• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A water delivery machine for delivering water under pressure from a pressurized main line to a linear irrigation system, the main line having spaced risers therealong, and wherein the water is delivered continuously as the linear system moves over the field being irrigated. The machine has fore and aft articulated booms, the inner ends of which are connected to the water conduit of the linear system, and the outer ends of which are connected to couplers. The booms provide water conduits to deliver water from the couplers to the linear system. Each boom includes a conduit section extending generally in the direction of travel of the linear system which is supported on a wheeled cart having inner and outer wheel bogeys. The cart wheels are steered, and at least one of the wheels is driven to drive each of the carts along the main line for alternately and automatically coupling and uncoupling each coupler successively with each riser as the linear system moves over the field to automatically and continuously deliver water first from one coupler and boom and then the other coupler and boom to the linear system.
    公开号:SU1367834A3
    申请号:SU843803957
    申请日:1984-10-18
    公开日:1988-01-15
    发明作者:А.Чэпман Джон；М.Джонсон Томас；Л.Ньюбоулд Дональд
    申请人:Валмонт Индастриз,Инк (Фирма)；
    IPC主号:
    专利说明:

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    devices 13. Arrows 9 are pipelines through which water is supplied from connecting pipes. devices 13 into the car. Each boom 9 comprises a pipeline section located in the direction of movement of the machine, which is transported on a wheeled cart 7 having an inner 21 and an outer 20 wheeled axles. Steering is provided for wheel axles. At the same time, at least one of the axes is activated to move the trolley 7 along the main pipeline for alternately and automatically connecting and disconnecting each connecting device 13 successively with each other as the machine moves across the field in order to automatically and continuously supply water from one connecting device 13 and boom 9, and then from another connecting device 13 and another boom to the machine. 5 hp f-ly, 21 ill.
    one
    The invention relates to agriculture, in particular to irrigation technology, and can be used to supply water to self-propelled sprinklers.
    The purpose of the invention is to simplify the design and increase efficiency.
    Fig. 1 is a device for supplying water, an isometric view; Fig. 2 is the same, a side view; fig. 3 shows the main tractor construction, side view; 4 shows a section A-A in FIG. 3, a bridge circuit for articulated links (arrows); figure 5 - section bb in figure 2, the outer end of one of the carriages and the node of the connecting device; figure 6 is a section bb In figure 5; figure 7 - section GG in figure 2, the inner end of one of the carts; Fig.8 is a section dD in Fig.7; Fig.9 section EE of Fig.7; in fig. 10 - „.V. The middle part of one of the carts, isometric view; figure 11 - section WF in figure 2; in Fig.12 - section 3-3 in Fig.11; Fig. 13 is a section of the AND-I of Fig. 11; Fig. 14 is a section of K-K on, the location of the angle sensor between the boom and the carriage released to the limit during normal operation; on Fig - section LL on Fig; on Fig - section MM in Fig.15; Fig. 17 is a section HH of Fig. 3, part of the control mechanism used in this system; on Fig - section 0-0 in Fig; Fig. 19 is a section through Pna of Fig. 18; Fig. 20 is a part of the control joint, an isometric view;
    five
    Fig. 21 shows the connection of the outer end of one of the arms of the coupling with the guide cable, isometric view.
    The drawings show a device for supplying water 1 to a self-propelled sprinkler machine 2. The sprinkler machine 2 includes a series of spans 3, each of which contains a pressure pipe 4 with a connecting device .5 and is located on a self-propelled support tower (not shown). The pressure pipe 4 contains sprinklers 6.
    The water supply device 1 includes four-wheeled carts 7 serving as supports for the water supply piping sections 8 of the intermediate links (arrows) 9. Each boom 9 includes a pressure piping section 10 and an internal pressure piping section 11 connected With the first through a hinge connection. The inner ends of the arrows 9 are connected to the pressure pipe 4 of the machine by means of a manifold 12,. (fig.Z). The outer ends of the booms 9 are connected to the connecting devices 12, supported by the carts 7. The connecting devices 13 are automatically connected and disconnected to the pressure pipe with hydrants 14 located at a certain distance from one another along the length of the feed pipe 15 (Fig. 2, 5 3, 5).
