US3565434A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boomerang with adjustable-pitch blades
Assignee: Individual
•
Filing: 1969-07-10
•
Granted: 1971-02-23
•
Expires: 1989-07-10
Abstract
Abstract A malleable wire is moulded in the plastic blades of a boomerang along the neutral axis thereof. Twisting of the blades to exceed the yield point of the wire enables adjustment of the relative tilt of the blades. The blade ends are formed with weightreceiving pockets.
Inventors
- 👤 James F Liston
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 21:51
CPC Classifications
A; A63; A63B; A63B65/00; A63B65/08; A63B2208/00; A63B2208/12; Y; Y10; Y10S; Y10S273/00; Y10S273/04
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
100 words
A boomerang comprising a plurality of flexible blades arranged about a mutual center, a permanently deformable element extending between the blades, through the center, whereby twisting of the blades may permanently deform the structural element to adjust the tilt of the blades, a solid center Section (3) at the mutual center, the blades extending out from said center section and including solid sections (4) at their extremities and a skin (6) covering and attached to said solid sections (3 and 4), the deformable structural element comprising a wire frame (5) embedded in said solid sections and covered by said skin.
Claim 2
Dependent Claim
100 words
A boomerang comprising a plurality of flexible blades arranged about a mutual center, a permanently deformable element extending between the blades, through the center, whereby twisting of the blades may permanently deform the structural element to adjust the tilt of the blades, a solid center Section (3) at the mutual center, the blades extending out from said center section and including solid sections (4) at their extremities and a skin (6) covering and attached to said solid sections (3 and 4), the deformable structural element comprising a wire frame (5) embedded in said solid sections and covered by said skin.
Claim 3
Dependent Claim
36 words
A boomerang as claimed in claim 1, including weight-receiving wells formed in solid sections (4), at the blade extremities said skin (6) having slits (8) contiguous to said wells whereby weights may be inserted and removed.
Claim 4
Dependent Claim
77 words
A boomerang comprising: a plurality of soft resilient blades arranged about a common center; a permanently deformable structural element extending between the blades, through the center, whereby twisting of the blades may permanently deform the structural element to adjust the tilt of the blades; and said deformable element being a single wire (10) having looped ends (9), said blades being integrally connected at their common center, said wire following substantially along the neutral axis of said blades.
Claim 5
Dependent Claim
77 words
A boomerang comprising: a plurality of soft resilient blades arranged about a common center; a permanently deformable structural element extending between the blades, through the center, whereby twisting of the blades may permanently deform the structural element to adjust the tilt of the blades; and said deformable element being a single wire (10) having looped ends (9), said blades being integrally connected at their common center, said wire following substantially along the neutral axis of said blades.
References Cited (Backward Citations)
US510290A
Cited
US1413316A
Cited
US2035629A
Cited
US2324022A
Cited
FR1235113A
Cited
US3284927A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |