Amusement devices: toys – Aquatic – Boat
Patent
1988-12-12
1990-04-24
Hafer, Robert A.
Amusement devices: toys
Aquatic
Boat
446155, 446164, 446211, 114333, A63H 2304, A63H 2706, B63G 822
Patent
active
049196375
ABSTRACT:
A model submarine has an inherent "fail safe" feature, so that the submarine (if submerged) will rise to its periscope depth in the event the submarine encounters a stationary object, or in the event a power failure occurs. Power is supplied by a single submersible motor-pump unit within a free-flooding hull. The motor-pump unit supplies a pressurized water discharge for, first, forward propulsion of the submarine via the discharge nozzle of an ejector pump; and second, for hydraulic control of the diving and steering maneuvers. The ejector pump has a venturi for aspirating fluid out of the ballast tank. An automatic depth control feature assures that the submarine will level off to a desired predetermined depth when a diving command signal is given; and the desired predetermined depth is adjustable. The model submarine simulates its real-life counterpart, may be enjoyed by the sophisticated hobbyist as well as by the novice, and may be manufactured easily and economically (either fully assembled or in the kit form) for widespread marketing and distribution.
REFERENCES:
patent: 1318623 (1919-10-01), Wall
patent: 2506281 (1950-05-01), Sabini
patent: 3046697 (1962-07-01), Pullen
patent: 3157145 (1964-11-01), Farris et al.
patent: 3307290 (1967-03-01), Pederson
patent: 3619938 (1971-11-01), Tong
patent: 3952349 (1976-04-01), Erath et al.
patent: 4241535 (1980-12-01), Tsukuda
Bloom Leonard
Hafer Robert A.
Leonard Bloom
Muir D. Neal
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