GB2569301A

GB2569301A - Turf blade lifting assembly

Info

Publication number: GB2569301A
Application number: GB1720658.2A
Authority: GB
Inventors: Hine Rodney
Original assignee: Individual
Current assignee: Individual
Priority date: 2017-12-12
Filing date: 2017-12-12
Publication date: 2019-06-19
Anticipated expiration: 2037-12-12
Also published as: GB2569301B; GB201720658D0

Abstract

A grass blade lifting assembly comprising a flexible mat 10, which may artificial or synthetic turf, the mat having flexible fibres configured to comingle with blades of natural turf; and attachment apparatus 16 for mounting the mat on a mowing machine 14, such as on a grass catching receptacle 12, such that the mat is positioned to be dragged along the turf surface 29 prior to cutting as a means of achieving the upright orientation of the turf blades to create a uniform result for the area mowed. The mower 14 may have a frame 20, wheels 32 and rotatable cutting blade 34. The mat may be removable from the mowing machine. Also disclosed is a method of using the assembly.

Description

Field of the invention:

The invention resides in the field of sports playing field turf maintenance and more particularly relates to turf blade lifting devices for raising or straightening depressed turf blades prior to cutting by a mowing machine.

Background of the Invention

This invention is designed to lift the blades of a patch of natural turf or grass in preparation for cutting by a mowing machine, for example, a reel type power mower used in maintaining a highly groomed portion of a grassy field such as a golf green.

Reel mowers, also called cylinder mowers, familiar as the hand-pushed or selfpowered cylinder lawn mower, have a horizontally rotating cylindrical reel composed of helical blades, each of which in turn runs past a horizontal cutter-bar, producing a continuous scissor action. The bar is held at an adjustable level just above the ground and the reel runs at a speed dependent on the forward movement speed of a machine driven by a rotational support, for example, wheels or drums running on the ground, or in self-powered applications, by a motor. The cut grass is most often gathered in a collection bin or receptacle.

Golf greens in particular are an example of a sport playing field that receive heavy use,

i.e., foot traffic, which mats down sections of the green requiring special attention to lift bent blades prior to cutting as much toward the vertical as possible. A great variety of devices particularly designed or suitable for this task exist in the prior art and include, for example, rake, vacuum, and brush arrangements. Most of these appear as rather complex complicated designs requiring care and adjustment so as not to damage the turf or inadequately prepare it prior to cutting.

Examples include US patents 5,018,587, Grandrud et al., disclosing a plate attachment for mounting a plurality of upright brushes; 5,974,771, Greenan, showing a cylindrical rotating rake, and 7,069,711, Connell et al., illustrating a brush front mounted on a greens mower. Also US patent published application 2006/0123760, Glasscock, discloses a rigidly front mounted pair of brushes; and US patent published application 2006/0277714, Dunning et al, describes a vacuum powered lawn debris collection apparatus.

Summary of the Invention

The invention may be summarized as a turf blade lifting assembly comprising a flexible mat having a flexible back and a surface composed of a plurality of flexible fibers attached thereto. An example of such a mat is one employing artificial or synthetic turf, the fibers of which are of relatively short height and are configured to comingle with natural turf. Additionally, means are provided for mounting the mat on the front of a mowing machine which mat will thereby be positioned to be dragged along the turf surface prior to cutting to achieve the upright orientation of the turf blad es to create a thick and uniform result for the subject area.

In comparison to the prior art, embodiments of the present invention can be much less complicated in structure, more efficient in preparing an area of turf to be cut, more easily attached, less likely to damage the turf, and substantially less expensive to manufacture.

In a preferred embodiment, the mat is shown removeably attached to a grass catching receptacle disposed on the forward end of a particular reel type golf greens maintenance mower. However, it will be seen and understood from the description and drawings below that the novel combination disclosed herein is applicable to other mowers and may use other mats with fibers configured and arranged to comingle with natural turf blades other than artificial or synthetic turf.

Description of the Drawings

Fig. 1 is an elevation view of a preferred embodiment of the invention;

Fig. 2 is a perspective view of the embodiment of Fig. 1;

Fig. 3 is a front view of the embodiment of Fig. 1.

Fig. 4 is cross-sectional view of a component of the embodiment of Fig. 1; and

Fig. 5 is a top view of the component of Fig. 4.

Description of the Preferred Embodiment

Referring to Figs. 1, 2, and 3, a flexible mat 10 of the invention, for example, a section of artificial turf, for instance, a product known as Pro Ball Turf available from Synthetic Turf International, LLC, Jupiter, FL, is shown mounted on grass catching receptacle 12 of a reel mower 14, illustrated, for example, as a John Deere 220 E cut Hybrid.

A mounting fixture 16 which will be further described in detail below facilitates easy attachment and removal of the mat and consists of a cross bar 18 to which the mat is mounted by a series of bolts 20, and a hollow cross bar receiving channel or bracket 22 permanently mounted on grass catching receptacle 12 by bolts 24. A slot 26 across the front of channel 22 allows the cross bar 18 mounting bolts free horizontal movement along the length of the channel allowing the mat and cross bar 18 to be slid into the channel and held in place by a stop bolt 27 at one end, as shown in Fig. 5, and a removable pin 28 at the opposite end.

