Abstract:
A landscape edging stake includes a driving end, a penetration end and an edging engagement portion positioned between the driving end and the penetration end. The edging engagement portion includes a rib configured to engage an inner wall of an anchoring bore of an edging link. A ground engagement portion is positioned between the edging engagement portion and the penetration end and includes a helical groove or thread.

Description:
CLAIM OF PRIORITY 
       [0001]    This application claims the benefit of U.S. Provisional Application No. 62/296,380, filedFeb. 17, 2016, the contents of which are hereby incorporated by reference. 
     
    
     FIELD OF THE INVENTION 
       [0002]    The present invention relates generally to landscape edging and, more particularly, to a stake and method for installing and securing landscape edging. 
       BACKGROUND 
       [0003]    Landscape edging finds a wide range of uses by consumers and in the landscape industry. Common uses include separating decorative landscaping fill, such as mulch, bark, sand or gravel from other ground covering, such as a lawn. Other uses for landscape edging include providing a decorative border along driveways or sidewalks and around trees, bushes, planting beds or gardens and the like. Landscape edging may also be used to secure bricks or patio pavers in place, forming an edge between a patio, sidewalk or driveway and another ground covering such a lawn. 
         [0004]    Landscape edging often comes in elongated strips that feature an L-shaped cross section where the vertical wall portion provides a vertical barrier for dividing the landscape fill from the lawn or other ground covering. The horizontal base portion of the edging includes holes through which anchor stakes pass into the ground to secure the edging in place. Such edging is often molded from a plastic material. 
         [0005]    Another type of edging growing in popularity is modular edging that features a number of decorative block or link structures that feature an anchoring tab or similar structure at each end. Each block or link may be, as an example only, approximately twelve inches long. Each anchoring tab features an opening or anchoring bore there through with the anchoring tab positioned higher on one end than on the other. As a result, the links or blocks may be positioned end to end with the anchoring tabs in an overlaying configuration. Anchor stakes may be driven through the overlaying openings of the neighboring links or blocks and into the ground so that the links or blocks are secured together in a chain-like fashion. Such edging provides great flexibility in that curves may be easily accommodated and the links or blocks may be molded in a variety of decorative styles. Furthermore, the links or blocks may be molded from a variety of materials. Indeed, it has become increasingly common to mold the blocks from recycled material such as shredded rubber. 
         [0006]    An anchor stake typically features a pointed penetration end that facilitates driving the stake into the ground and an enlarged head portion that with a top surface that the user pounds with a hammer or the like to drive the stake into the ground. When fully driven into the ground, the bottom surface of the head engages the top surface of the area surrounding the hole in the edging. 
         [0007]    Various forces operate to urge landscape edging stakes out of the ground. These include people or animals inadvertently stepping on the edging, lawn equipment running on top of or over the edging and accidental contact with the edging by landscaping tools. In addition, the landscape fill being contained by the edging may become saturated with water so that a greater force is exerted on one side of the edging than on the other. Furthermore, freezing and thawing of the ground soil causes frost heave which may push stakes out of the ground. 
         [0008]    In view of the above, landscape edging stakes have been developed featuring smooth spiral twists or helical grooves or threads. Such stakes, however, are too easily twisted out of the ground over time due to frost heave. In addition, stakes with circumferential ribs, where the ribs features horizontal top and bottom surfaces, have been developed. Such ribs, however, are also too easily pushed up out of the ground as the soil, due to frost heave, pushes up on the generally horizontal bottom surfaces of the ribs. 
         [0009]    A need exists for a landscape edging stake and method that more securely anchors modular landscape edging in place. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0010]      FIG. 1  is an elevational view of a first side of an embodiment of the landscape edging stake of the disclosure; 
           [0011]      FIG. 2  is an elevational view of a second side of the landscape edging stake of  FIG. 1 ; 
           [0012]      FIG. 3  is a perspective view of the landscape edging stake of  FIGS. 1 and 2 ; 
           [0013]      FIG. 4  is a top plan view of the landscape edging stake of  FIGS. 1-3 ; 
           [0014]      FIG. 5  is a bottom plan view of the landscape edging stake of  FIGS. 1-4 ; 
           [0015]      FIG. 6  is an enlarged elevational view of the edging engagement portion and the head of the landscape edging stake of  FIGS. 1-5 ; 
           [0016]      FIG. 7  is a perspective view of a landscape edging link suitable for use with the landscape edging stake of the disclosure; 
           [0017]      FIG. 8  is a perspective view illustrating the stake of  FIGS. 1-5  being used to secure a number of landscape edging links of the type illustrated in  FIG. 7  together; 
           [0018]      FIG. 9  is a cross-sectional view of landscape edging links being secured together and into the ground using the stake of  FIGS. 1-5 . 
       
