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METHOD AND APPARATUS OF COLLECTING RAINWATER

  • US 3,730,120 A
  • Filed: 03/01/1971
  • Issued: 05/01/1973
  • Est. Priority Date: 03/01/1971
  • Status: Expired due to Term
First Claim
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1. A unit for collecting rainwater comprising a collecting vessel, a deck covering substantially the whole superficial area occurpied by the vessel and closing the mouth thereof and a buoyancy means for supporting said collecting vessel and deck, the surface of the deck sloping inwardly to at least one orifice through which rainwater falling on the deck may enter the vessel, and the wall of the collecting vessel below said deck being free from openings to atmosphere, the whole of said wall of the collecting vessel below said deck being impermeable to the passage of water, whereby substantially the whole volume enclosed by the collecting vessel and deck are available for collection of rainwater, each orifice in said deck having a non-return valve openable by the pressure of the overlying rainwater to allow passage thereof into the collecting vessel, said valve being normally closed to prevent emission of water vapor and thus minimize evaporation loss of water collected in the vessel.

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