Spike structure for sporting shoes

• US 6,253,468 B1
• Filed: 06/19/2000
• Issued: 07/03/2001
• Est. Priority Date: 07/14/1999
• Status: Expired due to Fees

• Current Assignee: Kyowa Electric & Chemical Company Limited (Kojima Industries Corporation)
• Original Assignee: Kyowa Electric & Chemical Company Limited (Kojima Industries Corporation)
• Inventors: Hirota, Kashichi
• Primary Examiner(s): PATTERSON, MARIE D
• Application Number:
  US09/597,688
• Time in Patent Office: 379 Days
• Field of Search: 36/67.R, 36/67.A, 36/67.D, 361/27, 361/34, 36/59.A, 36/59.B
• US Class Current: 36/134
• CPC Class Codes: A43C 15/161 characterised by the attachment to the sole

Abstract

A spike structure consists of a spike body made of a plastic material, and a self-tapping screw 3 made of a metal. The spike body 2 is comprised of a flange-shaped portion 4 and a threaded stud which has a thread on the outer surface thereof and extends from one surface of said flange-shaped portion 4. An axial bore is formed through the flange-shaped portion 4 and the threaded stud 5, while slits are formed in said threaded stud 5, extending to the free end of said threaded stud. A self-tapping screw 3 is inserted with tapping into the axial bore to be fixed to said spike body. Said self-tapping screw 3 is configurated to stretch said threaded stud radially outwardly when inserted into the axial bore of spike body.

Claims

1. An spike for sporting shoes including,

a spike body made of a plastic material and having a flange-shaped portion, a threaded stud extending from one surface of said flange-shaped portion and having a thread on an outer surface thereof, an axial bore formed through said flange-shaped portion and said threaded stud, and at least one slit formed in said threaded stud;

and,

a metal core inserted into said axial bore of said spike body to be fixed to said spike body;

said flange-shaped portion having spike protrusions on the other surface opposite to said threaded stud;

said core being configured to force said threaded stud radially outwardly when inserted into said axial bore of said spike body;

said core consisting of a self-tapping screw, which is adapted to be screwed into said axial bore of said spike body with a thread tapping action against an inter surface of said axial bore.

2. The sporting shoe spike according to claim 1, wherein said self-tapping screw is tapered to the free end of said threaded stud of said spike body, and forces a base area of said threaded stud adjacent to said flang-shaped portion to expand radially outwardly.

3. The sporting shoe spike according to claim 1, wherein an axial bore formed in said spike body includes a large diameter portion opening onto the surface of said flange-shaped portion having said spike protrusions and a small diameter portion formed in the threaded stud, said self-tapping screw having a head portion adapted to sit on a shoulder area formed between said large diameter portion and said small diameter portion.

4. The sporting shoe spike according to claim 1, wherein two slits are formed on diametrically opposite sides in said threaded stud.