Patent US3578682A successfully refreshed from Google Patents.
US4151674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flying cylinder
Assignee: Individual
•
Filing: 1976-06-14
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Granted: 1979-05-01
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Expires: 1996-06-14
Abstract
Abstract An improved flying cylinder and method of constructing the cylinder is disclosed. The cylinder includes a hollow cylindrical body having a leading end and a trailing end, the center of gravity of the cylindrical body being located relatively toward the leading end. The cylinder is adapted to be propelled through the air with axial spin. A boundary layer tripping mechanism is located circumferentially around the exterior surface of the leading end of the cylindrical body. This mechanism provides the cylinder with a turbulent boundary layer as it is propelled through the air to reduce drag and improve the flying characteristics of the cylinder.
Inventors
- 👤 Dale H. Klahn
- 👤 Gary L. Upham
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 01:08
CPC Classifications
A; A63; A63H; A63H33/00; A63H33/18
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
127 words
A flying mechanism comprising: a hollow cylinder constructed of two pieces of thin sheet material and having a leading end and a trailing end, said cylinder including a cylindrical body constructed of one of the pieces of sheet material, said one piece having an outwardly and rearwardly directed curl at the leading end of the cylinder, the other said piece of sheet material being interleaved with and at least partially circumscribing the curl of the first piece to provide a weight at the leading end of the cylinder and to provide a rearwardly directed ledge at said leading end to provide the cylinder with a turbulent boundary layer as the cylinder is propelled through the air to reduce drag and enhance the flying characteristics of said cylinder.
Claim 2
Dependent Claim
127 words
A flying mechanism comprising: a hollow cylinder constructed of two pieces of thin sheet material and having a leading end and a trailing end, said cylinder including a cylindrical body constructed of one of the pieces of sheet material, said one piece having an outwardly and rearwardly directed curl at the leading end of the cylinder, the other said piece of sheet material being interleaved with and at least partially circumscribing the curl of the first piece to provide a weight at the leading end of the cylinder and to provide a rearwardly directed ledge at said leading end to provide the cylinder with a turbulent boundary layer as the cylinder is propelled through the air to reduce drag and enhance the flying characteristics of said cylinder.
Claim 3
Dependent Claim
17 words
A flying mechanism as recited in claim 1 wherein said pieces of thin sheet material comprise aluminum.
Claim 4
Dependent Claim
36 words
A flying mechanism as recited in claim 1 and additionally comprising a plurality of apertures disposed about the circumference of the leading end of the cylinder body to further enhance the flying characteristics of the cylinder.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-04-30 | 1982-10-30 | 1983-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-04-30 | 1986-10-30 | 1987-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-04-30 | 1990-10-30 | 1991-05-01 | $7700.00 | Window Closed / Lapsed |