    The joints of the inner ends of the arrows 9 with the collector 12 are located at some distance along
    five
    0
    1367834
    span 3 of the machine from the main tractor 16. The tractor 16 serves as a support for the connecting assembly of the booms 9 with the span, the generator 17 of the fuel tank and other equipment. On the main tractor 16 there is also installed a control means 18, designed to control the machine while moving it along the field along a predetermined path, to ensure the rotation inside them. The bottom one is set by a cable 19 laid above the ground.
    Each bogie 7 includes an outer axle 20 for wheels and an inner wheelbase 21 on which frame 22 is mounted. The frame contains water supply links in the form of a pipe 23 attached by an inner end to a support bracket 24, and external - to a support bracket 25, with a pipe 23 runs mainly parallel to the pipeline under pressure. The bracket 24 is located above the inner wheel axle 21, and the bracket 25 is located between the two indicated wheel axles. In addition, lateral and parallel pipes 26, which extend from it and are attached by rear ends to transverse plates 27 of the vertical frame support 28 of the outer wheel axle 20, are attached to the bracket 25. The vertical support 28 is held above the ground by means of wheels 29 .,.
    As shown in FIGS. 2, 9, 10, the support bracket 25 has a flanged element 30 to which the ends of the pipes 23 and 26 are attached. Depending on the position of the element 30 and the pipe 23, plates 31 and 32 are placed, to the lower parts The tube sleeve 33 is attached thereto. An additional support for the bracket 25 is the supporting rods or cables 34 connected between the bracket and the pipes.
    The support bracket 24 at the inner end of the cart includes plates 35 and 36 to which pipe 23 is attached and whose position depends on the bracket 25 and pipe 23. To the lower ends of said plates is attached a sleeve 37, which is in line with the sleeve 33. Horizontal pipes 23 and 26, the supporting brackets 24 and 25 and the vertical frame 28 constitute the frame 22 of the carriage.
    The outer wheel axle 20 includes a vertical frame 28 with transverse plates 27 and a spacer 38 with grooves located at some distance below the frame. At each end of the transverse elements are vertical tubular elements 39 and receiving tubular elements 40 for
    The ends of the tubes 40 are connected to the brackets 41 of the wheels, which in turn are connected to the axles 42 of the wheels 29. The brackets 41 have taps or flanges 45 between which there is a connecting rod ha 44. Between one of the flanges 43 and the bracket 45 of the frame is located hydraulic cylinder 46 for steering the wheels.
    0 The inner wheel axle 21 is attached to the frame 22 with the possibility of pivoting movements of this axis relative to the frame around an axis parallel to the direction of movement of the system. Wheel axle
    5 21 includes a transversely arranged horizontal transverse beam 47 pivotally connected at the lower end of the bracket 24 with the flanges 48 of the sleeve 37 (see FIGS. 8-10). Sleeve 49 passes
    0 through the middle of the beam, while the beam is hinged to the flanges 48 by means of a pin 50, passing through the sleeve 49 and in one-lined holes in the flanges. At the outer ends of the beam 47, vertical tubes 51 are placed with the possibility of rotation. At the lower ends of the tubes 51 there are brackets 52 of wheels, on which are mounted an engine and water with gears 53, which drive the wheels 29 of this axis. Between the flanges 54, protruding from the tubes 51, connected connecting ha ha 55. Hydraulic cylinder
    2 56 is connected between one of the flanges 54 and a bracket 57 attached to the beam 47 in such a way that during its operation the wheels 29 are controlled.
    Pipeline sections 8 carried on carts include a rigid pipe section 58 and section 59 with a flexible hose (FIG. 2). The rigid pipe section 58 passes through the sleeves 33 and 37 of the brackets 25 and 24, as a result of which the rigid pipe section 58 can be rotated or rotated around its longitudinal axis in said sleeves.
    0
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    The flexible hose section 59 is connected between the rear end of the pipeline section and the connecting device 13 and allows the connecting device 13 to vertically move between the solid and transparent position lines shown in Fig. 2 to connect and detach the connecting device from the stand. The connecting device 13 is mounted on the support 28 for vertical movement between the positions in which it is connected and disconnected, while it is installed on the switches 80 and 81, and
    driven by a hydraulic cylinder 60.
    The device 13 includes an actuator 61 mounted on the end of the vertical lever 62 and intended to actuate the switch after engagement with the column or pillar 63.
