Abstract: Stud hole protection (13, 60), to be inserted into a threaded stud hole (12) in a horseshoe (10). The stud hole protection (13, 60) comprises a stud hole core (21, 81). The peripheral parts of the stud hole core (21, 81) are at least partly provided with a thread connection element (23, 62) of a softer material than the material of the stud hole core (21, 81) and which thread connection element (23, 62) connects to the thread (51) of the stud hole (12) in the horseshoe (10) when the stud hole protection (13, 60) is mounted.

Abstract: A horseshoe 1 for equestrian sport has several holes 2, 3, 4, 5 for accommodating locking cleats 6. The holes 2 are provided on the underside 7 of the horseshoe 1 with a locking projection 8 of smaller diameter with a depth of 3-5 mm corresponding to the cleats 6. In addition or alternatively thereto an adapter 10 is inserted into at least one of the holes 2 serving to accommodate a cleat 6. This is made of hardened material and corresponds with the entire hole 2 or only with the locking projection 8.

Abstract: A horseshoe stock piece and various complementary pieces provide variety of custom features for horseshoes such as heel calk trailers, trailer calks, calk horseshoes and patent shoes. The stock piece is a horseshoe structure with conventional top or hoof surface, a bottom or ground surface, inner and outer faces, fullering on the ground side, and nail holes within the fullering. The heel end of each arm of the stock piece has a flat, rectangular recess formed in the ground surface face which is from 40%-60% of the depth or thickness of the shoe stock. A transverse groove is formed in the central portion of the recess. The groove has walls which are perpendicular to the surface of the groove and there is a threaded aperture formed in the base of the groove. The foregoing is dimensioned to receive a complementary piece secured in the recess. The complementary piece has a transverse extension or lug extending into the groove.

Abstract: A racing plate horseshoe system with movable calks has an arcuate racing plate attachable to a horse's hoof. An elongated groove is provided in the lower surface and has a plurality of spaced-apart threaded holes extending from the upper surface to the groove in the lower surface. The threaded holes are provided with set screws to protect the holes during fitting the shoes. One or more screw-attached calks are mounted to the racing plate, each calk having upstanding tabs engaged into the groove and having a depending blade. The blade calk is attached to the racing plate with a screw replacing the set screw. Each calk may be mounted to the racing plate in with blade in any one of four orthogonal positions with one or more of the upstanding tabs engaged into the groove of the shoe. A preferred embodiment uses cap screws installed in the threaded hole to provide simple wear-resistant calks.