Ships – Building – Antifriction surfaces
Patent
1979-08-20
1982-09-21
Halvosa, George E. A.
Ships
Building
Antifriction surfaces
180117, 180121, B63B 138
Patent
active
043501079
ABSTRACT:
A water borne air cushion vehicle having a flat rigid upper rectangular sheet-like platform, and a plurality of flat rigid longitudinal walls attached substantially at right angles thereto and depending therefrom substantially parallel with the major axis of the platform. Two of the walls are disposed as side walls along respective edges of the platform, and a plurality of longitudinally spaced laterally aligned arrays of flexible trough-shaped skirts are looped with a space therein and fastened along the longitudinal edge of the underside of the platform flush with, but movable with respect to adjacent pairs of the walls. The skirts are extendable to a lesser depth than that of the walls, and a source of pressurized air is admitted through apertures of fixed size at a relatively high pressure to the skirts. Also, low pressure air is admitted through variable sized openings remotely controlled and located beneath the platform in communication with at least four square or rectangular open bottomed air cushion chambers disposed laterally in pairs. Each of the four square air cushion chambers are bounded by an adjacent pair of skirts and by an adjacent pair of walls, the depth of the walls and of the skirts being so related to the flow rate of air that the vehicle is buoyant upon water. The walls protrude into the water sufficiently to prevent air spillage when the vehicle is urged longitudinally through the water by a propulsion system. The skirt air inlet openings are adapted to readmit by reverse flow at least part of the compressed air in any one of the skirts independently in response to fugitive deflection of the skirts. The skirts are bag-like structures attached along one side to the underside of the platform via a brace comprising a flexible sheet extending through the width of the skirt.
REFERENCES:
patent: 3209847 (1965-10-01), Beardsley
patent: 3371737 (1968-03-01), Hall
patent: 3397753 (1968-08-01), Hunt et al.
patent: 3478836 (1969-11-01), Eckered et al.
patent: 3532180 (1970-10-01), Ford et al.
patent: 3677361 (1972-07-01), Bertin
patent: 3850126 (1974-11-01), Leonard
patent: 4090459 (1978-05-01), Chaplin
patent: 4103755 (1978-08-01), Tattersal
patent: 4166515 (1979-09-01), Tattersal
SN. 895,592, (4/12/78), Mattox.
Halvosa George E. A.
Sotelo Jesus D.
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