For reference, additional components of mower 14 include frame 30, wheels or drum 32, and a powered rotatable cutting blade mechanism 34.

Figs. 1, 2, and 3 all illustrate the flexibility of the mat and the height at which it is mounted on the mower in relation to the turf surface. This flexibility and positioning provide for the lower portion of the mat to be dragged over the turf as the mower is propelled forward. This results in the fibers of the mat comingling with the blades of the turf in region 29, as shown in Fig. 1, to lift them to a vertical orientation for uniform cutting.

Figs. 4 and 5 illustrate in greater detail a feature of the invention showing a section of artificial turf or mat in which flexible fibers 36 disposed on flexible back 38 form an array of material highly sui ted to comingle wit h leaves of natural turf. Through experimen tation and calculation, artificial turf having blades or leaves constituting a pile height of between about 6.35mm and 37.5mm (1/4 and 1.5 inches) is most suitable in constructing the invention. Ad ditional manufacturing characteristics which determine the density of the pile have been found to be in ranges as follows:

a face weight (weight of yarn in grams per square meter) of between about

745 and 1627 g/m² (22 and 48 ounces per square yard);

a machine gauge (width between stitch rows) of between about 6.35mm and 9.5mm (1/4 and 3/8 inches); and a stitch rate (number of stitches in a row within 7 5 mm) of between about 18 and per 75mm (3 inches).

Figs. 4 and 5 are further directed to a means of attachment of the mat to a mower having a curved attachable surface as is the case for the mower with a curved grass catching receptacle as illustrated herein. Bushings 40 hold the side ends 42 and 44 of bracket 22 forward in alignment with the central portion 46. Similarly, bushings 48 are employed to space apart mat 10 and crossbar 18 to provide for the insertion and removal of bar 18 into channel 22. This allows the turf blade lifting assembly flexible mat and cross bar portion to be detached from the mower for replacement and for facilitating emptying the grass catching receptacle during a mowing operation.

The above description of the preferred embodiment may be modified within the scope of the claims as will be obvious to those skilled in the art. For example, a mat not comprising commercially available artificial turf could be constructed and substituted therefore. Also, alternative attachment mechanisms such as hook and eye arrangements could be designed to provide separation capability of the mat from the mower.

Claims

Claims:

1. A turf blade lifting assembly for a mowing apparatus having a rotatable cutting blade, said assembly comprising in combination:

a flexible mat attachable to said mowing apparatus, said mat of a width approximately equal to the width of cut of said mowing apparatus, said mat comprised of a flexible back and a plurality of flexible fibers attached thereto, said fibers of a height between about 6.35mm and 37.5mm, said fibers of a stiffness and distribution density configured to comingle with the blades of said turf; and mat attachment means for transversely attaching said mat to said mowing apparatus forward of said blade at a height enabling a transverse portion of the fiber side of said mat to be dragged along the surface of said turf as said mowing apparatus is propelled forward during a mowing operation whereby the weight of said mat results in the comingling of said fibers and said turf thereby lifting said turf blades to an upright position for shearing by said cutting blade.

2. The turf blade lifting assembly of claim 1 wherein said mat is comprised of artificial turf.

3. The turf blade lifting assembly of claim 2 wherein said artificial turf mat has:

a face weight of between about 745 and 1627 g/m2;

a machine gauge of between about 6.35mm and 9.5mm; and a stitch rate of between about 18 and 22 per 75mm.

4. The turf blade lifting assembly of claim 1 wherein said mat attachment means is configured to enable removal of said mat from said mower apparatus.

5. The turf blade lifting assembly of claim 4 wherein said mat attachment means comprises:

a rectangular bar transversely attached to the top of and spaced apart from said mat;

a rectangular channel member configured to be transversely secured to said mowing apparatus, said channel member having a slot in the forward face of said member for receiving said rectangular bar; and locking means for securing said bar within said channel.

6. A mowing machine for sports playing field turf maintenance comprising:

a frame;

a rotational support attached to said frame for moving said machine over said turf;

a powered rotatable cutting blade disposed on said frame;

a grass catching receptacle disposed forward of said cutting blade: and a turf blade lifting assembly according to any previous claim attached to said grass catching receptacle.

7. The mowing machine of claim 6 wherein said mowing machine comprises a reel mower.

8. A turf blade lifting method employable in sports field turf maintenance for lifting turf blades to an upright position prior to cutting with a mowing machine, said method comprising in combination:

A. providing a mowing machine for sports playing field turf maintenance comprising:

i. a frame;

ii. a rotational support attached to said frame for moving said machine over said turf;

iii. a powered rotatable cutting blade disposed on said frame; and

B. providing a turf blade lifting assembly according to any one of claims 1 to 5;

C. attaching said turf blade lifting assembly to said mowing machine forward of said blade at a height enabling a transverse portion of the fiber side of said mat to be dragged along the surface of said turf as said mowing machine is propelled forward during a mowing operation; and

D. propelling said mowing forward to achieve the lifting of said turf blades.