Patents Assigned to Dapco Industries
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Patent number: 7555954Abstract: An ultrasonic real-time inspection method which is user-friendly in an interactive environment to provide ease of operation, as well as a combination of consistency, thoroughness, and speed of operation in flaw detection not achievable by other methods. The system and method are useable on a traveling wheel so as not to unduly interfere with normal train operation. The system and method includes a test device that moves along train wheels injecting pulses into the wheel to detect acoustic responses caused at a discontinuity in the wheel. A processor can also be included to determine a pattern of a feature of the wheel associated with the discontinuity.Type: GrantFiled: April 26, 2006Date of Patent: July 7, 2009Assignee: Dapco Industries, Inc.Inventors: Dominick A. Pagano, David W. Giragosian
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Patent number: 7054762Abstract: An ultrasonic real-time inspection method which is user-friendly in an interactive environment to provide ease of operation, as well as a combination of consistency, thoroughness, and speed of operation in flaw detection not achievable by other methods. The method offers significantly increased pattern recognition capability, which provides greater automation potential and reduced missed detection and false alarm rates.Type: GrantFiled: August 28, 2003Date of Patent: May 30, 2006Assignee: Dapco Industries Inc.Inventors: Dominick A. Pagano, John Winkelman, John Rojas, James Norris
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Patent number: 5906224Abstract: An improved, panel-mounted fuel reserve valve for a recreational vehicle fuel system. The valve body is molded plastic with a cruciform-symmetrical arrangement of throughbores defining the fuel inlets, the fuel outlet and a valve bore for receiving an internal valve assembly. In the illustrated embodiment the fuel inlets are coaxial, the fuel outlet and the valve bore are coaxial, and the internal valve assembly includes a ball valve element which mates with O-ring type seals associated with the fuel inlets. In a preferred form the valve includes molded hose connectors inserted in the fuel inlets, the hose connectors having valve seat portions which define retainers for the O-rings to hold them firmly and precisely against the ball valve element in the valve body. The invention is also a method for achieving the inventive valve body structure with little or no "flash" or injection leakage which would affect the valve sealing tolerances inside the valve body.Type: GrantFiled: April 22, 1996Date of Patent: May 25, 1999Assignee: Dapco IndustriesInventors: Willis E. Tupper, Donald Koengeter
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Patent number: 5777891Abstract: An ultrasonic real-time inspection method which is user-friendly in an interactive environment to provide ease of operation, as well as a combination of consistency, thoroughness, and speed of operation in flaw detection not achievable by other methods. The method offers significantly increased pattern recognition capability, which provides greater automation potential and reduced missed detection and false alarm rates.Type: GrantFiled: August 23, 1996Date of Patent: July 7, 1998Assignee: Dapco Industries IncInventors: Dominick Pagano, Brian Mackay, James Norris
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Patent number: 5592078Abstract: A detector and tracker using a three coil sensor for is disclosed. The detector detects eddy current variations caused by differences in electromagnetic characteristics in two adjacent materials. The eddy current variations are measured and compared to determine the magnitude and direction the detector may be from the center of one of the adjacent materials. The magnitude and direction determination by the detector can be used to drive a process controller to position the sensor.Type: GrantFiled: November 29, 1994Date of Patent: January 7, 1997Assignee: Dapco Industries, Inc.Inventors: David W. Giragosian, James R. Norris, Jr., Howard A. Sholl
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Patent number: 5307770Abstract: A priming pump valve for use in conjunction with a fuel system, such as a diesel engine, that does not result in a lag in the fuel flow during normal system operation. The priming pump valve has a control valve movable between a first position for normal operation and a second position for priming that allows for efficient priming of the fuel system when in the priming mode and unrestricted flow of fuel during normal operation of the engine.Type: GrantFiled: July 26, 1993Date of Patent: May 3, 1994Assignees: Davco Manufacturing Corporation, Dapco IndustriesInventors: Stephen D. Davis, Willis E. Tupper
