초록 ▼

An airtight spa cover (11) supported by air generated by the spa pump and the spa blower (29). The cover is attached to the external periphery of the spa walls (17) and includes a skirt (29) that extends into the spa water (35), adjacent to the internal periphery of the spa walls (17). The pressure

An airtight spa cover (11) supported by air generated by the spa pump and the spa blower (29). The cover is attached to the external periphery of the spa walls (17) and includes a skirt (29) that extends into the spa water (35), adjacent to the internal periphery of the spa walls (17). The pressure of the air trapped between the skirt (24), the surface (33) of the water, and the overlaying portion of the cover (11) is adequate to support an adult. The attachment mechanism is designed to prevent unauthorized entry when the spa cover is pressurized. The spa cover (11) includes an air ventilation pipe (49) whose lower end, initially, lies beneath the surface (33) of the spa water (35). As the pressure rises, the lower end rises above the surface of this spa water allowing trapped air to escape. The cover rises and falls until a pressure balance is achieved. The spa cover is deflated by raising a pressure release pipe (59) to allow the air trapped in a dead air space (37) to escape.

대표청구항 ▼

A self-inflating air tight cover for a spa comprising: an outer sheet formed of an air impermeable material sized to cover a spa; a skirt affixed to and hanging downwardly from said outer sheet when said outer sheet is positioned atop a spa filled with water, the vertical height of said skirt being

A self-inflating air tight cover for a spa comprising: an outer sheet formed of an air impermeable material sized to cover a spa; a skirt affixed to and hanging downwardly from said outer sheet when said outer sheet is positioned atop a spa filled with water, the vertical height of said skirt being such that the lower end of said skirt enters the water in said spa when said outer sheet is positioned atop a spa; attachment means for attaching said outer sheet to a spa such that, once that outer sheet is attached to said spa and the lower end of said skin enters said spa water, a dead air space is created between said outer sheet and said spa water that traps air introduced into said spa water by the ventilation system that forms part of said spa, said trapped air causing said outer sheet to rise; height control means for automatically releasing air from said dead air space when the trapped air in said dead air space causes said outer sheet to rise a predetermined distance above the level of the water in said spa regardless of the magnitude of the pressure of said trapped air in said dead air space; and manually actuable pressure release means for releasing trapped air from said dead air space.