Granted Patent B2

US 12,601,168 · App. 18/531,039 · Granted Apr 14, 2026

Inventor: Ronald D. Shaw (Costa Mesa, CA)

Assignee: SHAW & SONS, INC.

E04B1/483B29C48/00E01C11/14E04B1/48

Abstract

Claims (8)

1 . A method of constructing a concrete dowel placement system, the method comprising the steps of:

extruding a polymer to form a first tubular element having an outer diameter, an inner sleeve and a plurality of splines extending radially outward from the inner sleeve and longitudinally along the inner sleeve;

extruding a polymer to form a second tubular element, the second tubular element having an outer diameter different from the outer diameter of the first tubular element, and an inner sleeve and a plurality of splines extending radially outward from the inner sleeve and longitudinally along the inner sleeve;

attaching an end portion of the second tubular element to an end portion of the first tubular element in a co-axial orientation to form a coupler; and

extruding a polymer to form an elongated, tubular, dowel-receiving sheath, the sheath having at least one interior opening extending along an entire length of the sheath and the sheath being configured to be slidably extensible over the coupler to frictionally engage one of the first tubular element and the second tubular element.

2 . The method of claim 1 , further comprising the step of attaching an end cap to an end portion of the sheath to completely cover the at least one interior opening at an end of the sheath.

3 . The method of claim 1 , wherein the step of extruding a polymer to form a sheath includes forming at least one linear rib protrusion along a longitudinal axis of the sheath on an outer surface of the sheath during extrusion of the polymer.

4 . The method of claim 1 , wherein the step of extruding a polymer to form the sheath includes forming at least one raised helical element on an outer surface of the sheath during extrusion of the polymer.

Continuity (5)

References Cited (170)