Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7240627 | Crop debris clearing device A residue coulter apparatus that cleanly severs and clears crop debris from a planting row, causing minimal disturbance to the soil. The residue coulter apparatus comprises a pair of flat discs each having a plurality of back swept shark type teeth extending about t... | 07/10/2007 |
| 7225068 | Variable gain logic for a GPS based automatic steering system A method is provided for controlling steering oscillations in a work vehicle having a closed loop GPS based automatic steering system, wherein the closed loop steering system has a default gain and a user defined gain. The method causes the system to automatically a... | 05/29/2007 |
| 7198113 | Hole cutter and method for using same A hole cutter includes a frame and first and second blade halves moveably mounted with respect to the frame. The blade halves are first driven into the ground and then are lifted upwardly out of the new hole with as ground plug therebetween. A lift flange engages bo... | 04/03/2007 |
| 7178477 | Adjustable pilot's tool for maintaining aircraft attitude A tool for use by a pilot as a reference for maintaining a desired aircraft attitude is provided. The tool is a simple mechanical tool that can be removably mounted adjacent to an aircraft windshield, in the pilot's field of view. The tool comprises a central shaft ... | 02/20/2007 |
| 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 |
| 6386294 | Hole making system A hole making system for efficiently cutting a hole into a ground surface and for allowing effective removal of the plug. The inventive device includes a cutter assembly, a tamper assembly slidably positioned within the cutter assembly, and a hammer assem... | 05/14/2002 |
| 6247540 | Blade pitch indicator A blade pitch indicator is releasably secured to a linear actuator in the form of a turnbuckle. The blade pitch indicator comprises a cover having protrusions forming arrow points that line up with a line of demarcation on the linear actuator. Indicia is ... | 06/19/2001 |
| 5887664 | Adjustable depth control mechanism for earth-penetrating disk An adjustable depth control mechanism for use with earth penetrating equipment. The invention includes a hub and spindle assembly for use with an adjustable depth gauge wheel, which is mounted on a support axle. It may also include a position indicator th... | 03/30/1999 |
| 5615744 | Garden hand tool A garden hand tool having a tubular outer member terminating at its bottom end in an elliptically shaped peripheral edge with such end being open, a plunger reciprocally mounted in the tubular member and a spring that resiliently biases the plunger upward... | 04/01/1997 |
| 5596826 | Level indicating mechanism for a work machine A level indicating mechanism for indicating to a machine operator the relative level position of a work machine includes a circular ring magnet and a bullseye level instrument positioned within the ring magnet. A potting material surrounds the level instr... | 01/28/1997 |
| 5579716 | Device for indicating the position of a tractor with respect to a crop row or planter mark A device for indicating the relative position of a tractor with respect to a crop row or planter mark including a vertically disposed, hollow support post secured to the forward end of the tractor at the centerline thereof. A rotatable shaft is mounted in... | 12/03/1996 |
| 5450909 | Grade determining method and apparatus A method and apparatus for determining the degree of grade ( slope ) upon which an earth moving machine is operating wherein a movable sighting device is mounted on the machine in such manner that the forces of gravity cause the device to move such that a... | 09/19/1995 |
| 5450678 | Grass length measuring device The Grass Length Measuring Device is a hand tool for use by groundskeepers to more precisely measure the height of grass growing above the soil. The tool is configured as a tool body having two or more soil penetrating points and a plurality of soil surfa... | 09/19/1995 |
| 5427184 | Crank adjusted depth control for an implement A depth control includes an actuator tube connected for movement with the rockshaft and having a threaded crank supported on the forward end of the tube. A valve operator bracket is slidably and nonrotatably received over the tube and includes a threaded ... | 06/27/1995 |
| 5201372 | Wing fold implement with hydraulic mode indicator A gage connected to the rod end of the wing cylinder on a multi-section implement senses rod end pressure at the output of the hydraulic wing control (HWC) valve. The HWC valve is engaged or disengaged using the selective control valve (SCV) in the tracto... | 04/13/1993 |
| 5170848 | Sod cutting machine A sod cutting machine that includes a towable frame and a series of parallel trailing suspension arms, each suspension arm having a sod cutter disk and roller device for limiting the cutting depth of the disk. Each suspension arm is independently swingabl... | 12/15/1992 |
| 5146686 | Variable centerline sight A centerline sight apparatus includes a housing mounted on the forward end of a tractor with a sight arm operably mounted in the housing for transverse movement with respect to the longitudinal axis of the tractor. A second sight arm is operably mounted b... | 09/15/1992 |
| 5052314 | Planting tube A planting tool for plants comprises a tube having a fixed beak half at its lower end. A hinged beak is hinged to the tube such that the fixed and hinged beak halves together form a beak capable of being pressed into the ground. The beak is then opened to... | 10/01/1991 |
| 5010962 | Indicating apparatus for a coupling Certain earthworking vehicles are often provided with the ability to change work implements to enable them to perform a variety of operations. In many instances, the coupling mechanism between the work implement and the frame structure of the vehicle that... | 04/30/1991 |
| 4986368 | Planting apparatus An auger-like apparatus for boring planting holes includes an elongate shaft carrying a spiral blade or screw flight at its lower end. Means are provided at the outer end of the cutting edge to protect a sprinkler conduit or hose which may be contacted by... | 01/22/1991 |
