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US 11,555,310 B2Granted
Composite rebar
AssigneeOwens Corning Intellectual Capital, LLC
InventorsShoujie Li, Amol Vaidya, Matthew Donald Keener
Life of this patent
Estimating the term…
Abstract
An improved shaped composite rebar is disclosed.
Claims18
A composite rebar comprising:
- a plurality of continuous fibers arranged parallel to one another to form an elongated member, the fibers being impregnated with a resin matrix;
- and
- a fiber strand,
- wherein the resin matrix is cured to fix the fibers relative to one another,
- wherein the fiber strand is wrapped around an outer surface of the elongated member in a helical manner such that a plurality of adjacent coils extend a length of the elongated member to form t distinct groups of the adjacent coils,
- wherein one or more groups u of the adjacent coils each include a first plurality of the adjacent coils separated by a distance x,
- wherein one or more groups v of the adjacent coils each include a second plurality of the adjacent coils separated by a distance y,
- wherein x>y,
- wherein t=u+v,
- wherein each of the u groups corresponds to a straight portion of the elongated member, and
- wherein each of the v groups corresponds to a bent portion of the elongated member.
8 more elements
A composite rebar comprising:
- a plurality of continuous fibers arranged parallel to one another to form an elongated member, the fibers being impregnated with a resin matrix;
- and
- a fiber strand wrapped around an outer surface of the elongated member in a helical manner to form a plurality of non-overlapping adjacent coils, and
- a bend that causes the composite rebar to form a first straight portion and a second straight portion,
- wherein the resin matrix is cured to fix the fibers relative to one another,
- wherein a distance between each adjacent pair of a first plurality of the adjacent coils is x,
- wherein a distance between each adjacent pair of a second plurality of the adjacent coils is y,
- wherein x>y,
- wherein a central axis of the first straight portion and a central axis of the second straight portion intersect with one another at the bend to form an angle z,
- wherein z>5 degrees, and
- wherein the bend includes more of the second plurality of the adjacent coils than the first plurality of the adjacent coils.
8 more elements
A composite rebar comprising:
- a plurality of continuous fibers arranged parallel to one another to form an elongated member, the fibers being impregnated with a resin matrix;
- and
- a fiber strand wrapped around an outer surface of the elongated member in a helical manner to form a plurality of non-overlapping adjacent coils, and
- a bend that causes the composite rebar to form a first straight portion and a second straight portion,
- wherein the resin matrix is cured to fix the fibers relative to one another,
- wherein a distance between each adjacent pair of a first plurality of the adjacent coils is x,
- wherein a distance between each adjacent pair of a second plurality of the adjacent coils is y,
- wherein x>y,
- wherein a central axis of the first straight portion and a central axis of the second straight portion intersect with one another at the bend to form an angle z,
- wherein z>5 degrees,
- wherein the bend includes more of the second plurality of the adjacent coils than the first straight portion, and
- wherein the bend includes more of the second plurality of the adjacent coils than the second straight portion.
9 more elements
A method of forming a composite rebar, the method comprising:
- providing a plurality of continuous fibers arranged parallel to one another to form a straight elongated member;
- impregnating the fibers with a resin matrix;
- wrapping a fiber strand around an outer surface of the elongated member in a helical manner to form a plurality of non-overlapping adjacent coils, each adjacent pair of a first plurality of the adjacent coils being separated by a distance x and each adjacent pair of a second plurality of the adjacent coils being separated by a distance y;
- forming a bend in the straight elongated member;
- and
- curing the resin matrix to fix the fibers relative to one another and adhere the fiber strand to the elongated member,
- wherein the bend includes more of the second plurality of the adjacent coils than the first plurality of the adjacent coils,
- wherein the distance y between at least one of the adjacent pairs of the second plurality of the adjacent coils increases to a distance y′, and
- wherein x≥y′>y.
6 more elements
Dependencies are inferred from the claim text.