Reinforcing bar splice with cutting edge bolts
OwnerEric J. Wilson, Michael H.S. Ohinventors
Life of this patent
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Abstract
A bolt has a pointed end with cutting edges. The cutting edges may have knurls (grooves) or ridges, and may have a spiral arrangement. The bolt may have a convex end, such as a cone end or a curved end. A plurality of bolts may be used as part of a reinforcing bar splice that also includes a sleeve. The bolts engage threaded holes of the sleeves. As the bolts are tightened, they bore into the receiving bar ends, securing the bar ends within the sleeve. Cutting edges on the bolts aid in boring the ends of the bolts into the reinforcing bar ends. Using cutting edges on the bolt ends allows deeper penetration of the bolts into the reinforcing bar ends, without increasing the amount of torque used.
Claims34
A reinforcing bar splice comprising:
- a sleeve having openings for receiving bar ends of reinforcing bars;
- and
- threaded bolts that engage threaded holes in the sleeve to press against the reinforcing bar ends;
- wherein at least some of the threaded bolts include respective tips with respective cutting edges.
A method of joining reinforcing bar ends, the method comprising:
- placing the reinforcing bar ends in openings on opposite sides of a sleeve;
- and
- screwing bolts through threaded holes in the sleeve, wherein the screwing the bolts includes using cutting edges on tips of the bolts to cut into the reinforcing bar ends, thereby securing the reinforcing bar ends within the sleeve.
A bolt comprising:
- a threaded shaft;
- a head attached to a first end of the threaded shaft;
- and
- a convex tip at a second end of the threaded, opposite the first end;
- wherein at least part of the convex tip includes cutting edges;
- and
- wherein the convex tip has a substantially circular cross-section.
A method of making a bolt, the method comprising:
- forming a convex tip on the bolt;
- and
- stamping the convex tip against a die to form knurls in the convex tip.
Dependencies are inferred from the claim text.