    The inner end of each pipeline section 8 extends somewhat inwardly beyond the wheel axle 21 and is connected to the pipeline section 10 by means of rectangular nozzles 64 and 65, between which a flexible coupling assembly 66 and a hinge assembly 67 are provided (Figures 2 and 11). The flexible connector assembly includes a short flexible hose section 68 connected between the pipe 64 and the coupling 69. Swivel struts 70 are located on each side of the flexible hose section 68. The hinged joint node 67 includes four brackets 71 located at some distance from each other around the protruding the end of the coupling 69. The port 65 has a lower inlet end 72 that passes through the protruding end of the coupling 69 to provide a pivotal movement relative to it. A ring-type seal 73 between these two turning parts provides a hermetic delay preventing the ingress of fluid. The channel elements 74 extend vertically from the brackets .71 and contain rollers 75 mounted at their upper ends moving along an annular rail 76 located around the inlet coupling 69.
    Next to the hinge connecting nodes 67 are sensors
    angle 77 to determine the magnitude of the angular displacement of the pipe sections 10 relative to the pipe sections 8. These angle sensors determine the maximum elongation and contraction of the carts 7. Each angle sensor 77 includes a lever 78 attached at one end to the coupling 69 outward in the direction perpendicular to the direction of movement of the machine 2, a vertical lever 79 is located at the outer end of the lever 78, on which the 0
    five
    each of them has a corresponding drive 82. Switch 80 controls the drive of the truck and the main tractor under normal operating conditions, and the switch 81 performs the function of an emergency switch that turns off the entire machine in the event of a trip. The adjustable levers 83 and 84 are connected to the pipeline section 10 above the levers 78 by means of a bracket 85, which is provided for the pipeline section 10. Each of the levers 83, 84 contains an inner 86 and an outer 87 elements, the inner element being designed to engage with a switch actuator 80 a external - clutch with actuator switch 81. Both the internal and external elements of these
    The levers are adjusted by tightening the nuts 88 and locking screws and slots 89, which allows the amount of angular displacement at which the switches 80 and 81 to operate to be adjusted.
    Switch 80 is a double action switch. Thus, with a given direction of movement of the irrigation system, when
    5, the pipeline section 10 is displaced by a certain angle relative to the pipeline section 8 in one direction by a predetermined amount, one end of the inner element 86 of the lever 83 engages with the actuator of the switch 80, which causes the actuator to operate in one direction and stop as a result of the trolley 7. If the pipe section 10 is displaced by a certain angle relative to the pipe section 8 by a predetermined amount in the opposite direction, the outer end of the inner element 86 is engaged in
    0
    55
    a drive with a switch 80, which causes this switch to operate in the opposite direction and stop the tractor. Switch 80 operates the other way around if the irrigation system moves in the opposite direction. FIG. 14, which shows the boom and trolley fully discharged, explains the indicated operating conditions of the switch 80. If for some reason the operation of the switch 80 does not cause the cart or the main tractor to stop, then moving them further will trigger the emergency switch 81 under external element 87, which will shut down the entire system.
    Pipeline sections 10 and 11 each-20 false direction. Each of the means
    control 104 is located at the end of the forward protruding arms 105 and contains switches placed in the housings 106 and forming part of an electric 2F-machine control circuit, these switches being actuated by dependent levers 107. If the wheel axle 20 tends to deviate from a predetermined path , one of the levers engages with cable 19, which leads to turning
    The booms are connected by flexible connecting nodes 90 (similar to node 66) and hinge nodes 91 (similar to hinge angle 67). The flexible joint assembly 90 allows bending through this joint assembly around a horizontal axis, perpendicular to the longitudinal axis of the pipeline section 10. The connecting assembly between said pipeline sections also includes rectangular nozzles 92 and 93.
