Quotables
"To place a man in a multi-stage rocket and project him into the controlling gravitational field of the moon where the passengers can make scientific observations, perhaps land alive, and then return to earth--all that constitutes a wild dream worthy of Jules Verne. I am bold enough to say that such a man-made voyage will never occur regardless of all future advances."
Lee deForest, American radio pioneer ; 1957
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| Number | Title | Issue Date |
| 7384008 | Laser alignment system for a mechanized irrigation system A laser alignment system is provided for a mechanized irrigation system with the laser alignment system being operatively connected to the drive tower motors of the irrigation system to maintain the spans of the irrigation system in alignment. ... | 06/10/2008 |
| 7311275 | Wheel assembly for irrigation system Mobile towers of an irrigation system have drive wheel assemblies that propel the towers along the ground. At least certain of the wheel assemblies may comprise dual wheels that share a common axis of rotation but are separately driven by their own drive motor. By d... | 12/25/2007 |
| 7309035 | Irrigation system joint A flow-through joint in an irrigation machine between the main pipeline section and a swing span, such as a corner span, permits a limited amount of generally linear displacement of the swing span within the joint for speed control or other purposes. A turret that r... | 12/18/2007 |
| 7150419 | Trailer front mounted sprayers The sprayer trailer has a trailer frame with a font end and a rear end. A pair of wheels are connected to the trailer frame. A hitch assembly includes a rear mast with a lower end connected to the trailer frame and a front mast with a front mast top end connected to... | 12/19/2006 |
| 7100849 | Apparatus and method for positioning road marking material application equipment using holographic sights The present invention provides an apparatus and method for applying road marking material to a pavement surface. The apparatus includes a vehicle having a holographic sight and at least one road marking material applicator mounted thereon. In accordance with the met... | 09/05/2006 |
| 7073735 | Boom breakaway system Foldable boom inner wings are attached to a boom center frame through a rocker attached to a breakaway hydraulic cylinder pressurized to full stroke and connected to an accumulator. When a wing impacts an object, the impact load is transmitted through the fold cylin... | 07/11/2006 |
| 7066414 | Method and means for reducing stress in a pivot irrigation pipeline A method and means for reducing stress in a pivot irrigation pipeline by permitting the pipeline to be separated from the center pivot structure while maintaining the pipeline in alignment with the center pivot structure. The alignment assembly of this invention fac... | 06/27/2006 |
| 6928339 | GPS-based control system and method for controlling mechanized irrigation systems A GPS-based control system for irrigation systems includes a power supply, a nonvolatile memory for storing a first set of coordinates corresponding to a reference position for the irrigation system, circuitry for receiving GPS data and using the data to generate a ... | 08/09/2005 |
| 6923390 | Swing arm guidance system A guidance system for controlling the steering of a swing arm on a center pivot irrigation system is provided through the use of two satellite signal receiving antennas associated with a drive tower for the swing arm. The signal receiving antennas are mounted from t... | 08/02/2005 |
| 6755362 | Irrigation system with variable speed drive system An irrigation system for conveying a fluid is provided. The irrigation system comprises a first irrigator span having a first end and extending to a distal end. A first drive system moves the first irrigator span. A second irrigator span extends from the distal end ... | 06/29/2004 |
| 6726132 | Corner irrigation system including an ultra wide band (UWB) guidance system A self-propelled irrigation machine including an elongated main boom pivoted at one end to a center pivot and supported on a plurality of self-propelled, non-steerable drive units. An extension boom is pivotally secured to the other end of the main boom for irrigati... | 04/27/2004 |
| 6254018 | Alignment control for long center pivot irrigation systems An alignment control is provided for long center pivot irrigation systems which include a center pivot structure having an elongated water pipe extending outwardly therefrom with the water pipe being supported upon a plurality of drive units which propel ... | 07/03/2001 |
| 6007004 | Center pivot irrigation system An irrigation system is disclosed which includes a center pivot support having an elongated main water boom pivotally connected thereto which extends outwardly therefrom. A corner span is pivotally connected at its inner end to the outer end of the main b... | 12/28/1999 |
| 5613641 | Center pivot irrigation control system A hydraulic control apparatus for hydraulically powered center pivot irrigation systems which utilizes dual-spool, four-way hydraulic valves for controlling the movement of inner support towers, and a pressure controlled directional valve with a dedicated... | 03/25/1997 |
| 5341995 | Relocatable irrigator A relocatable irrigator for easily converting between irrigation and transport modes of operation. The irrigator includes a number of carriages separated by pipeline spans. The pipeline spans are bridged between adjacent carriages and define a spray line.... | 08/30/1994 |
| 5255857 | Pivot The invention relates to a device to maintain the alignment of two articulated elongate members, particularly adjacent spans of a mobile irrigator or pivot, there being a flexible joint between the spans, connecting them together and having freedom of rot... | 10/26/1993 |
| 4899934 | Irrigation monitor In an irrigation rig made up of sections arranged end-to-end in a line, adjacent sections form angles therebetween, and in so doing form angles therebetween in the transverse movement of the rig. Safety switches are provided between adjacent sections, and... | 02/13/1990 |
| 4703895 | Ground-engaging travelling structure A ground-engaging travelling structure supporting a member which is pivotally mounted on the structure for swinging movement about a fore-and-aft axis of the structure and including a device to maintain the member in a substantially constant position with... | 11/03/1987 |
| 4580731 | Center pivot irrigation system control A control apparatus is disclosed for use in an irrigation system having a plurality of conduit sections pivotally joined at sets of adjacent ends and selectively operable drivers for moving the conduit sections in a forward direction. Each control apparat... | 04/08/1986 |
