Turf treatment implement

Abstract

A cylindrical turf treatment rotor (10) adapted to be driven in rotation about a horizontal axis (10a), and provided with wear-resistant teeth (13) extending along one or more helical tracks (14a-14d) on the rotor, the teeth being individually attacked to the rotor so as to be capable of individual removal for replacement or refurbishing or for reconfiguring the rotor.

Claims

1. A turf treatment apparatus comprising: a chassis adapted to be traversed over turf to be treated; a cylindrical turf treatment rotor mounted in the chassis, and adapted to be driven in rotation about a horizontal axis; the cylindrical turf treatment rotor being provided with wear-resistant teeth, extending along four helical tracks on the rotor, the teeth being so closely spaced as to be capable of removing, from the turf, in one pass all or substantially all thatch, grass and infected humus or sand, the teeth being individually attached to the rotor so as to be capable of individual removal for replacement, and being connected to adjacent teeth; and a height control arrangement for the rotor adapted to deploy the teeth below turf level.

2. A turf treatment apparatus according to claim 1, in which the teeth extend on four equally spaced helical tracks on the rotor.

3. A turf treatment apparatus according to claim 1, in which the teeth are removably attached to blades fixed on the rotor.

4. A turf treatment apparatus according to claim 3, in which the teeth are bolted on to the blades.

5. A turf treatment apparatus according to claim 4, in which the teeth are attached by a single bolt and the blades have recesses into which the teeth fit so as to be held securely in position by the single bolt.

6. A turf treatment apparatus according to claim 4, in which the teeth are attached by a single bolt and the blades are so arranged in relation to adjacent blades as to define a recess into which the teeth fit so as to be held securely in position by the single bolt.

7. A turf treatment apparatus according to claim 1, in which the teeth have tips extending at least 60 mm above the cylindrical surface of the rotor.

8. A turf treatment apparatus according to claim 1, in which the teeth extend up to 200 mm above the cylindrical surface of the rotor.

9. A turf treatment apparatus according to claim 1, in which the teeth comprise wear-resistant material.

10. A turf treatment apparatus according to claim 9, in which the wear-resistant material is tungsten carbide.

11. A turf treatment apparatus according to claim 1, in which the chassis has a ground roller.

12. A turf treatment apparatus according to claim 1, in combination with a tractor having a power take-off transmission connected to rotate the rotor.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) A cylindrical turf treatment rotor according to the invention will now be described with reference to the accompanying drawings, in which:

(2) FIG. 1 is a perspective view of one embodiment of rotor;

(3) FIG. 2 is a front elevation of the rotor of FIG. 1;

(4) FIG. 3 is an end-on view of the rotor of FIG. 1;

(5) FIG. 4 is a close-up view of teeth on the roller of FIG. 1 showing a first attachment scheme;

(6) FIG. 5 is a close-up view of teeth on the roller showing a second attachment scheme;

(7) FIG. 6 is a view of a single tooth for the scheme illustrated in FIG. 5; and

(8) FIG. 7 is a rear view of a rotor in use.

DETAILED DESCRIPTION

(9) The drawings illustrate a cylindrical turf treatment rotor 10 adapted to be driven in rotation about a horizontal axis—axle 10a—and provided with teeth 13 extending along one or more helical tracks 14 on the rotor 10, the teeth 13 being individually attached to the rotor 10 and connected to adjacent teeth 13, the teeth 13 having tips 13a extending at least 60 mm above the cylindrical surface of the rotor 10.

(10) The tips 13a may extend up to 200 mm above the cylindrical surface of the rotor.

(11) The teeth 13 may extend on four equally spaced helical tracks 14a, 14b, 14c, 14d.

(12) The teeth 13 are removably attached, so that they may be replaced or refurbished when worn or damaged in use and so that the rotor 10 may be reconfigured. With teeth 13 closely spaced along each of four helical tracks 14, the rotor 10 will be capable of removing in one pass all or substantially all thatch, grass and infected humus and/or sand, but with two tracks only, it will function as a scarifier, selectively removing thatch to a desired depth.

(13) In the embodiment shown particularly in FIG. 4, the teeth 13 fit into slots in the rotor 10 surface and are locked in place by connecting members 16 connecting them to adjacent teeth 13.

(14) In the embodiment shown particularly in FIGS. 5 and 6, the teeth 13 are bolted, with a single bolt 13a, to blades 17 welded into slots laser-cut into the rotor surface. The blades 17 have recesses or are so arranged in relation to adjacent blades as to define a recess into which the teeth fit so as to be held securely in position by a single bolt 14.

(15) The teeth 13, as better seen in FIG. 6, are generally trapezoidal in shape

(16) The teeth 13 may be of wear resistant material, but, as illustrated, are of steel tipped with wear resistant material 13a such as tungsten carbide.

(17) In use, as shown in FIG. 7, the rotor 10, not shown per se in this Figure, but mounted in a chassis 42, is drawn over turf 11, by a tractor 41. The chassis 42 has a ground roller 43 and a blade height control arrangement 44 adapted to deploy the teeth 13 below turf level 14. The tractor 41 is driven to traverse the rotor 10 over the turf so deployed and has a power take-off transmission 45 to rotate the rotor 10 so that the blades 13 move through the turf 11 pulling out thatch, natural grass 12 and matrix material, soil and/or sand. The rotor 10 is driven so that the teeth 13 drive into the turf 11 as it moves forward. The material lifted from the turf is driven to the right of the tractor 41 by the action of the helically disposed teeth 13 and is lifted on an elevator 45 into a trailer 46 drawn behind a second tractor 47.

(18) As shown, the rotor 10 has teeth of sufficient depth and density that they can, using rotor height control arrangement 45, remove all or substantially all thatch, grass and diseased matrix, leaving a friable surface onto which fresh seed may be sown. A roller of, say, one metre breadth, may thus treat a football or like sized field on a single pass, two passes at most, an operation comfortably accommodated within a single day's work.

(19) If the rotor 10 is reconfigured by removing teeth from two of the helical tracks—opposite helices, so as to leave the rotor balanced—and deployed, using the height control, so that the teeth penetrate to a lesser depth, the rotor 11 will constitute an effective scarifier, giving a less drastic treatment.

(20) In either configuration, the rotor 10 will leave artificial grass turf reinforcement, such as Desso Grassmaster® reinforcement, unaffected.