US 12,459,215 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 Nov. 30, 2023, as Appl. No. 18/524,501.
Application 18/524,501 is a division of application No. 17/013,908, filed on Sep. 8, 2020, granted, now 11,879,258.
Claims priority of provisional application 62/900,693, filed on Sep. 16, 2019.
Prior Publication US 2024/0093524 A1, Mar. 21, 2024
Int. Cl. B29C 70/32 (2006.01); B29C 70/54 (2006.01); E04B 1/94 (2006.01); B29K 105/08 (2006.01); B29K 309/08 (2006.01); B29L 31/00 (2006.01); E04H 12/02 (2006.01)
CPC 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); E04H 12/02 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method for forming a composite pole, the method comprising:
rotating a mandrel between a first support and a second support;
moving a delivery ring back and forth across the mandrel;
laying down a resin layer and a layer of fiberglass rovings in a helical fashion and at prescribed angles relative to the main axis of the mandrel;
wherein the resin and fiberglass layers are applied using filament winding; wherein the fireproof layer is wound into the applied layers; wherein the initial layer of fiberglass rovings is applied at an initial angle; wherein the initial comprises an angle between 0°-90°; wherein the initial layer of fiberglass rovings are applied in 5-15 bands at the initial angle to produce a first layer length of 360″; wherein the first layer ends approximately 216″ from the top from the mandrel;
changing the angle of the mandrel to a second angle; wherein the angle of the mandrel is moved 1°-30° to produce the second angle; and
applying a second layer of fiberglass rovings onto the mandrel; wherein the second layer of fiberglass rovings are applied in 5-15 bands to produce a second layer length of 390″; wherein the second layer ends approximately 192″ from the top from the mandrel.