Baths – closets – sinks – and spittoons – Tubs – Means for agitating or circulating water in a tub
Reexamination Certificate
2001-05-04
2002-03-19
Huson, Gregory (Department: 3751)
Baths, closets, sinks, and spittoons
Tubs
Means for agitating or circulating water in a tub
C004S541300, C004S541400, C004S541500, C601S157000, C210S764000
Reexamination Certificate
active
06357060
ABSTRACT:
TECHNICAL FIELD OF THE INVENTION
The present invention relates generally to whirlpools and spas, and, more particularly, to a method and apparatus for purging standing water from the water lines, fixtures, and jet manifolds during draining of the whirlpool or spa vessel.
BACKGROUND OF THE INVENTION
A whirlpool bath or spa typically includes a tub in which the water is circulated around the bather to provide a relaxing and therapeutic environment. Whirlpool baths generally accomplish this through the use of a hydraulic pump to circulate water from the interior of the bathtub through plumbing located on the exterior of the bathtub and back into the tub through a plurality of nozzles. Whirlpool baths can be commonly found in homes, health clubs, hospitals, and rehabilitation centers.
One concern currently receiving some attention regarding the safety of whirlpool baths relates to sanitation. Specifically, there is a concern that it is difficult to completely drain all of the water from the whirlpool circulation plumbing, resulting in an environment conducive to the growth of bacteria and fungi. Since the plumbing is principally located outside of the bathtub (and is usually covered), the plumbing is generally inaccessible without undertaking the major effort of disassembling and removing the tub itself. The inaccessibility of the plumbing makes it nearly impossible to prevent standing water from being left therein after each use of the whirlpool bath. This is a problem because the standing water typically includes residual soap scum, scale deposits, sloughed off skin cells, body oils and other fluids, fecal matter, and other bathing residue. The plumbing therefore provides a dark, warm, and moist environment in which bacteria and fungi may thrive.
One recent study conducted by Dr. Rita Moyes of the Texas A&M University Department of Biology indicates that in addition to fungi, enteric organisms (Enterobacteriaceae), Pseudomonas sp., Legionella sp. (the causative agent of Legionnaire's disease and Pontiac fever) and Staphylococcus aureus may be found in such systems. “Microbial Loads in Whirlpool Bathtubs: An Emerging Health Risk”, Moyes, unpublished report. According to Dr. Moyes, these bacteria cause 30-35% of all septicemias, more than 70% of all urinary tract infections, impetigo, folliculitis, and carbuncles and have been implicated in infections of the respiratory tract, burn wounds, ears, eyes, and intestines. Id. S. aureus is an etiological agent for bacteremia, endocarditis, pneumonia, empyema, osteomyletis, and septic arthritis and also releases a toxin responsible for scalded skin syndrome, toxic shock syndrome, and food poisoning. Id.
One method known in the art of sanitizing a whirlpool bathtub is to drain and clean the circulation plumbing. However, complete draining of conventional whirlpools can only be accomplished through their disassembly. Alternately, sanitation of whirlpool plumbing has been attempted through the circulation of cleaning fluids therethrough, but this technique is largely ineffective without the use of expensive specialized equipment to heat, convey and concentrate special cleaning solutions therethrough. The simple addition of disinfectants or cleaning solutions to the water in the tub and the subsequent circulation of the water through the plumbing by actuation of the circulation pump has only a marginal effect on disinfecting the residual water left therein.
Obviously, it would be desirable to eliminate standing dirty water in whirlpool plumbing as a possible source of disease to the bather. The present invention is directed toward achieving this goal.
SUMMARY OF THE INVENTION
The present invention relates to a method and apparatus for purifying and removing standing water from the plumbing in a whirlpool bath. One form of the present invention is a pneumatic pump fluidically coupled to the pipes and nozzles of the hydraulic piping of a whirlpool bath and adapted to flush standing water out of the hydraulic plumbing after each use of the bath. An ozone source is fluidically connected to the pneumatic pump. The pneumatic plumbing is positioned substantially above the maximum water level allowed in the tub and substantially above the hydraulic plumbing and is connected in fluidic communication with different portions of the hydraulic plumbing, such that activation of the pneumatic pump after the tub has been substantially drained blows ozonated air through the hydraulic plumbing, purifying the residual water therein and forcing the purified water from the hydraulic plumbing. The ozonated air also disinfects the hydraulic plumbing.
One object of the present invention is to provide an improved whirlpool bath system. Related objects and advantages of the present invention will be apparent from the following description.
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Royal Spa Product Brochure, Royal Spa Manufacturing, 2041 West Epler Avenue, Indianapolis, Indiana 46217.
Brochure circa Nov. 1998 showing whirlpool bathtub systems featuring aerated water jet nozzles.
Huson Gregory
Nguyen Tuan
Woodard Emhardt Naughton Moriarty & McNett
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