Ships – Torpedo launching
Patent
1990-06-18
1991-04-02
Brown, David H.
Ships
Torpedo launching
89 1810, 114319, B63G 828, F41F 310
Patent
active
050039091
ABSTRACT:
A bimodal flow restriction device having an open condition and a closed cition is disclosed. In its open condition, an annular fluid flow path defined between a torpedo enclosed within a larger torpedo tube is open to support a torpedo launch in a swim-out mode. In order to facilitate a swim-out launch, water must flow from the forward portion of the torpedo, along its body and into its propeller. In its closed condition, the annular fluid flow path defined between the torpedo enclosed within the larger torpedo tube is closed-off to enable torpedo launch in a pump-ejection mode. In the preferred embodiment, plural, cooperative elbows are disposed about an inside circumference of the torpedo tube, and are radially movable between a closed condition, where they provide an annular impediment in the annular fluid flow path to enable operation in the pump-ejection mode, and an open condition, where the annular fluid flow path is open, to enable operation in the swim-out mode. Each of the radially-movable cooperative elbows is preferably keystone-shaped, and includes rubber or other elastomeric bumper members to provide low-noise operation.
REFERENCES:
patent: 3180222 (1965-04-01), Moy
patent: 3364896 (1968-01-01), Hedenberg
patent: 3516380 (1970-06-01), Johnston
patent: 3857321 (1974-12-01), Cohen
patent: 4523538 (1985-06-01), Hollmann et al.
patent: 4854260 (1989-08-01), Woidich et al.
Brown David H.
Lall Prithvi C.
McGowan Michael J.
The United States of America as represented by the Secretary of
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