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US 4,650,138 AGranted
Cascaded micro-groove aerodynamic drag reducer
AssigneeInterNorth, Inc.
InventorRonald D. Grose
Life of this patent
Estimating the term…
Abstract
A cascaded micro-groove aerodynamic drag reducer is provided by creating a plurality of spaced-apart, microscopic grooves in the aerodynamic surface. Each of the grooves is defined by oppositely disposed side walls with each of the side walls of each groove having at least one catenary shaped surface provided thereon. In the preferred embodiment, each of the side walls is provided with a plurality of catenary shaped surfaces with each of the catenary shaped surfaces having a plurality of smaller catenary surfaces provided thereon.
Claims4
In an aerodynamic surface,
- said surface having a plurality of spaced-apart microscopic grooves formed therein which are parallel to the mean flow direction,
- each of said grooves being defined by oppositely disposed side walls,
- each of said side walls of each of said grooves having a plurality of catenary shaped surfaces provided thereon.
In an aerodynamic surface,
- said surface having a plurality of spaced-apart microscopic grooves formed therein which are parallel to the mean flow direction,
- each of said grooves being defined by oppositely disposed side walls,
- each of said side walls of each of said grooves having at least one catenary shaped surface provided thereon,
- said catenary shaped surface having a plurality of smaller catenary shaped surfaces provided thereon.
1 more element
Dependencies are inferred from the claim text.