Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 7647816 | Single car test interface device 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 po... | 01/19/2010 |
| 7341207 | Variable water flow and dilution chemical dispenser A dispenser for mixing and dispensing a liquid chemical concentrate from a container with a stream of diluting water. The dispenser includes two valve members which control in one instance the water flow and in another instance the amount of concentrate being siphon... | 03/11/2008 |
| 7231317 | Correlating power signatures with automated equipment A method and system for monitoring the activity of a system of one or more electro-mechanical components that receive electrical current from a power supply. The method and system samples an actual current supplied to the electro-mechanical component from the power ... | 06/12/2007 |
| 7174778 | Control device for a motor vehicle 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... | 02/13/2007 |
| 7040150 | Computerized single car test device system A test system for computerized single car test devices. The test system includes at least one car tester having a first connector for connecting a first port to a brake pipe of the car, valves for selectively interconnecting ports of the tester, at least one pressur... | 05/09/2006 |
| 7017387 | Calibration and validation for leak detector A leak test arrangement having a leak calibration device is disclosed. The calibration device is connected into communication with the leak test arrangement and provides a controlled source (sink) of fluid at a predetermined amount. The calibration includes a substa... | 03/28/2006 |
| 6971724 | Method and apparatus for simulating a failed heavy vehicle air brake system 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 seco... | 12/06/2005 |
| 6938471 | Methods of measuring pressure of hydraulic fluid, methods of evaluating soundness and hydraulic drive devices for carrying out the methods A method is provided for measuring a pressure of a hydraulic fluid that is supplied from a hydraulic fluid control device (1) to a operation device (6). The method includes measurement of a first pressure (Pm) and a second pressure (Pa). The first pres... | 09/06/2005 |
| 6901789 | Method for determining parameters 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/... | 06/07/2005 |
| 6837550 | Brake system diagnostic using a hand-held radio device 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 bra... | 01/04/2005 |
| 6766681 | Malfunction detection device of a bellows type accumulator for pressurized fluid 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 ... | 07/27/2004 |
| 6530261 | Semi-truck trailer brake test device, system and method 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 coup... | 03/11/2003 |
| 6446490 | Method and device for determining the pressure in brake systems 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 on... | 09/10/2002 |
| 6425282 | Portable single car test device 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 per... | 07/30/2002 |
| 6374193 | Method and device for monitoring the functioning of a compressor 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... | 04/16/2002 |
| 6334354 | Portable single car charging and test device 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 per... | 01/01/2002 |
| 6327894 | Portable single car test device 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 per... | 12/11/2001 |
| 6269682 | Portable single car test device 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 per... | 08/07/2001 |
| 6227625 | Two way field tester for EOT device 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 microproc... | 05/08/2001 |
| 6081767 | Method and device for determining the amount of undissolved gas in a hydraulic system 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 co... | 06/27/2000 |
| 5936154 | Driver controlled air system moisture removal and pre-trip inspection system 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 ... | 08/10/1999 |
| 5936153 | Apparatus and method for testing brake actuator units used in railroad cars 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 lik... | 08/10/1999 |
| 5908983 | Method and apparatus for testing the brake system of a vehicle 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, e... | 06/01/1999 |
| 5898102 | Method for performing a brake pipe leakage test 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. The met... | 04/27/1999 |
| 5866811 | End of train device 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 te... | 02/02/1999 |
| 5808909 | Electronic brake control valve tester for rail cars and trains 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 measuri... | 09/15/1998 |
| 5767389 | Method and apparatus for testing a fluid pressure apparatus A method and apparatus for testing and filling hydraulic assemblies such as a hydraulic clutch control assembly for a motor vehicle. A conduit is placed in communication with a pressure chamber of the assembly; air is sucked out of the pressure chamber th... | 06/16/1998 |
| 5767397 | Method and apparatus for testing the brake system of a vehicle 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-t... | 06/16/1998 |
| 5747685 | Automated terminal test procedure 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 con... | 05/05/1998 |
| 5714684 | Test plat adapter for manual single car tester 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 br... | 02/03/1998 |
| 5709436 | Arrangement for connecting a test device to a railroad car brake control valve device 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... | 01/20/1998 |
| 5668314 | Apparatus for testing vehicle air brakes 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 ... | 09/16/1997 |
| 5559281 | Test connector for accessing compressed air at test ports of a railroad brake control valve 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 prov... | 09/24/1996 |
| 5503011 | Test connector for automatic test device A test connector for connecting an air brake test device to access ports provided on an air brake control valve device where such access ports are normally closed by check valves is disclosed. In one embodiment, a plurality of stem operators project into ... | 04/02/1996 |
| 5357800 | Method for air testing hydraulic brake components A production functional test for hydraulic brake control and traction control units which utilizes compressed air as a test medium. Compressed air is applied to an external port of a hydraulic brake or traction control unit which includes valves, accumula... | 10/25/1994 |
| 5141061 | Method and equipment for drilling control by vibration analysis Device for the auditory and/or visual representation of mechanical phenomena in the interaction between a drilling tool and rock being drilled, characterized by the fact that it includes a mechanism for picking up a vibratory signal representing the vibra... | 08/25/1992 |
| 5113694 | Modified pressure regulator valve for single car testing device A conversion kit for modifying a single car test device regulator valve, such as to provide an adjustable maximum test operating pressure in one position of the regulator valve handle, and a reduced operating test pressure in another handle position of th... | 05/19/1992 |
| 4870390 | Device for detecting leakage of precharged gas from gas-type accumulator A gas leakage detecting device for detecting leakage of a precharged gas from a gas-type accumulator which is connected to a hydraulic pump and which stores a pressurized hydraulic fluid delivered from the pump. The pump is turned on to initiate accumulat... | 09/26/1989 |
| 4847770 | Initial terminal tester An automated initial terminal testing system tests the air pressure and leakage of the brake pipes and the operation of brakes of railroad trains (10) in a terminal yard before trains are allowed to go on a railroad. The system includes end of train devic... | 07/11/1989 |
| 4513604 | Method and apparatus for indicating leakage in compressed air line Method and apparatus for indicating on a pressure differential gauge whether air leakage in a compressed air line is within a predetermined acceptable level, the gauge has pressure-responsive and manually shiftable pointers and is connectable in the air l... | 04/30/1985 |
