Recesses on a surface

Details Recesses on a surface Recesses on a surface

2005-04-19

2005-04-19

Avila, Stephen (Department: 3617)

Ships

Building

Antifriction surfaces

Reexamination Certificate

active

06880476

ABSTRACT:
Formations on the surface of bodies for reducing the drag relative to a medium which the body is located in or close to. The formations comprise a plurality of cavities (1,20,40,60). The surface in which the cavities are formed is closed. The cavity has a disruption edge (5,25,44,66) adjacent to the cavity, with the disruption edge located upstream of the cavity, so as to set the flowing medium most proximal to the surface into turbulence upon passing the disruption edge. The cavity has a maximum depth from the surface of at least approximately 2 mm.

REFERENCES:
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patent: 2800291 (1957-07-01), Stephens
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patent: 4753401 (1988-06-01), Bechert
patent: 5074234 (1991-12-01), Stearns, IV
patent: 5386955 (1995-02-01), Savill
patent: 5476056 (1995-12-01), Tokunaga et al.
patent: 5481996 (1996-01-01), Osawa et al.
patent: 5598990 (1997-02-01), Farokhi et al.
patent: 5988568 (1999-11-01), Drews
patent: 3534268 (1987-04-01), None
patent: 2068502 (1981-08-01), None
Norwegian Search Report dated Jun. 26, 2001of Norwegian Patent Application No. 2001 0579.

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