US 11,879,258 B2
Fire resistant composite pole
Robert Paulin, Irmo, SC (US)
Assigned to Valmont Industries, Inc., Omaha, NE (US)
Filed by Valmont Industries, Inc., Omaha, NE (US)
Filed on Sep. 8, 2020, as Appl. No. 17/013,908.
Claims priority of provisional application 62/900,693, filed on Sep. 16, 2019.
Prior Publication US 2021/0079682 A1, Mar. 18, 2021
Int. Cl. E04H 12/02 (2006.01); E04B 1/94 (2006.01); B29C 70/32 (2006.01); B29C 70/54 (2006.01); B29L 31/00 (2006.01); B29K 105/08 (2006.01); B29K 309/08 (2006.01)
CPC E04H 12/02 (2013.01) [B29C 70/32 (2013.01); B29C 70/545 (2013.01); E04B 1/94 (2013.01); B29K 2105/08 (2013.01); B29K 2309/08 (2013.01); B29K 2995/0016 (2013.01); B29L 2031/766 (2013.01)] 1 Claim
OG exemplary drawing
1. A composite utility pole, wherein the composite utility pole comprises:
a hollow main body; and
a composite structure comprising a plurality of integrally bonded layers of resin impregnated fiberglass extending along the length of the pole;
wherein the composite structure further comprises an intumescent layer; wherein the intumescent layer comprises high temperature mineral fibers, exfoliating graphite, organic binders; and alumina trihydrate (ATH); wherein the resin comprises DER 331 Epoxy Resin; wherein the fiberglass comprises 330 YIELD GLASS;
wherein the hollow main body comprises a base end having a first circumference and a top end having a second circumference; wherein the first circumference is larger than the second circumference; wherein the hollow main body comprises a center portion; wherein the center portion is tapered along its length.