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| Number | Title | Issue Date |
| 7353885 | Apparatus for coupling an implement to a working vehicle The present invention relates to an apparatus for coupling an implement to a working vehicle, having two lower link bars, a length-adjustable upper link bar, and two lifting elements. The end closest to the working vehicle, of each of the lower link bars and the upp... | 04/08/2008 |
| 7142968 | Hitch raise rate calibration method A method is provided for automatically determining a hitch raise rate calibration value for a hitch control system having a hydraulic actuator for moving the hitch, a valve for controlling flow of hydraulic fluid to the actuator and an electronic hitch control unit.... | 11/28/2006 |
| 7104340 | Towed implement draft force sensor A draft force sensor is provided for a coupling member coupled between a towing vehicle and a towed earth engaging implement, such as a scraper. The draft force sensor includes first and second bores extending through the coupling member. Each bore has a horizontal ... | 09/12/2006 |
| 7025148 | Vehicle with an attachment The invention concerns a vehicle with an attachment, which has a lifting drive with at least one hydraulic cylinder and a control device, the control device having a position sensor and a position generator. It is endeavored to improve the position control of the at... | 04/11/2006 |
| 6830110 | Three-point hitch having flotation A three-point hitch suitable for operation with wide implements is constructed by substituting a pair of flotation actuators for the usual drop links that are normally coupled between a pair of rocker arms and a pair of lower draft links. These drop links are couple... | 12/14/2004 |
| 6612375 | Apparatus for counteracting vehicle pitch variation resulting from the operation of an electronic draft control system An apparatus and method for controlling variation in the pitch of an agricultural vehicle, where the apparatus includes a controller that controls a position of an implement attached to the agricultural vehicle, and a first valve that is coupled to, and r... | 09/02/2003 |
| 6442501 | Method and apparatus for controlling an implement A method and apparatus for determining a velocity of an implement and thereby moving an implement to a desired position. A control system has input signals representative of the implement arm limit position, the implement arm actual position and the imple... | 08/27/2002 |
| 6058342 | Precision control of implement position/motion A system for controlling a function of a machine system including an off-road work vehicle, a moveable device, and a positioning assembly including an actuator for moving the device in response to a control signal. The system includes an operator-adjustab... | 05/02/2000 |
| 5784867 | Variable force traction enhance systems The present invention provides variable force traction enhance systems for vehicles. The systems include one or more hydraulic cylinders connected to an implement and fluidly connected to one or more hydrostatic transmissions. The hydraulic cylinders actu... | 07/28/1998 |
| 5684691 | Method and apparatus for controlling draft of an agricultural implement A control system for regulating the elevational position of an implement carried or trailed by a vehicle, such as a tractor, includes draft force sensors for detecting the draft force produced by interaction of the implement with the ground, and a command... | 11/04/1997 |
| 5320186 | Draft control system with closed loop drop/raise rate control In an automatic draft control system for positioning a hitch, velocity feedback loop techniques are employed to control the rate of movement of the hitch. When the system is operating in an open loop position control mode, a switch mounted on a tractor fe... | 06/14/1994 |
| 5143159 | Draft control system with dual mode draft sensitivity A tractor-mounted three-point hitch for pulling a tillage implement is controlled by a closed loop including draft sensors for sensing the draft on the hitch and providing a draft feedback signal. An operator-controlled quadrant lever provides command sig... | 09/01/1992 |
| 5040119 | Draft control apparatus and method Implement draft control devices are typically utilized on agricultural vehicles such as tractors and on other earthworking type vehicles. Advantageously, such control systems should respond quickly to changing soil conditions, while remaining stable so th... | 08/13/1991 |
| 4796712 | Draft load control systems A control system and method for adjusting the depth of a tractor-drawn draft implement in response to a detection of draft load. The control system compares actual engine rpm to a stored or mapped value of engine rpm at zero engine load conditions for the... | 01/10/1989 |
