GOLF SPIKE ASSEMBLY

Abstract: A steel spike 301 is integral with a threaded male connector 302 and a flange which is embedded in a synthetic plastics disc 303, the flange and the disc having four equi-spaced holes for engagement by a two-pronged key. The male connector 302 can thereby be screwed into a female receptacle 101 which projects from the concave side of a dished plate 103. The plate 103 has perforations 106 capped by stoppers 102 and is thereby locked in position when embedded in an injection-mould plate for attachment to the sole or heel of the shoe.

Description: GOLF SPIKE ASSEMBLY This invention relates to the field of athletic shoe manufacture. More specifically, it relates to an improved assembly for providing spiked soles on athletic shoes, particularly on shoes designed for golfers. It has long been understood that it is desirable to provide stability to the wearer of athletic shoes designed for use in golf. Because the motion of the player in execution of drives in the course of this game results in instability of footing, footwear has been provided which has a means to secure the player to the ground during this manoeuvre. Ordinarily, this is accomplished by providing, in the soles of shoes designed for golfers, a pattern of metal spikes which become embedded in the turf, and thus provide the player with a firm footing. Traditionally, the spikes are secured to a rubber or synthetic shoe sole by means of a flat metal plate bearing a series of pronged fasteners around it6 periphery, and a tubular threaded female connector protruding from its centre toward the outside of the shoe. The spike itself is contiguous with a threaded male connector, and is provided with a metal flange containing two holes which permit insertion of a two-pronged key. The two-pronged key, then, is used to turn the flange containing the spike and male connector so as to secure the spike assembly to the receptacle assembly. Because of the required number of spikes, the metal flange portions add considerable weight to the shoe. Therefore, improvements have been made in the spike assembly by using only a metal frame contiguous with the connector and spike, and embedding the metal frame into a plastic or nylon flange. In this version of the spike assembly, the lighter weight of the plastic or nylon results in a lighter shoe. One design of this modification utilizes a plastic thread on the male connector, as well, but this has proved clearly unsatisfactory due to inadequate strength. Another design provides a metal male screw thread, and stabilizes the spike assembly by a series of three fan blade projections from the connector/spike. This design provides two keyholes for tightening the spike onto the receptacle, thus requiring large arc motions in tightening it down. None of the foregoing designs is completely satisnactÏry. Xhe pronged receptacle relies on securing means which, becuase they bear directly against the surrounding material, often cause tearing and weakening of the soles and become loose. The netal flanged spike is unduly heavy; the plastic threaded connector, because of the weakness of the material, tends to strip: the tri-bladed assembly has an uneven weight distribution with respect to the two keyholes provided to secure the spike. The present invention overcomes these deficiencies. The present specification describes both an improved receptacle for the golf spike assembly, and an improved golf spike assembly design. The receptacle is secured to the outer sole layer by injection moulding of material into cavities of the receptacle, thus permitting the receptacle to be secured to an outer sole plate without the shear forces associated with the pronged receptacle. The golf spike assembly is light weight, is easily secured, and is highly reliable. Thus, in one aspect, the invention is directed to an improved receptacle for a golf spike, which comprises an annular, slightly concave dish, from which is extended, at the centre, a tubular, threaded, female connector. The connector is disposed on the concave side of the dish, and will project outward from the sole of the shoe. Surrounding the connector, is a series of circular perforations in the dish which can accommodate injection molded plastic, such as nylon polyamide. These perforations or cavities are covered, on the concave face of the dish, with a cap or stopper to prevent excess material from being extruded from the outer face of the dish. These stoppers are, preferably, integral with the base of the dish. In another aspect, the invention is directed to a golf spike assembly, which comprises a metal frame support having a series of perforations at the periphery and, at the centre, projecting from one face, the steel spike and from the other face a threaded male connector. This frame with its projections is embedded in a concave nylon base which contains four equi-spaced keyholes for use in tightening, which are in communication with peripheral slots in the frame. The concave face of the nylon base is toward the connector, and the spike, thus, projects from the convex side of Ptd The invention will now be described in more detail with the aid of an example illustrated in the accompanying drawings, in which: Figures lA and IB are a bottom plan view and 8 sectional view, respectively, of the receptacle. Figures 2A and 2B are, respectively, plan views of a sole plate and a heel plate arrangement suitable for containing the receptacles. Figures 3A and 3B are, respectively, a bottom plan view and a side view of the golf spike assembly of the invention. Figure 4 is a plan view of the metal frame embedded in the spike assembly. The invention can best be understood by reference to a specific preferred embodiment, as illustrated in the drawings herein. This description, however, is intended to be illustrative and not limiting. Any design within the scope of the appended claims, although not specifically shown in the drawings, is to be considered a part of the invention. The improved receptacle of the invention is shown in Figures 1A and lB. Figure lA shows a plan view of the metal dish which contains at its centre a protruding threaded connector, 101. The connector is surrounded by a series of cavities spaced at positions equidistant from each other and from the centre of the dish, as shown at 102. The dish is cut in an irregular pattern to minimize weight, but other overall shapes, such, as a circular dish, are consistent with the invention. The features of the receptacle are shown in Figure lB, which is a side view of the receptacle. As shown, the dish itself, 103, is slightly concave. The dish is approximately 2-3 cm in its longest dimension, 104, and is approximately 1-3 mm thick, as shown at 105. The dimension 105 need not be completely uniform across the face of the dish. The cavities, 106, are shown capped with stoppers, 102. The cavities extend through the thickness of the dish, and the stoppers are contiguous thereto. These cavities are most conveniently formed by stamping the metal dish so that the stoppers are derived from the same blank as the remainder of the base. Still referring to Figure 1B, the connector, 101, is threaded internally, 107, so as to provide 8 receptacle for connection wlt J)espftD 4 assembly. The receptacles shown in Figure 1 are mounted on the shoe by means of a nylon or other synthetic sole plate in which they are embedded, as shown in Figures 2A and 2B. Figure 2A shows a suitable design for the front portion of the sole, designed to bear seven receptacles at positions 201. The heel plate in this design is able to accommodate four receptacles at positions 202 as shown in Figure 2B. The receptacles are secured to the plates by injection molding of the plate material into the capped cavities, 106. The molded projections within the cavities thus maintain the integrity of the assembly, and because they do not rely on puncturing the plate, as do traditional receptacles, the tendency of the plate to tear is less. The diameter of the cavities designed to receive the injection molded material is approximately 2-5 mm. Figures 3A and 3B show the front and side view of the finished spike assembly; Figure 4 shows the inner frame, which stabilizes it. Referring to Figure 4, 401 shows the spike projecting from the centre of the frame toward the viewer; not shown, but in the same position away from the viewer on the other sideuof the frame is the threaded male connector. The frame itself, 402, is approximately 2-3 cm in diameter, as shown at 403, and is approximately 1-4 mm in thickness (dimension not shown). The periphery of the frame is provided with a series of 4 perforations, 404, which are shown at equal distances from each other and from the centre, and which are designed to accommodate the turnkey used to tighten the spike assembly. In addition, the frame perforations contain perpendicular extensions at 405 to prevent movement of the frame within the assembly. Position 401 in Figure 4 corresponds to position 301 in Figures 3A and 3B. 3A and 3B show the frame embedded in the outer nylon dish, which provides the appropriate surface area and finish, but with less increase in weight than a metal analog. Figure 3B shows a side view where the spike, 301, is indicated protruding from the convex face of a curved nylon outer dish; and the threaded connector projects from the concave face of this dish. The dimensions of the connector, 302, are matched to those of the receptacle, shown in Figure 1B. Typically, the connector 302 has an outer diameter 3-6 mm, and the inner diameter of the receptacle connector shown in 1B at 107, has an inner diameter corresponding to this dimension. Both connectors are about 0.4-1 cm long. The curved nylon base, 303, separates the connector from the spike, as shown in Figure 3B. Figure 3A shows the arrangements of the installation holes, 304, in the nylon base. These are also arranged radially from the centre, and at equal distances. When the frame of Figure 4 is embedded in the finished assembly of Figure 3A, the installation holes, 304, are in communication with the perforations, 404, in the frame. Thus, the entire assembly can be tightened onto the receptacle by inserting a key into the installation holes. As there are four such holes, a double-pronged key can be turned through a small arc in effecting the fastening of the assembly. Further as the perforations are provided with perpendicular edges, 405, the frame is precluded from moving within the nylon outer dish.