| 4452394 | Self propelled irrigation systems An improved center pivot irrigation system is disclosed which uses a water driven turbine and a chain drive apparatus to propel the system. Mechanical devices are used for sensing the alignment of the pipeline and actuating the turbine. A cam and cable ar... | 06/05/1984 |
| 4434936 | Irrigation system An irrigation system, such as of the self-propelled type with a series of self-propelled support towers for supporting and moving an irrigation conduit over a field to be irrigated, the conduit comprised of a series of conduit sections supported by the to... | 03/06/1984 |
| 4397421 | Method and means for applying chemicals to a field A liquid chemical spraying apparatus is described whereby liquid chemical may be applied to a field by utilizing a center pivot irrigation system. The center pivot irrigation system comprises a water supply pipe which is movable about a center pivot and w... | 08/09/1983 |
| 4371116 | Variable reactance alignment detector and control An alignment system with a variable reactance element is provided for detection of the angular alignment of two variably positionable members. The variable reactance elements form two oppositely varying impedances. A preferred embodiment of the variable r... | 02/01/1983 |
| 4368848 | Self propelled irrigation systems An improved center pivot irrigation system is disclosed which uses a water driven turbine and a chain drive apparatus to propel the system. A mechanical linkage senses the alignment of the pipeline and actuates the turbine. A cam and cable arrangement is ... | 01/18/1983 |
| 4290556 | Parallel angularity sensor for center pivot irrigation system An angularity sensor is disclosed for incorporation within center pivot irrigation systems for providing a signal to respective controllers controlling the rotational driving force of respective span units in response to angular deviation between adjacent... | 09/22/1981 |
| 4266732 | Variable reactance alignment detector and control An alignment system with a variable reactance element is provided for detection of the angular alignment of two variably positionable members. The variable reactance elements form two oppositely varying impedances. A preferred embodiment of the variable r... | 05/12/1981 |
| 4195781 | Self-propelled irrigation apparatus A self-propelled irrigation apparatus has a main pressurized irrigation liquid distribution pipe with its inner end pivotally supported at a central supply pipe and a plurality of radially extending distribution pipe sections which have swinging connectio... | 04/01/1980 |
| 4191207 | Irrigation pipe control system A laser referenced control system for maintaining sequence and correcting the deflections of a moving irrigation pipe includes a laser positioned on a reference coordinate against which the irrigation program sequence and the motion of the pipe are taken.... | 03/04/1980 |
| 4186880 | Program control for center post irrigation system The present disclosure entails a program controlled multi-loop system for providing even distribution of irrigating water over normally square plots. More specifically the disclosure includes control loops connected to a center post irrigation system whic... | 02/05/1980 |
| 4161185 | Alignment control apparatus for a self-propelled irrigation system An alignment control for a self-propelled irrigation system. The alignment control maintains adjacent pipe segments of the irrigation system in a predetermined alignment and includes an elongated actuation arm pivotally mounted near its center for movemen... | 07/17/1979 |
| 4155679 | Irrigation systems control An irrigation control system includes a rotary water motor operatively associated with valves to provide that the water motor is either in the full on or full off condition, dependent upon alignment of the irrigation line. The irrigation control system al... | 05/22/1979 |
| 4149570 | Nonlinear sensor for center pivot drive control system The present invention discloses an improvement in angularity sensors employed in center pivot irrigation systems. A center pivot irrigation system has a plurality of self-propelled articulating span units mounting interconnected sections of water carrying... | 04/17/1979 |
| 4139018 | System for automatic forward bow alignment on water drive pivot A system for automatic forward bow alignment on a water drive pivot irrigator has a valve assembly associated with each of the towers of the irrigator for regulating movement of the respective tower in a direction of rotation of the irrigator. A flexible ... | 02/13/1979 |
| 4135539 | Speed control means for center pivot irrigation system A method and apparatus for operating a center pivot irrigation system including a plurality of span units, each having a drive carriage having a hydraulically driven motor means for operating associated carriage wheels in response to hydraulic fluid suppl... | 01/23/1979 |
| 4121612 | Brake means for a center pivot irrigation system A brake assembly for a center pivot irrigation system is provided which prevents the drive towers of the system from rolling out of alignment. The assembly includes a signalling system which is mounted on the drive tower and which is connected to a swivel... | 10/24/1978 |
| 4120454 | Center pivot irrigation apparatus An electrically controlled water powered reversible center pivot irrigation apparatus is disclosed. The apparatus includes a multiplicity of water-carrying conduits flexibly connected to each other and supported at intervals by self-propelled supports. Ea... | 10/17/1978 |
| 4108200 | Brake apparatus for irrigation line In a system including, for example, an irrigation line supported by towers and rotatable about a central pivot, a plurality of towers are driven by water motors and include brake systems. Each brake system provides that upon sufficient water pressure bein... | 08/22/1978 |
| 4099669 | Guidance control system for self-propelled mobile sprinkler irrigation systems A mobile sprinkler irrigation system comprising an elongate sprinkler supply pipe supported at one end by a self-propelled pace carriage and along the length thereof by a plurality of spaced self-propelled follower carriages. A tower on the pace carriage ... | 07/11/1978 |
| 4085771 | Angularity sensor means for center pivot irrigation system A center pivot irrigation system has a plurality of self-propelled articulated span units mounting interconnected sections of water carrying conduit, each span unit has motor means and motor control means for regulating the operation of the associated mot... | 04/25/1978 |
| 4083378 | Water drive system for a mobile agricultural irrigation unit This is concerned with a water-driven unit for a center pivot irrigation system in which the pressure of the water in the pipe extending out from the center pivot is used as the motive force for moving the towers about the center pivot.... | 04/11/1978 |
