Buoys – rafts – and aquatic devices – Buoy – With means to call buoy to surface
Patent
1995-06-09
1996-05-14
Avila, Stephen
Buoys, rafts, and aquatic devices
Buoy
With means to call buoy to surface
441 6, 441 29, 441 30, B63B 2206
Patent
active
055163173
ABSTRACT:
Submarine (6) devices consisting of cavity to hold sand and an inflatable air bladder (10) are located beneath and connected to floating buoys (2). The weight of the sand when put inside the cavity is enough to sink buoy (2) until submarine (6) sits on the bottom of a lake or river. When bladders (10) are inflated by air supplied by an air compressor or a portable air tank, and distributed through a network of polyethylene tubing. They create enough buoyancy to offset the downward pull of the sand, thus allowing the buoys (2) to float back to the surface of the water.
REFERENCES:
patent: 1445222 (1923-02-01), Linhardt
patent: 2790186 (1957-04-01), Carapellotti
patent: 2847962 (1958-08-01), Land
patent: 3878576 (1975-04-01), Suyderhoud
patent: 4034693 (1977-07-01), Challenger
patent: 4121529 (1978-10-01), Smith et al.
patent: 4266500 (1981-05-01), Jurca
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