accessed in performing an automatic single car brake test, there is provided a test plate via which such control valves may be conditioned to obtain faster charging of the brake equipment when performing the brake test with a manual single car tester. The test plate interconnects the test ports such that the test pressure supplied to the car brake pipe charges the brake equipment in by-pass of the charging choke in the control valve.
    Type: Grant
    Filed: March 25, 1996
    Date of Patent: February 3, 1998
    Assignee: Westinghouse Air Brake Co.
    Inventor: Edward W. Gaughan
  • Patent number: 5709436
    Abstract: A pneumatic receptacle adapted to receive a pneumatic connector head of a test device is mounted in a universal location remote from the brake control valve of a railroad freight car. The remotely mounted receptacle may be located on the railroad car body, for example, and is communicated with access ports associated with the control valve via hoses or conduits. In locating the receptacle on the car body, hook-up of the test device can be accomplished conveniently and in a safe manner by railroad personnel in the course of conducting a single car test to check the condition of the car brakes, regardless of the control valve location.
    Type: Grant
    Filed: December 17, 1996
    Date of Patent: January 20, 1998
    Assignee: Westinghouse Air Brake Company
    Inventor: Daniel G. Scott
  • Patent number: 5668314
    Abstract: A portable, hand held device for testing the air brakes of a tractor trailer type truck. The device is generally comprised of an elongated body having a cavity bored therein which extends perpendicularly to the longitudinal axis of the body, and an inlet and outlet attached to opposite ends thereof. A valve assembly consisting of a series of co-linearly mounted, axially displacable springs and plungers are operatively positioned within the bore, and effectively open or close the fluid communication between the inlet and outlet. A first hose extends between a compressed air tank and the inlet, and a second hose extends between the outlet and the glad hand of the truck. A lever is pivotally attached to the body for effecting operation of the valve assembly, and thus may be selectively moved to effect the flow of compressed air from the compressed air tank to the glad hand.
    Type: Grant
    Filed: July 19, 1996
    Date of Patent: September 16, 1997
    Inventor: Robert Jones
  • Patent number: 5559281
    Abstract: A test connector for connecting an air brake test device to access ports of an air brake control valve device where such access ports are normally closed by check valves. A plurality of actuator devices corresponding in number to the access ports are provided in the test connector to unseat the check valves and conduct test air to the test device via central passages in the actuators. The actuators are piston operated in response to a pilot pressure received from a source of compressed air remote from the connector.
    Type: Grant
    Filed: April 25, 1995
    Date of Patent: September 24, 1996
    Assignee: Westinghouse Air Brake Company
    Inventors: Albert A. McKay, Stanley J. Pasek, David A. Porteous, Jeffrey D. Reid, Trevor A. Scott, Eric G. Smith, Ulf Stahmer, W. Thomas Digweed
  • Patent number: RE37151
    Abstract: A method and apparatus for testing and filling hydraulic assemblies such as a hydraulic clutch control assembly for a motor vehicle.
    Type: Grant
    Filed: September 30, 1999
    Date of Patent: May 1, 2001
    Assignee: Automotive Products
    Inventor: Robert Henry LaFountain