Plastic and nonmetallic article shaping or treating: processes – Disparate treatment of article subsequent to working,... – Effecting temperature change
Patent
1995-11-07
1998-04-21
Aftergut, Karen
Plastic and nonmetallic article shaping or treating: processes
Disparate treatment of article subsequent to working,...
Effecting temperature change
264310, 264348, B29C 7100
Patent
active
057414530
ABSTRACT:
A spa having a one-piece, rotationally molded shell defining a reservoir for containing water including at least three sidewalls connected by an interior footwell, at least three exterior sidewalls, a coping interconnecting the reservoir sidewalls and the exterior sidewalls, and a floor beneath the reservoir footwell and interconnecting the exterior sidewalls. Water is circulated within the reservoir by a plumbing system which is disposed within an interior space defined between the reservoir sidewalls, the exterior sidewalls, the coping, and the floor; the plumbing system including a plurality of jets extending through the reservoir sidewalls; a plumbing harness; and a pump for circulating the water from the reservoir into the jets. It is also contemplated that a filter system and heating element may be provided and enclosed within the interior space of the spa. The one-piece, unitary spa shell construction provides several advantages over the prior spas including a portable, lightweight construction; a strong, durable polymeric frame and tub structure, which is substantially puncture proof, resistant to abrasions and scratches, and is chemically and ultra-violetly stable such that the tub may be used either indoors or outdoors and maintain a nice appearance despite exposure to the elements. Additionally, the polymeric construction of the shell provides great flexibility in spa design and color combinations, suitable for substantially all tastes and desires. A method for manufacturing a one-piece rotationally molded spa is also provided generally including the steps of providing a mold with a cavity, introducing a powdered polymeric material into the mold cavity, molding the polymeric material into the shape of a spa, removing the spa from the mold and placing the molded spa in a cooling fixture to produce a memory in the polymeric material.
REFERENCES:
patent: 3914361 (1975-10-01), Shiina et al.
patent: 4651538 (1987-03-01), Bull et al.
patent: 5172433 (1992-12-01), Lake
patent: 5236581 (1993-08-01), Perry
patent: 5494718 (1996-02-01), Adams et al.
Aftergut Karen
Emerald Spa Corporation
LandOfFree
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