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Patent number: 5256040Abstract: A priming pump valve for use in conjunction with a fuel system, such as a diesel engine, that does not result in a lag in the fuel flow during normal system operation. The priming pump valve has a control valve movable between a first position for normal operation and a second position for priming that allows for efficient priming of the fuel system when in the priming mode and unrestricted flow of fuel during normal operation of the engine.Type: GrantFiled: October 9, 1992Date of Patent: October 26, 1993Assignees: Davco Manufacturing Corp., Dapco IndustriesInventors: Stephen D. Davis, Willis E. Tupper
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Patent number: 4487071Abstract: Rail testing apparatus, particularly useful at the point of manufacture, for detecting flaws in railroad rails. A number of transducers transmit ultrasonic sound waves into a rail under test and receive the associated echo signals. The apparatus advantageously divides the rail into a plurality of measured rail segments and the amount of amplification applied to the associated echo signals may be varied over each rail segment, thus providing the ability to selectively increase or decrease the sensitivity of the testing apparatus. The amplified echo signals are selectively applied to detection apparatus with a positive and negative gating scheme to increase system accuracy and reliability.Type: GrantFiled: September 22, 1982Date of Patent: December 11, 1984Assignee: Dapco Industries, Inc.Inventors: Dominick A. Pagano, Kevin S. Morris
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Patent number: 4429576Abstract: An ultrasonic inspection apparatus for inspecting a test piece includes an ultrasonic transducer for transmitting test signals into the test piece, for receiving associated response signals reflected back thereto, and for generating a defect signal when a response signal indicates an abnormal condition in the test piece. A control signal generator generates a control signal at predetermined intervals of distance of movement of the transducer relative to the test piece while the transducer generates test signals at a frequency independent the control signal frequency. A principal counter counts the control signals and generates an alarm signal when its count exceeds a value indicating that sufficient defect signals have been generated during movement of the transducer over a predetermined distance to confirm the presence of an unacceptable abnormal condition.Type: GrantFiled: August 3, 1981Date of Patent: February 7, 1984Assignee: Dapco Industries, Inc.Inventor: James R. Norris
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Patent number: 4229978Abstract: A system for selectably electrically pulsing each of a plurality of ultrasonic transducers in a testing apparatus in rapid sequence to produce a pattern of ultrasonic energy transmitted into and subsequently received from a test piece comprises a plurality of transducer pulsing circuits, each connected to a different associated one of the transducers. Each pulsing circuit includes a silicon control rectifier connected to ground and a capacitor, connected between the rectifier and the associated transducer, that is dischargeable to pulse the associated tranducer. The rectifier is switchable to an "on" condition to rapidly discharge the capacitor to ground. The rectifier maintains the "on" condition until current conducted through it drops below a characteristic holding current and thereafter switches to an "off" condition.Type: GrantFiled: October 2, 1978Date of Patent: October 28, 1980Assignee: Dapco Industries, Inc.Inventors: Howard A. Sholl, John T. Marshall
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Patent number: 4222275Abstract: A system for non-destructively acquiring and processing information about a test piece includes an array of ultrasonic transducers each adapted to transmit ultrasonic energy into the test piece and to receive ultrasonic energy transmitted back thereto to produce a response signal capable of representing deviation from the expected condition of the test piece. The transducers are mounted on a carriage to be transported relative to the test piece and a transducer control sequentially pulses the transducers while so transported to ultrasonically inspect the test piece and produce a set of response signals representing the inspection. A plurality of transducer monitors, one for each transducer, sequentially monitor each of the response signals and an analogue-to-digital converter converts each monitored response signal to a single set of digital data.Type: GrantFiled: October 2, 1978Date of Patent: September 16, 1980Assignee: Dapco Industries, Inc.Inventors: Howard A. Sholl, John T. Marshall
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Patent number: 4165816Abstract: A cap for a fuel tank such as is used with gasoline engines for chain saws, power mowers, snowmobiles, and the like, which require venting of the tank without danger of fuel leakage resulting from return flow through the vent passageway. The cap has an improved top wall assembly that provides the passageway that is utilized for the venting purposes and in which a check relief valve is housed.Type: GrantFiled: April 10, 1978Date of Patent: August 28, 1979Assignee: Dapco IndustriesInventor: Willis E. Tupper