Claims: CLAIMS: 1. An improved receptacle for a golf spike assembly, which comprises: an annular, slightly concave, dish: a tubular, threaded, female connector disposed in the concave face of said dish and contiguous with the centre thereof; and a series of cylindrical cavities disposed peripherally to the connector, extending through the thickness of the dish, and each capped by a stopper on the concave face of the dish. 2. The receptacle of claim 1 wherein the dish has a diameter of about 2-3 cm. 3. The receptacle of claim 1 or 2 having the said cylindrical cavities disposed equidistant from each other. 4. The receptacle of claim 1, 2 or 3 embedded in an injectio moulded plate for attachment to the sole of an athletic shoe. 5. An improved golf spike assembly which comprises: a metal frame containing four equidistant rectangular perforations on its periphery; a golf spike contiguous with and protruding from the centre of, the frame, and a threaded male connector contiguous with, and protruding from the centre of, the frame, on the opposite side from the spike. 6. An assembly as claimed in claim 5 and having a diameter of about 2-3 cm. 7. An assembly as claimed in claim 5 or 6 wherein the perforations contain perpendicular projections at their edges. 8. The assembly of claim 5, 6 or 7 having the metal frame embedded in a curved dish constructed of a synthetic material, and disposed in said dish so that the connector projects from the concave face of said dish and the spike from the convex face thereof, wherein said dish contains four equi-spaced holes in its periphery in communication with the perforations of the frame. 9. The assembly of claim 8, wherein the synthetic material is nylon. 10. An assembly according to any of claims 5 to 9, wherein the frame, spike, and connector are formed from a single piece of metal.

Inventors: CHEN, YORK
Applicants: Y. CHEN & CO. LTD.
Application year: 1985
Main classification: A43C15
IPC codes: A43B5, A43C15