Cadman
Gregor Cadman, Oakland, CA US
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20130193263 | ROADABLE AIRCRAFT AND RELATED SYSTEMS - The invention relates to a roadable aircraft vehicle ( | 08-01-2013 |
John Michael Cadman, Eden Prairie, MN US
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20090218161 | Control Valve Assembly for Electro-Hydraulic Steering System - A steering system includes a fluid pump and an electro-hydraulic steering circuit in selective fluid communication with the fluid pump. The electro-hydraulic steering circuit defines a first flow path having a first proportional valve and a first load-sense passage in selective communication with the first proportional valve. The first proportional valve includes a closed position. A hydrostatic steering circuit is in selective fluid communication with the fluid pump and defines a second flow path having a second proportional valve and a second load-sense passage in selective fluid communication with the second proportional valve. The second flow path is in a parallel flow configuration with the first flow path. An isolation valve is disposed in the first flow path in series with the first proportional valve. The isolation valve includes a closed position and is piloted to the closed position by fluid communicated through the second load-sense passage. | 09-03-2009 |
20110284311 | CONTROL VALVE ASSEMBLY FOR ELECTRO-HYDRAULIC STEERING SYSTEM - A steering system includes a fluid pump and an electro-hydraulic steering circuit in selective fluid communication with the fluid pump. The electro-hydraulic steering circuit defines a first flow path having a first proportional valve and a first load-sense passage in selective communication with the first proportional valve. The first proportional valve includes a closed position. A hydrostatic steering circuit is in selective fluid communication with the fluid pump and defines a second flow path having a second proportional valve and a second load-sense passage in selective fluid communication with the second proportional valve. The second flow path is in a parallel flow configuration with the first flow path. An isolation valve is disposed in the first flow path in series with the first proportional valve. The isolation valve includes a closed position and is piloted to the closed position by fluid communicated through the second load-sense passage. | 11-24-2011 |
Kristen D. Cadman, Johnston, IA US
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20090220350 | METHOD AND APPARATUS FOR CONTROLLING A HYDRAULIC SYSTEM OF A WORK MACHINE - A method for controlling a hydraulic system includes receiving an operator command signal via an operator command input device; receiving a throttle position signal from a throttle; retrieving from a memory a first predetermined correlation between the operator command signal and a corresponding command flow rate; retrieving from the memory a second predetermined correlation between the throttle position signal and a corresponding available flow rate from a hydraulic pump; determining the command flow rate based on the first predetermined correlation and the operator command signal; determining the available flow rate based on the second predetermined correlation and the throttle position signal; and providing a control signal based on the available flow rate and the command flow rate. | 09-03-2009 |
Kristen D. Cadman, Dubuque, IA US
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20110061448 | HYDRAULIC SYSTEM CALIBRATION METHOD AND APPARATUS - A ground engaging vehicle including a frame, an engine connected to the frame, a controller, and a hydraulic system powered by the engine. The hydraulic system includes a plurality of actuators, a plurality of valves, and at least one sensor. The plurality of valves include a first valve associated with a corresponding one of the plurality of actuators. Each of the plurality of valves is operatively connected to the controller. The at least one sensor is adapted to send a signal to the controller indicating a hydraulic connectivity through the first valve. The controller is adapted to open the first valve allowing hydraulic fluid to pressurize a first actuator until the first actuator is driven to an end of its stroke. The controller is further adapted to close the valve and send an increasing current to the valve. The at least one sensor detects a hydraulic connectivity through the valve and the controller is adapted to establish a threshold current value as the value of the increasing current when the at least one sensor detects the hydraulic connectivity through the valve. | 03-17-2011 |
20110184627 | ENGINE CONTROL SYSTEM - A ground engaging vehicle including a frame, an engine, a controller, an accelerator, a position sensor and an interpreter. The engine is supported by the frame and the engine includes a throttle. The controller is in communication with the engine. The position sensor is associated with the accelerator. The position sensor generates a first signal corresponding to a position of the accelerator. The interpreter receives the first signal from the position sensor and generates a second signal dependent upon the first signal. The interpreter communicates the second signal to the controller. | 07-28-2011 |
