Aerodynamic device

Claim 2

An aerodynamic device adapted to provide an upwardly resulting force thereon through rotation of the device about a longitudinal axis thereof comprising: (a) a first disk member having a central portion and a substantially flat circular surface area whose outer boundary is defined by a predetermined radius, said central portion having an air inlet opening therethrough; (b) said first disk member having a rim circumscribing said flat circular surface area; (c) a surface of curvature extending from said boundary and curving downwardly to the point of juncture with said rim to form an upper convex surface and a lower concave surface of the first disk member; (d) a second impervious disk member spaced apart by means from said first member concave surface such that an outer periphery thereof is spaced radially inwardly of said rim defining an annular discharge aperture therebetween; (e) spacer means comprising a plurality of radially spaced impeller vanes positioned between said first disk member concave surface and said second disk member and substantially extending outwardly from said air inlet opening to said discharge aperture; said vanes defining therebetween a plurality of air passages from said air inlet opening to said air discharge aperture such that upon rotation of said device air between said first disk member and said second disk member is urged outwardly by said vanes and discharged downwardly through said air discharge aperture thereby producing a resultant upward force on said device.

Claim 3

An aerodynamic device as set forth in claim 1 wherein: (a) said opening in said first disk member is centrally of said flat circular surface and of total area as great as the total area of said discharge aperture; and (b) said vanes are generally radial and curved in the form of impeller vanes to provide a lift by drawing air into said opening and further lift by discharge of air downwardly through said discharge aperture in response to rotation of the device.

Claim 4

A device as set forth in claim 1 wherein: (a) said vanes are curved.

Claim 5

An aerodynamic device for throwing into the air with a whirling action and rotating said device about a longitudinal axis thereof comprising: (a) a generally circular first member molded of a synthetic resin and having a thickness to form a first wall, said member shaped to define a generally flat upper portion with a circular central opening therethrough, an annular peripheral rim substantially perpendicular to the plane of said flat upper portion, and a curved portion extending from said flat portion to said rim providing a generally convex outer surface and a concave inner surface on said member with the outer surface of the curved portion serving as an airfoil; (b) said rim being of a thickness greater than said first wall for increased peripheral mass and rotative inertia; (c) a second impervious wall member of synthetic resin below and spaced from said inner surface and having an outer periphery thereof spaced inwardly of said rim and cooperating therewith to define a narrow annular downwardly oriented discharge aperture therebetween; (d) a plurality of circumferentially spaced vanes extending radially substantially from said first member opening to said annular discharge aperture in the space between said inner surface and second wall member and engaged therewith to define a plurality of mutually exclusive air passages from said first member opening to said air discharge aperture; and (e) said first and second members being secured together with said vanes being responsive to rotation of said device to draw air from above said opening, to urge same through said passages and discharge same downwardly through said discharge aperture thereby generating additional lift as said device is spun through the air.

Claim 6

An aerodynamic device for throwing into the air with a whirling action and rotating said device about a longitudinal axis thereof comprising: (a) a generally circular first member molded of a synthetic resin and having a thickness to form a first wall, said member shaped to define a generally flat upper portion with a circular central opening therethrough, an annular peripheral rim substantially perpendicular to the plane of said flat upper portion, and a curved portion extending from said flat portion to said rim providing a generally convex outer surface and a concave inner surface on said member with the outer surface of the curved portion serving as an airfoil; (b) said rim being of a thickness greater than said first wall for increased peripheral mass and rotative inertia; (c) a second impervious wall member of synthetic resin below and spaced from said inner surface and having an outer periphery thereof spaced inwardly of said rim and cooperating therewith to define a narrow annular downwardly oriented discharge aperture therebetween; (d) a plurality of circumferentially spaced vanes extending radially substantially from said first member opening to said annular discharge aperture in the space between said inner surface and second wall member and engaged therewith to define a plurality of mutually exclusive air passages from said first member opening to said air discharge aperture; and (e) said first and second members being secured together with said vanes being responsive to rotation of said device to draw air from above said opening, to urge same through said passages and discharge same downwardly through said discharge aperture thereby generating additional lift as said device is spun through the air.

Claim 7

An aerodynamic device as set forth in claim 4 wherein: (a) said second wall member is a relatively flat, thin, light weight impervious member and the space between said second wall member and the first wall member progressively diminishes between said opening and the discharge aperture.

Claim 8

An aerodynamic device as set forth in claim 5 wherein: (a) said vanes are integral with said second wall member and are thin walled for lightness in weight; (b) said vanes are curved outwardly from the periphery of said opening; and (c) the first and second wall members are secured together along the engagement of the vanes with said first wall member.