| 4984957 | Work-implement adapter for front loader An adapter for operatively connecting a work implement such as a bucket or fork to a loader vehicle body. The adapter may be commonly used for connection of various types or sizes of implements. Though easy to use and manufacture, the adapter provides str... | 01/15/1991 |
| 4974682 | Hammer driven soil coring device A hammer driven soil coring device for use on golf course greens having a cylindrical cutting tube that has a lower cutting edge and longitudinally extending guide slots which serve as a guide for an ejector plate. Affixed to the cylindrical cutting tube ... | 12/04/1990 |
| 4947938 | Hole cutter for golf course greens A machine for cutting holes in golf course greens having a threaded drive shaft, a motor to rotate the drive shaft, a sod cutter at the bottom of the drive shaft and adapted to rotate with the drive shaft, a clutch that can be engaged and disengaged with ... | 08/14/1990 |
| 4932476 | Leveling position indicator A level indicator for a disk harrow or the like having a motorized on-the-go leveling adjustment. A small diameter flexible cable is attached to the spring retainer which bears against one end of the coil spring on an adjustable link structure located bet... | 06/12/1990 |
| 4928774 | Cultivator with improved disc positioning means An adjustment means for a cultivator disc which provides lateral, vertical and angular adjustment means. A plurality of discs are mounted in parallel on a gang frame, and may be individually adjusted in the field to exact, predetermined positions establis... | 05/29/1990 |
| 4924374 | Method for automatic position control of a tool A method and apparatus for automaticlly controlling the position of a tool carried by a machine, which in the preferred embodiment may be the blade of a grader or paver for leveling a surface at a chosen depth. The method includes determination of time ta... | 05/08/1990 |
| 4919214 | Centerline sight A centerline sight device is mounted on a tractor to enable the driver to automatically steer the tractor along a center row or longitudinal mark to align the tractor with respect to furrows of crops in a field. The sight device includes a slight arm hous... | 04/24/1990 |
| 4903780 | Mobile, self-propelled crushing machine A mobile, self-propelling crushing machine includes a structure essentially consisting of two beams, on which a central frame is welded. The central frame houses a rotor which is supported on a frame, which, in one form, is lowered by hydraulic cylinders ... | 02/27/1990 |
| 4892157 | Seed metering shaft rotation indicator An indicator is provided for indicating rotation of a seed metering shaft used with a grain drill. The present invention incorporates a cylinder mounted to the seed metering shaft with its longitudinal axis offset but parallel to the axis of the shaft. Th... | 01/09/1990 |
| 4884638 | Soil coring device with a core ejector mechanism A soil coring device with a core ejector mechanism that has a cylindrical cutting tube with two (2) 180 degree opposed tee slots that serve as a guide for an ejection plate, affixed to a cylindrical cutting tube is a tube with a vertically oriented slot a... | 12/05/1989 |
| 4883128 | Guidance system for farm implements A guidance system for a tractor drawn farm implement for providing an indication to the operator of the tractor as to variance of the implement from a desired course includes a pair of horizontally extending feeler rods supported by a shaft and having fre... | 11/28/1989 |
| 4828045 | Dozer blade visual tilt indicator A visual tilt indicator for an implement, particularly but not exclusively for indicating the tilt angle of a dozer blade on a tractive vehicle, wherein the implement is pivotally supported on the vehicle by an implement universal joint and the support in... | 05/09/1989 |
| 4815544 | Cultivator disc adjuster This invention provides a double adjustable weeding disk support device in order to make rapid and positive adjustments of the depth and cut of the weeding disks. This invention is characterized by a shaft having conventional weeding disks rotatably mount... | 03/28/1989 |
| 4760657 | Snow sweeping method and apparatus A snow-sweeping roller for replaceable attachment to a utility road vehicle (1) having brush-equipped roller (4) rotatably affixed at the underside of the vehicle. To achieve low-wear operation of the sweeper roller (4) and simultaneously low energy consu... | 08/02/1988 |
| 4723608 | Depth sensing skid assembly A depth sensing skid arrangement for an implement including a spring steel depth skid connected to a shank which in turn is pivotally connected to a shank support bracket including a spring trip arrangement which permits backing of the implement without d... | 02/09/1988 |
| 4712492 | Implement position adjusting device An adjusting device permitting the operator of a planter to easily and accurately adjust the depth of planting by vertically adjusting the height of the planter frame through use of an adjustable spacer device in the support for the gauge wheels. The adju... | 12/15/1987 |
| 4696486 | Rear steer angle indicator for articulating vehicle A rear steer angle indicator unit for an agricultural or earth moving tractor having a steerable mainframe articulately connected to an independently wheel-mounted rear engine frame: the rear steer indicator unit comprising a sensing unit (33) capable of ... | 09/29/1987 |
| 4650005 | Row crop cultivator with setting indicator A row crop cultivator for use in farming which includes a pair of weeding disks associated with each cultivator unit of which a plurality is ganged together in series. Each weeding disk is bearingly supported by a vertical shaft which is received by a cro... | 03/17/1987 |
| 4646620 | Automatic depth control system An automatic depth control system is disclosed. The system includes a floating piston hydraulic cylinder in which the floating piston is adjusted as a stop for limiting the travel of the main piston in the cylinder. A depth sensing system is provided to s... | 03/03/1987 |
| 4640368 | Draft sensor including strain sensor coupled to load strap A draft force sensor includes a bracket fixed to a tractor frame part. The bracket includes a pair of laterally-spaced legs which support a shaft to which is coupled the fore-end of a draft link. An end of the shaft is coupled to one end of a load strap. ... | 02/03/1987 |
