OA16672A

OA16672A - Field crop spray apparatus for spraying crops with liquids.

Info

Publication number: OA16672A
Application number: OA1201300096
Authority: OA
Inventors: Henricus Johannes Godefridus Maria Hoeben
Original assignee: Henricus Johannes Godefridus Maria Hoeben
Priority date: 2010-07-06
Filing date: 2011-07-06
Publication date: 2015-12-07

Abstract

A field crop spray apparatus (1) comprises a carrier (5) which can be coupled to an agricultural tractor. A plurality of frames (7) are attached to the bottom of the carrier. The free ends of the frames are provided with rotation dampers (9) to which an elongated blade (11) is fitted. This blade runs parallel to the carrier (5) and sprayers (13) are present on top of the blade (11). The field crop spray apparatus (1) further comprises a cylinder (15) which is connected to the carrier (5), and also a piston (17) that is movable inside the cylinder (15) and is connected to the blade. The piston (17) can be moved with one end in a slot (19) present in the blade (11) and can also be disconnected from the blade.

Description

The invention relates to a field crop spray apparatus for sprayîng crops with liquids, the apparatus comprising an elongated carrier, a plurality of frames connected to the carrier and présent at the bottom thereof, an elongated blade connected to the frames and running parallel to the carrier, and sprayers connected to the blade, which field crop spray 10 apparatus is intended to be coupled to an agricultural tractor where the carrier extends at right angles to the direction of movement of the agricultural tractor.

State of the art.

A field crop spray apparatus of this kind is known from EP-A-l 083 789. In this known field crop spray apparatus frames présent between the carrier and the blade are made of an elastic material. Owing to undulations of the ground the carrier moves up and down during the use of the field crop spray apparatus. During a down movement of the carrier the blade meets with more résistance from the crop so that the frames spring inwardly.

As a resuit, the sprayers continue to maintain their distance from the crop, so that the liquid is distributed unifornily over the crop.

Summary of the invention.

It is an object of the invention to improve the known field crop spray apparatus. To this end the field crop spray apparatus according to the invention is characterised in that the blade is connected to the frames in a hinging manner and the spray apparatus furthermore comprises at Ieast one cylinder which is connected to the carrier or at Ieast one of the frames, as well as a piston which is inovable inside the cylinder and is connected to the blade at a location at a distance from the connection of the blade to the frame. During operation the movement of the blade can be damped by the cylinder. Furthermore, the cylinder can be operated in that the piston can raise the blade. The field crop spray apparatus with a raised blade takes up less space and the distance to the ground is larger, so that the field crop spray apparatus can be transported over the road in a simpler manner.

An embodiment of the field crop spray apparatus according to the invention is characterised in that the piston can be moved with one end in a slol présent in the blade. As a result, the cylinder can be rigidly attached to the carrier.

A further embodiment of the field crop spray apparatus according to the invention is characterised in that the piston can be disconnected from the blade. This can lead to an operating condition in which the blade can rotate freely without experiencing a dumping effect from the cylinder.

In this operating condition it may be advantageous for the blade to be connected to the frame by means of a radial damper or linear damper so that the hinging movement ofthe blade is slightly dampened.

A still further embodiment of the field crop spray apparatus according to the invention is characterised in that lhe frame comprises two parallel arms which are each hingeably connected with one end to the carrier and with the other end are hingeably connected to an intermediate element or the radial damper.

In the field crop spray apparatus according to the invention the sprayer is preferably présent on the blade so that there is a substantially constant distance between the sprayer and the crop during operation.

Brîcf description of the drawings.

The invention will be elucidated more fully below based on examples of embodiment of the spray apparatus according to the invention while reference is made to the appended drawing figures, in which:

Fig. I gives a side view of a first embodiment of the spray apparatus according to the invention during the spraying of the crop;

Fig. 2 shows the spray apparatus where the blade is in transport position;

Fig. 3 shows the spray apparatus where the blade is decoupled from the piston; and

Fig, 4 shows a second embodiment of the spray apparatus according to the invention with a double blade.

SI

Detailed description of the drawings.

Figs. 1,2 and 3 show a ilrst embodiment of the field crop spray apparatus l according to the invention for spraying liquid on crops 3 in various operating conditions. The spray apparatus l comprises a carrier 5 which can be coupled to an agricuitural tractor. A plurality of frames 7 are attached to the bottom of the carrier. The free ends of the frames are provided with intermediate éléments or rotation dampers 9. An elongated blade 11 is fitted to these dampers. This blade runs parailel to the carrier 5 and sprayers 13 are présent on top of the blade 11.

The field crop spray apparatus is intended to be coupled to an agricuitural tractor where the carrier extends at right angles to the direction of movement ofthe agricuitural tractor.

The frame 7 comprises two parallel amis which are each connected with one end in a hinging manner or not to the carrier 5 and with the other end also in a hînging manner or not to the radial damper 9 which damps lhe hinging movement ofthe blade 5.

The field crop spray apparatus l further comprises a cylinder 15 which is connected to the carrier 5, and also a piston 17 that is movable inside the cylinder 15 and is connected to the blade at a distance from the connection ofthe blade 11 to the rotation damper 9. The piston 17 can be moved with one end in a slot I9 présent in the blade 11 and can also be disconncctcd from lhe blade.

Fig. 4 shows a second embodiment ofthe field crop spray apparatus according to the invention. This spray apparatus 21 is provided with a double blade 23. The two blades are then présent at a distance from each other and the sprayer 13 is located in the channel formed between the blades.

Albeit the invention has been described in the foregoing with reference to the drawings, it should be pointed out that the invention is not by any manner or means restricted to the embodiments shown in the drawings. The invention also extends over any embodiment deviating from the embodiments shown in the drawing figures within the spirit and scope defined by the daims.

Claims

CLAIMS;

1. A field crop spray apparatus for sprayîng crops with Iiquids, the apparatus comprising an elongated carrier, a plurality of trames connected to the carrier and présent at the bottom thereof, an elongated blade connected to the Crames and running parallel to the carrier, and sprayers connected to the blade, which field crop spray apparatus is intended to be coupled to an agricullural tractor where the carrier extends at right angles to the direction of movement of the agricultural tractor, characterised in that the blade is connected to the frames in a hinging manner and the spray apparatus furthermore comprises at least one cylinder which is connected to the carrier or at least one of the frames, as well as a piston which is movable inside lhe cylinder and is connected to the blade at a location at a distance from the connection of the blade to the frame.
2. A field crop spray apparatus as claimed in claim I, characterised in that the piston can be moved with one end in a slot présent in the blade.
3. A field crop spray apparatus as claimed in claim I or 2, characterised in that the piston can be disconnected from the blade.
4. A field crop spray apparatus as claimed in claim l, 2 or 3, characterised in that the blade is connected to the frame by means of a radial damper or linear damper.
5. A field crop spray apparatus as claimed in any one of the preceding claims, characterised in that the frame comprises two parallel arms which are each hingeably connected with one end to the carrier and with the other end are hingeably connected to an intermediate element or the radial damper.
6. A field crop spray apparatus as claimed in any one of the preceding claims, characterised in that the sprayer is présent on the blade.