US 12,329,715 B2
Spa shell reinforcement systems and methods
Robert Santos, South Jordan, UT (US); Richard Alex Eddington, South Jordan, UT (US); Evan Smail, West Jordan, UT (US); Mark McLane, Lehi, UT (US); Eric Hales, Eagle Mountain, UT (US); and Michael Adams, West Jordan, UT (US)
Assigned to Bullfrog International, LC, Herriman, UT (US)
Filed by BULLFROG INTERNATIONAL, LC, Herriman, UT (US)
Filed on Nov. 13, 2023, as Appl. No. 18/389,029.
Application 18/389,029 is a division of application No. 17/524,105, filed on Nov. 11, 2021, granted, now 11,813,226, issued on Nov. 14, 2023.
Prior Publication US 2024/0074941 A1, Mar. 7, 2024
Int. Cl. A61H 33/00 (2006.01)
CPC A61H 33/6005 (2013.01) [A61H 33/0087 (2013.01)] 9 Claims
OG exemplary drawing
 
1. A reinforcing system for a vessel that can contain water, the system comprising:
a thermoplastic shell for containing water, the shell having at least one jet predetermined location on at least one sidewall of an underside of the shell; and
a structural support layer on the underside of the shell, the structural support layer comprising:
an inner layer of rigidizer that is 0.2 centimeters to 1 centimeter thick, the inner layer comprising a layer of polyurethane;
a foam support layer that is 0.5 centimeters to 3 centimeters thick; and
an outer layer of rigidizer that is 0.25 centimeters to 1 centimeter thick,
wherein the structural support layer extends from a bottom side of the underside of the shell, across the at least one sidewall of the underside of the shell, to a lip of the spa shell, the structural support layer forming at least one rib along the sidewall of the underside of the shell.