    Each pipe section 11 is connected to the water pipe of the sprinkler by means of a manifold 12 by means of a flexible coupling 94, similar to node 91. Articulated booms 9 are held in an elevated position at the hinge connecting nodes 91 by means of bridges 95 and pull cables 96 connected between the bridges and the outer ends of the pipe sections 11. This bridge includes a central vertical support element 97 extending upwards from the base 98 attached to the collector 12. Additional vertices ikalnye support members 99 extend upwardly from the pipe sections 11 in an outward direction from 94. The flexible connecting members placed on top of elements 97 and 99 are connected one with
    Wheel axle 21 is controlled in the same way as wheel axle 20 control. For this purpose, means 45 are provided for steering gear 108 located at the front ends of the levers 109, the term “front” is used to refer to the direction of movement of the system. These controls contain switches located inside the housing 110, and these switches are actuated by dependent lever 111. If the wheel axle 21 departs
    the other, by means of a transverse crossbar 100, and the pull rods 96 of the way defined by the cable 19, one of the fasteners near the tops of the uprights 99. In the levers 111 pivots down and as another additional support for the pipeline sections 11 serves the Lodkov support 101, spreads vertical position, causing the switch to operate, which is part of the circuit
    under the manifold 12. This support has a lever 102 attached to the pressure pipe 4, while the external ends of the lever 102 are rotatably connected to the elements 103 of the boat support that support the pipeline sections 11 from below.
    The wheels of the outer wheel axle 20 are controlled by means of control means 104, the control means 104 determining the position of the wheel axles 20 relative to 5 of the cable 19 when the machine is moving in one direction along the main pipeline; the same function when the machine moves in the opposite direction. Each of the means
    control 104 is located at the end of the forward protruding arms 105 and contains switches placed in the housings 106 and forming part of the electrical control circuit of the machine, these switches being actuated by dependent levers 107. If the wheel axle 20 tends to deviate from a given path, one of the levers engages with cable 19, which leads to turning
    This lever and actuation of the switch, located in the housing 106. This leads to the inclusion of a control circuit that controls the operation of the cylinder 46, controlling the steering wheels and, therefore, the wheel axle 20, which in this case goes back to the cable.
    The wheels of the wheel axle 21 are controlled in the same way as the wheel axles 20. For this purpose, steering means 108 are provided located at the front ends of the levers 109, the term front is used in relation to the direction of movement of the system. These controls include switches located inside housing 110, and these switches are driven by dependent levers 111. If the wheel axle 21 departs from
    the path defined by the cable 19, one of the levers 111 turns downward and
    the path defined by the cable 19, one of the levers 111 turns downward and
    occupies a vertical position, causing the operation of the switch, which is part of the scheme
    controlling the operation of the cylinder 56. The cylinder 56 is actuated to control the wheels, with the result that the wheel axle returns to a predetermined position relative to the cable.
    The linear arrangement control 18 includes a lever 112 extending to the side of the main tractor 16 in the direction of the control cable 19. The lever 112 is pivotally connected to the main frame element 113 of the main tractor by means of a pin 114 and a groove 115. The horizontal flanged plate 116 is held by the lever 112 at its location removed outward from frame element 113, and brackets 117 extend vertically from this lever in the same place where this plate is located. This lever is held in a raised horizontal position by means of springs 118 and a frame member 113. Under the outer end of the lever 112 mounted roller 119 on the shaft 120, supported by the brackets 121 of the specified lever.
    A pair of lever mechanisms 122 and 123 are rotatably mounted at locations 124 of lever 112. Lever mechanisms 122 and 123 include each lever element 125, extending from above parallel to cable 19, and lever element 126, which forms a fixed exact angle with lever element 125 using angular plates 127 and directed towards the main tractor. The outer ends of each lever 125 are supported by a guide cable 19 by means of a roller 128. To the outer end of each lever 125. attached to the blade plate 129.
    The inner end of each lever member 126 rests on the plate. 116 via the roller 130, whereby the lever 126 can freely roll along the plate 116 along an arcuate path. By the end of the lever 126, by means of threaded rods 131, an L-shaped bracket 132 is attached with the possibility of adjusting the position of its installation. At the end of the bracket 132 there is a vertically located pin 133.
    To the vertical brackets 117 of the lever 112, at the location of the inner ends of the levers 126, the covers of 134 switches are installed. Each housing 134 houses two groups of you.
    0
    key switches, each group comprising two switches 135 and 136. The switches of each group are actuated by means of a lever 137 and a cam 138 mounted on a pivot pin 139 extending downward from the switch housing. To the lower ends of the pins 139, the arms 140, are secured. 141, which are located on each side of the pin 133. Levers. 140, 141 are centered via an axis 142 that is adjustable in the opening 143 provided on the front part of the switch housing. The levers 140, 141 are biased by springs into a closed attachment, as shown in Figs. 18 and 19. A spring 144 is used for this purpose, connecting these levers.
