Ships – Building – Canal and ferry boats
Patent
1979-07-06
1981-06-09
Blix, Trygve M.
Ships
Building
Canal and ferry boats
114 20R, 114 54, 152397, B63B 2152, B63B 5102
Patent
active
042715520
ABSTRACT:
A torpedo recovery system including an expandable sleeve surrounding a portion of the torpedo. Upon activation of the recovery system gas is introduced into the sleeve, causing it to expand. The sleeve is clamped firmly at two distinct longitudinal positions along the torpedo and is releasably clamped at a third longitudinal position. When the differential pressure between gas inside of the sleeve and water outside the sleeve reaches a predetermined threshold level, the releasable clamp releases the sleeve allowing it to gradually expand to form a doughnut-shaped floatation collar. The expanding sleeve provides gradually increasing drag to slow the torpedo and then positive buoyancy for lifting it to the water's surface.
REFERENCES:
patent: 1998805 (1935-04-01), Driggs
patent: 3175525 (1965-03-01), DeVries
patent: 3237675 (1966-03-01), Fisher
patent: 3608510 (1971-09-01), DeVries
patent: 3648312 (1972-03-01), May
patent: 3706294 (1972-12-01), Radford
Blix Trygve M.
Keen D. W.
Presearch Incorporated
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