    
    
     SUMMARY 
       [0019]    There are several aspects of the present subject matter which may be embodied separatelyor together in the devices and systems described and claimed below. These aspects may be employed alone or in combination with other aspects of the subject matter described herein, and the description of these aspects together is not intended to preclude the use of these aspects separately or the claiming of such aspects separately or in different combinations as set forth in the claims appended hereto. 
         [0020]    In one aspect, a landscape edging stake includes a driving end, a penetration end and an edging engagement portion. The edging engagement portion is positioned between the driving end and the penetration end and includes a rib configured to engage an inner wall of an anchoring bore of an edging link. A ground engagement portion is positioned between the edging engagement portion and the penetration end and includes a helical groove or thread. 
         [0021]    In another aspect, a method is provided for securing a landscape edging link to the ground, where the link includes an anchoring bore. The method includes the steps of providing a stake, where the stake features a driving end, a penetration end, an edging engagement portion adapted to engage an inner surface of the anchoring bore and a ground engagement portion including a helical groove or thread, positioning the penetration end of the stake through the anchoring bore of the edging link and into the ground and driving the penetration end and the ground engagement portion into the ground so that the helical groove or thread engages the ground, and the rib of the edging engagement portion engages the inner surface of the anchoring bore, so that the stake resists twisting up out of the ground due to upward forces on the stake. 
       DETAILED DESCRIPTION OF EMBODIMENTS 
       [0022]    An embodiment of the landscape edging stake of the present disclosure is indicated in general at  10  in  FIGS. 1-5 . While the stake is shown as featuring a generally round cross section, alternative cross sectional shapes may be used. As an example only, the stake is approximately nine inches long. 
         [0023]    As illustrated in  FIGS. 1-3 and 5 , the penetration end of the stake is provided with a pointed tip  12  to facilitate driving the stake into the ground. At the opposite end of the stake, i.e. the driving end, a disk-shaped head portion  14  is provided ( FIGS. 1-4 and 6 ). The head portion  14  has a diameter that is larger than the cross sectional diameter of the remaining portion of the stake  10 . 
         [0024]    Positioned between the penetration end and the driving end are ground engagement and edging engagement portions. More specifically, adjacent to the head portion  14  is the edging engagement portion, indicated in general at  16 . The edging engagement portion is provided with a series of ribs  18 . As illustrated in  FIG. 6 , each rib  18  has a general flat top surface  19  and an outwardly and upwardly inclined bottom surface  20 . It should be noted that while eight ribs  18  are illustrated, an alternative number may be used. 
         [0025]    As illustrated in  FIGS. 1-3 , adjacent to the pointed tip  12  at the penetration end of the stake is the ground engagement portion, indicated in general at  22 . The engagement portion is provided with generally helical threads or grooves  24 . 
         [0026]    Positioned between edging engagement portion  16  and the ground engagement portion  22  is a cylindrical intermediate surface  26 . 
         [0027]    The stake  10  of  FIGS. 1-5  is preferably constructed from injection molded plastic, but it may alternatively be formed from other materials using other methods known in the art. 
         [0028]    Turning to  FIG. 7 , a link of a modular edging system is indicated in general at  30 . The link has a decorative body portion  32  and a pair of anchoring tabs  34   a  and  34   b  formed one on each end. The bottom of the body portion is flat so as to easily rest on a surface, such as the surface of the ground. The anchoring tabs  34   a  and  34   b  are provided with anchoring bores  36   a  and  36   b . The link is preferably formed from a rubber material, but may alternatively be formed from plastic or other materials. 
         [0029]    Tab  34   b  is positioned higher than tab  34   a  and is spaced from the bottom of the link so that the tab of a neighboring link (corresponding to tab  34   a ) may be positioned under tab  34   b  with the anchor openings or bores in alignment. This is illustrated for links  30  and  40  of  FIG. 8 . With the links so positioned, the penetration end of stake  10   a  may be inserted through the aligned tab openings (as illustrated in  FIG. 8 ). The stake may then be driven into the ground by an installer using a hammer to pound on the head  14  of the stake until the stake is fully driven into the ground, as illustrated by stakes  10   a  (partially installed) and  10   b  (fully installed) in  FIG. 9 . As the stake is driven into the ground, the helical grooves ( 24  in  FIGS. 1-3 and 24   a  and  24   b  in  FIG. 9 ) in the ground engagement portion of the stake will cause the stake to rotate slightly about the longitudinal axis of the stake, illustrated in phantom at  41  in  FIG. 2 . 
         [0030]    As illustrated in  FIG. 9  for stake  10   b , the ribs  18   b  of the stake engage the inner surface of the anchoring bores formed through anchoring tabs  42  (of edging link  44 ) and  46  (of edging link  40 ). More specifically, the cross sectional diameters of the ribs  18   b  are preferably sized so that they circumferentially engage the inner surface of each anchoring bore so that turning of the stake is resisted. As a result, the engagement of the ribs  18   b  by the anchoring bores inhibits the ability of the stake to twist about its longitudinal axis, and thus the stakes are resistant to being twisted out of the ground due to frost heave and upward forces acting on the edging. 
         [0031]    As described previously with regard to  FIG. 6 , each of the ribs  18  of the engagement portion of the stake is provided with an upwardly and outwardly inclined bottom surface ( 20  in  FIG. 6 ). This construction facilitates insertion of the ribs through the corresponding anchoring bores of the edging during installation. The flat top edges ( 19  in  FIG. 6 ) of the ribs increase the difficulty in the stakes being pushed up through the anchoring bores. 
         [0032]    In addition, as illustrated for stake  10   b  in  FIG. 9 , the bottom-most ribs  18   b  of the stake may optionally enter the ground. If this occurs, the upwardly and outwardly inclined bottom surfaces of the bottom-most ribs  18   b  reduce the effective forces pushing up on the ribs due to frost heave. 
         [0033]    While the preferred embodiments of the invention have been shown and described, it will be apparent to those skilled in the art that changes and modifications may be made therein without departing from the spirit of the invention, the scope of which is defined by the following claims.