    The operation of the device is as follows.
    For control, there is a lateral rod located on the side or
    5 cable 19. As in the case of steering each axle of the trolley, only one of the lever mechanisms 122, 123 of the corresponding casing 134 for the switches is in operation for a given direction of movement of the machine across the field. If the system moves in the direction of the arrow, as shown in Fig. 1, then the lever mechanism 122 with the lever element 125, which is mounted in the forward direction relative to the direction of movement of the system, and the corresponding casing 134 for switches, participate in the control of the machine. If the machine tends to move to the right with respect to that shown in Fig. 1 and the main tractor also has a tendency to: turn from the path given by the guide cable 19, this will cause the lever mechanism 122 to turn in a counterclockwise direction. 18 and 20, as a result, the lever member 126 is rotated forward. This will cause the pin 133, attached to the outer end of the lever member, to turn the lever 140 in the forward direction, i.e. in the counterclockwise direction, as seen in Fig. 18, one of the switches 135, 136 is actuated. The operation of such a switch is used to control the end tower of the Latch, which is located at the left
    0
    five
    0
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    0
    55
    eleven
    end of linear system; to turn off the drive of this tower and by means of this turn the entire machine in a counterclockwise direction with reference to the one shown in figure 1).
    As a result, the main tractor is forced to move in the direction of the guide cable 19. After the linear system returns to a predetermined path, when the main tractor is again shifted to the appropriate distance from the guide cable within the accepted tolerances, the linkage 122 rotates back to its original position where the switch 135, 136 is not activated and both end towers of the machine are connected to their drives again. Similarly, control occurs if the machine tends to move to the left.
    The water supply device 1 operates on the principle of a slow worm, moving along the pressure pipeline, whereby the connecting devices 13 are alternately connected and disconnected from the racks 19 as the map 2 moves across the field. The carriages 7 are located in one line and therefore do not pass by one another, due to which at least one of the connecting devices 13 is always connected to the stand, which ensures a continuous supply of water to the linear system. Each connecting device 13 is connected in series to each sink as the system moves over the irrigated field I
    In the initial period, both connecting devices 13 are connected to adjacent stands 14. By connecting the front connecting device, followed by a hundred, the next half of the operating cycle begins. After the front connector is connected, followed by a stand, the switch of this connector opens, sending a signal to disconnect the rear connector, causing the water supply to the machine to stop through the rear connector and the rear articulated boom. After the rear coupling device is completely disconnected, a switch is activated, which switches on when
    783412
    waters of the rear carriage 7 to move it forward. Moving the indicated cart forward continues- | c until a back boom angle sensor 77 detects the maximum allowable position of the rear car by retracting the lever 83 to the angle sensor switch 80. Meanwhile the main tractor and the sun are linear.
    ten
    the system continues to move forward, in connection with which the same yoke mode takes place for the rear bogie
    ki, and this mode continues
    5 until the rear connector 13 is half a dozen above the next station, i.e. above the one with which the front connector was previously connected.
    0 The fact that the rear connector is directly above the next one is determined by the action of a switch actuator 61 located at the rear end.
    5, the rear coupling device, on the rack 63, located next to the bench, at this time, the rear trolley stops and the cylinder 60 is put into operation, which moves the rear coupling device to connect to the bench. In this case, water is again supplied to the machine through two connecting devices and two pipelines of articulated booms.
    Hm
    权利要求:
    Claims (6)
    [1]
    1. Device for supplying water to the sprinkler in motion, so40
    holding front and rear, spaced apart from each other along the length of the inlet pipeline and parallel to the water supply sections, the inner walls of which are connected through intermediary links with the sprinkler, and the outer sections with couplings that interact with the hydrants of the inlet pipeline spaced along the length, and stocked
    50 support trolleys and a means for automatic sequential subCelling of section sleeves to gadrants, characterized in that, in order to simplify the construction and increase operational efficiency, the intermediate links are made in the form of hinged-connected pipelines equipped with means for limiting their turning relative to each other, the power supply sections are also provided with support carriages at the inner ends, which have steering equipment and installation, while the water supply device has a sensitive medium in responsive to the maximum extension and retraction of the units associated with means for limiting rotation of the sections and stop means supporting trolleys.
