US 11,655,927 B2
Apparatus and methods for internal sealing of pipe systems
Peter Blais, Cincinnati, OH (US); and Michael Fox, Cincinnati, OH (US)
Assigned to HydraTech Engineered Products, LLC, Cincinnati, OH (US)
Filed by HydraTech Engineered Products, LLC, Cincinnati, OH (US)
Filed on Jun. 14, 2021, as Appl. No. 17/346,926.
Prior Publication US 2022/0397223 A1, Dec. 15, 2022
Int. Cl. F16L 55/163 (2006.01)
CPC F16L 55/163 (2013.01) 13 Claims
OG exemplary drawing
1. An expandable pipe seal, comprising:
an expandable sleeve, the sleeve formed from sheet material rolled into a cylindrical shape such that a first longitudinal edge of the sheet overlaps a second longitudinal edge of the sheet in a circumferential direction of the sleeve, the sleeve having first and second axial ends;
the sleeve expandable from a first, compact configuration to a second, expanded configuration having a larger outer diameter than the first configuration;
at least one first locking structure on the sleeve, the first locking structure comprising an elongate slot adjacent an axial end of the sleeve and extending in a circumferential direction from the second longitudinal edge toward the first longitudinal edge, the slot defining first and second oppositely disposed sides, each side of the slot including a plurality of detent features; and
at least one second locking structure coupled proximate the first longitudinal edge of the rolled sheet and cooperating with the first locking structure to maintain the sleeve in the second, expanded configuration;
the second locking structure comprising a spring member formed into a V-shape and having first and second spaced apart terminal ends;
the first and second terminal ends of the spring member operatively engaging the detent features of the first locking structure such that the spring member deforms to facilitate expansion of the sleeve from the first configuration toward the second configuration, and the terminal ends of the spring member engage the detent features to prevent movement of the sleeve in a direction toward the first configuration;
wherein the second locking structure further comprises:
a carrier, and
spring capture structure on the carrier, the spring capture structure configured to receive and position the spring member for engagement with the first locking structure;
wherein the spring capture structure comprises a plurality of pins coupled with the carrier; and
wherein the spring member is positioned on the carrier for engagement with the pins.