Inventors list |
Assignees list |
Classification tree browser |
Top 100 Inventors |
Top 100 Assignees |
Cadman
John Michael Cadman, Eden Prairie, MN US
| Patent application number | Description | Published |
|---|---|---|
| 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 |
Kristen D. Cadman, Dubuque, IA US
| Patent application number | Description | Published |
|---|---|---|
| 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 |
Kristen D. Cadman, Platteville, WI US
| Patent application number | Description | Published |
|---|---|---|
| 20100252354 | Differential Pressure Control - A vehicle with a load sensing hydraulic control system is disclosed. | 10-07-2010 |
Kristen D. Cadman, Johnston, IA US
| Patent application number | Description | Published |
|---|---|---|
| 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 |
Mark Edwin Cadman, New South Wales AU
| Patent application number | Description | Published |
|---|---|---|
| 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 |
William R. Cadman, Fenton, MI US
| Patent application number | Description | Published |
|---|---|---|
| 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 |