Kristen D. Cadman, Platteville, WI US
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20100252354 | Differential Pressure Control - A vehicle with a load sensing hydraulic control system is disclosed. | 10-07-2010 |
Kristen Dawn Cadman, Dubuque, IA US
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20140150304 | HYDRAULIC MANAGEMENT SYSTEM AND METHOD BASED ON AUXILIARY WORK TOOL USAGE - A hydraulic management system and method are provided that account for auxiliary work tool usage. The hydraulic management system automatically calculates an effective use time of a hydraulic element, such as a hydraulic fluid or hydraulic filters, by multiplying work tool usage by a desired gain factor, where the gain factor may exceed 1 for auxiliary work tools. | 06-05-2014 |
Mark Edwin Cadman, New South Wales AU
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20080248453 | Method of Delivering a Test to a Candidate - The invention relates to a method and apparatus for delivering a test, such a test to a candidate. The invention also concerns an apparatus and method of assessing the relative cognitive ability of a candidate. The invention also concerns a method of assessing the progress of a candidate in response to a learning program. The test, assessing or learning program comprise delivering a series of questions type to a candidate, the questions increasing in difficulty as the candidate successfully completes easier questions, the questions being delivered to the candidate in ranges. The questions may be “Swaps” type questions. The candidate may provide their confidence that their answer to any question is correct. A quantifier may be used to assess the candidates progress and/or cognitive skills. | 10-09-2008 |
Richard Edward Cadman, Uttoxeter GB
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20150021116 | Steering Arrangement - A steering arrangement including a first, second, third and fourth hydraulic chamber, the first and third chambers being operable to steer in a first direction and the second and fourth chambers being operable to steer in a second direction. A pump system supplies fluid to a steering system, which is operable to supply the pressurised fluid to one or more of the first, second, third and fourth hydraulic chambers. The steering system having a first mode wherein fluid is supplied to the first and third hydraulic chambers to steer in the first direction, or pressurised fluid is supplied to the second and fourth hydraulic chambers to steer in the second direction. The steering system having a second mode to steer in the first direction, or to steer in the second direction, such that the steering ratio is higher in the second mode than in the first mode. | 01-22-2015 |
William R. Cadman, Fenton, MI US
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20090293599 | WIND CONDITION BASED VAPOR LEAK DETECTION TEST - A control system comprising a wind condition determination module that determines a wind condition and a leak detection test control module that selectively diagnoses a vapor leak associated with a vehicle based on the wind condition. A method comprising determining a wind condition and selectively diagnosing a vapor leak associated with a vehicle based on the wind condition. | 12-03-2009 |
20090308359 | NOISE MINIMIZATION FOR EVAPORATIVE CANISTER VENTILATION VALVE CLEANING - A control system comprising a detection module that detects at least one of a vehicle speed and an engine speed and a canister vent valve control module that selectively modulates the canister vent valve based on at least one of the vehicle speed and the engine speed. A method comprising detecting at least one of a vehicle speed and an engine speed and selectively modulating a canister vent valve based on at least one of the vehicle speed and the engine speed. | 12-17-2009 |
20110011472 | METHOD AND SYSTEM FOR CORRELATING A PRESSURE SENSOR FOR A FUEL SYSTEM - A control module and method for operating the same includes a diurnal control valve module that opens a diurnal control valve (DCV) and an evaporative leak check module (ELCM) diverter valve control module that switches on an ELCM diverter valve. The control module includes a correlation module performs a correlation of a ELCM pressure signal and a fuel tank pressure signal and that generates a fault signal in response to the correlation when the DCV valve is open and the ELCM diverter valve is on. | 01-20-2011 |
