US 12,129,939 B2
Early life erosion tracking layer for high pressure fracking hoses
Istvan Grepaly, Budapest (HU); Tamas Mezo, Szeged (HU); Gergely Szekely, Houston, TX (US); Zsolt Kovacs, Szeged (HU); Jeno Kotai, Szeged (HU); and Tibor Nagy, Budapest (HU)
Assigned to ContiTech USA, Inc., Fairlawn, OH (US)
Appl. No. 17/755,220
Filed by ContiTech USA, Inc., Fairlawn, OH (US)
PCT Filed Nov. 16, 2020, PCT No. PCT/US2020/060647
§ 371(c)(1), (2) Date Apr. 22, 2022,
PCT Pub. No. WO2021/101820, PCT Pub. Date May 27, 2021.
Claims priority of provisional application 62/936,631, filed on Nov. 18, 2019.
Prior Publication US 2022/0373111 A1, Nov. 24, 2022
Int. Cl. F16L 57/06 (2006.01); F16L 11/12 (2006.01); F16L 11/08 (2006.01)
CPC F16L 11/124 (2013.01) [F16L 57/06 (2013.01); F16L 11/081 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A rubber hose comprising a distinctly colored inner wear indicator integrated into a liner of the rubber hose, wherein the inner wear indicator is disposed at a distance (b) of the from an inner surface of the liner, wherein (b) is less than 40% of thickness (v) of the liner, and wherein height (h) of the wear indicator, measured perpendicularly to a longitudinal axis of the hose, falls between 1% to 90% of liner thickness (v); and
wherein the inner wear indicator has a profile applied in a spiral and has a triangular cross-section.