    [2]
    2. A device according to Claim 1, characterized in that each trolley comprises means for restricting the rotation of the inner wheel axle relative to the outer one around an axis parallel to the direction of travel of the machine.
    [3]
    3. A device according to claim 2, characterized in that each trolley comprises means for limiting the rotary engine of at least a part of the first pipeline
    /five
    section around its longitudinal axis relative to the support carts.
    [4]
    4. A device according to claims 1 to 3, characterized in that each supporting carriage is driven by at least one of the wheels.
    [5]
    5. A device according to Claim 1, characterized in that it has a means of controlling the movement of carriages in parallel to the supply line connected with the steering means of each trolley, and. means for maintaining a fixed lateral displacement between the carts and the sprinkler within the prescribed limits.
    [6]
    6. A device according to claim 5, wherein the means are.
    The controls are made in the form of a cable arranged parallel to the supply pipeline, and each trolley has sensitive means interacting with the cable.
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    SU1367834A3|1988-01-15|Arrangement for supplying water to sprinkling machine in motion
    US3970102A|1976-07-20|Pipe-following irrigation machine
    US9144203B2|2015-09-29|Continuous-feed linear irrigator with separate or integrated docking devices and related method
    US20090308417A1|2009-12-17|Rollover Car Wash for Large Vehicles
    US3583639A|1971-06-08|Wheel and drive means for irrigation sprinkler system
    US4330085A|1982-05-18|Laterally mobile irrigation system
    US4274584A|1981-06-23|Land irrigation system and method
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    US3653400A|1972-04-04|Self-propelled irrigation sprinkling system
    US3878911A|1975-04-22|Hydraulically propelled high clearance agricultural vehicle
    SU1123530A3|1984-11-07|Apparatus for supplying water to moving sprinkler
    WO1987000724A1|1987-02-12|Arrangement in an irrigation system
    CA1135301A|1982-11-09|Laterally mobile irrigation system
    US10477784B1|2019-11-19|Irrigation system
    CA1179704A|1984-12-18|Land irrigation system and method
    同族专利:
    公开号 | 公开日
    ES544046A0|1986-06-16|
    YU101484A|1987-12-31|
    ES8604755A1|1986-03-01|
    ES538065A0|1986-03-01|
    US4609147A|1986-09-02|
    ES8608277A1|1986-06-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US870700A|1907-01-10|1907-11-12|George H Thebus|Street-flusher.|
    US3441941A|1966-05-09|1969-04-29|Belock Instr Corp|Film strip precision dynamic plotting projector|
    IL45229A|1973-07-13|1976-09-30|Palma H Di|Watering installation|
    US4036436A|1975-09-02|1977-07-19|Standal Norman S|Self-propelled linear irrigation system|
    US4172556A|1975-09-02|1979-10-30|Standal Norman S|Self-propelled linear irrigation system|
    US4085771A|1976-10-12|1978-04-25|The Toro Company|Angularity sensor means for center pivot irrigation system|
    US4172551A|1977-11-29|1979-10-30|Valmont Industries, Inc.|Linear move irrigation system and control therefor|
    US4274584A|1978-03-17|1981-06-23|Noble Allen T|Land irrigation system and method|
    US4412655A|1978-03-17|1983-11-01|Noble Linear Irrigation, Inc.|Land irrigation system and method|
    US4413783A|1980-06-23|1983-11-08|Valmont Industries, Inc.|Coupler for an irrigation system|IL118787A|1996-07-04|2000-02-17|Israel State|Method for applying plastic soil mulch|
    WO2006091057A1|2005-02-28|2006-08-31|Lg Electronics Inc.|Refresher and machine for washing or drying with the same|
    US10687484B1|2013-03-15|2020-06-23|Christopher Guy Williams|Irrigation system|
    US9144203B2|2009-05-15|2015-09-29|Project 088 Llc|Continuous-feed linear irrigator with separate or integrated docking devices and related method|
    EP2603700A4|2010-08-11|2017-05-31|Valmont Industries, Inc.|Pumping system and method for controlling it|
    US9392754B1|2013-12-18|2016-07-19|Valmont Industries, Inc.|Drive unit|
    US9832940B2|2015-04-22|2017-12-05|Valmont Industries, Inc.|Irrigation system having terrain compensation|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    US06/583,571|US4609147A|1984-02-24|1984-02-24|Water delivery machine for an irrigation system|
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