Rodger L Thummel

US Patent:

20120186684, Jul 26, 2012

Filed:

Jan 24, 2011

Appl. No.:

13/012378

Inventors:

Kenneth Martin Giovannetti - Denver CO, US
James Halfmann - Centennial CO, US
Joe Carmon Haney - Littleton CO, US
Matthew James King - Parker CO, US
Lance D. Miller - Highlands Ranch CO, US
Jonathan Clark Swift - Denver CO, US
Rodger Leo Thummel - Iola KS, US

Assignee:

THE GATES CORPORATION - Denver CO

International Classification:

F16L 11/12
B29C 63/10

US Classification:

138137, 156188

Abstract:

A multi-layer flexible hose with at least one vulcanized elastomer layer and an outermost cover layer of a thermoplastic polyurethane strip that is wrapped and thermally fused to form a continuous layer. The wrapping may be helical or longitudinal. The polyurethane includes a high hardness, a softening point at or below the vulcanization temperature, and an intumescent flame retarding additive stable at the vulcanization temperature. The polyurethane cover adheres to the elastomer layer and contributes to the flame resistance required by API 16D or of Lloyd's Register Fire Tests for Flexible Hoses on Offshore Installations OD/1000/499 rev. 1.