20110315127 | LOW PURGE FLOW VEHICLE DIAGNOSTIC TOOL - A vehicle includes an engine, a sealed fuel system having a fuel tank, a canister for storing fuel vapor, a vapor circuit external to the fuel tank, and a control valve. The vapor circuit includes an absolute pressure sensor and a switching valve connecting the fuel tank to the control valve. A controller evaluates or diagnoses a vapor purge function of the sealed fuel system using vacuum measurements from the absolute pressure sensor, executing or diagnosing only when the engine is running, purge is enabled, and the pump is off. The controller diagnoses the vapor purge function by comparing the vacuum measurements to a threshold vacuum. An apparatus includes the vapor circuit and controller. A method for diagnosing the vapor purge function includes actuating the switching valve, measuring a vacuum in the system using the absolute pressure sensor, and comparing the measured vacuum to a threshold vacuum. | 12-29-2011 |
20120041631 | METHOD AND APPARATUS FOR ENGINE CONTROL MODULE WAKE-UP TEST - A fuel system diagnostic wakeup system for a vehicle includes a first control module. The first control module generates a wakeup request, powers off when the vehicle powers off, and powers on and performs a fuel system diagnostic in response to a wakeup signal while the vehicle is powered off. A second control module independent of the first control module receives the wakeup request and generates the wakeup signal after the vehicle powers off based on the wakeup request. | 02-16-2012 |
20120079873 | LARGE LEAK DIAGNOSTIC TOOL FOR A SEALED FUEL SYSTEM IN A VEHICLE - A vehicle includes a sealed fuel system and a controller. The fuel system includes a fuel tank, a fuel cap, a control orifice, and an absolute pressure sensor. The controller associates a threshold large leak in the fuel system with a fuel cap sealing error. The controller detects completion of a prior refueling event, compares measurements from the pressure sensor to a reference vacuum across the control orifice to determine the presence of the threshold large leak, and sets a diagnostic code corresponding to the large leak only upon completion of the prior refueling event. A method for detecting the large leak includes detecting completion of the refueling event, comparing vacuum measurements from the absolute pressure sensor to a reference vacuum across the orifice to determine the presence of the large leak, and setting a diagnostic code corresponding to the large leak only upon completion of the prior refueling event. | 04-05-2012 |
20120097252 | SYSTEM AND METHOD FOR DIAGNOSING FAULTS IN VACUUM PUMPS OF FUEL SYSTEMS AND FOR DIAGNOSING LEAKS IN FUEL SYSTEMS - A control system includes a switching valve control module, a pressure determination module, and a fuel system diagnostic module. The switching valve control module actuates a switching valve in a fuel system of a vehicle between a first position and a second position, the first position venting a suction side of a vacuum pump in the fuel system to an atmosphere, the second position sealing the suction side of the vacuum pump from the atmosphere. The pressure determination module determines a first pressure on the suction side of the vacuum pump when the switching valve is in the first position, and determines a second pressure on the suction side of the vacuum pump when the switching valve is in the second position. The fuel system diagnostic module selectively diagnoses a fault in the vacuum pump based on the first pressure and the second pressure. | 04-26-2012 |
20130184963 | FUEL SYSTEM BLOCKAGE DETECTION AND BLOCKAGE LOCATION IDENTIFICATION SYSTEMS AND METHODS - A system for a vehicle includes a first pressure module and a blockage indication module. The first pressure module receives a signal from a pressure sensor that measures pressure within a fuel vapor purge system. The first pressure module generates a first pressure based on the signal at a first time and generates a second pressure based on the signal at a second time. The second time is after the first time. The blockage indication module indicates whether a blockage is present in the fuel vapor purge system between the pressure sensor and a fuel tank based on a difference between the first and second pressures. | 07-18-2013 |
20140102565 | SYSTEM AND METHOD FOR CONTROLLING A VACUUM PUMP THAT IS USED TO CHECK FOR LEAKS IN AN EVAPORATIVE EMISSIONS SYSTEM - A control system according to the principles of the present disclosure includes a fuel system diagnostic module and a pump control module. The fuel system diagnostic module performs a diagnostic test on a fuel system when a vacuum pump is switched off to prevent flow through the vacuum pump and thereby seal a portion of the fuel system from an atmosphere. The vacuum pump includes a cam ring, a rotor that rotates within the cam ring, and vanes that slide into and out of slots in the rotor as the rotor rotates. The pump control module switches on the vacuum pump for a predetermined period to force the vanes out of the slots and into contact with the cam ring to seal the vacuum pump before switching off the vacuum pump for the fuel system diagnostic test. | 04-17-2014 |