US3746334A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Practice javelin
Assignee: Individual
•
Filing: 1971-09-03
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Granted: 1973-07-17
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Expires: 1991-09-03
Abstract
Abstract A javelin for practice throwing indoors having drag inducing members adjacent its ends which react with the air-stream to limit the javelin''s travel. The drag inducing members are preferably of conical shape, apertured to provide the drag desired without causing unstability of the javelin in flight. The javelin additionally includes a blunt resilient impact member at the javelin''s forward end to prevent damage to floor or wall surfaces.
Inventors
- 👤 J Stubblefield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 08:19
CPC Classifications
A; A63; A63B; A63B65/00; A63B65/02; A63B21/00; A63B21/008; A63B21/0085; A63B21/0088; A63B69/00
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
98 words
A practice javelin having certain characteristics of a conventional javelin for the training of a javelin thrower within an area of restricted size, said practice javelin comprising, a main elongate body having a handgrip thereon approximately at the javelin''s center of gravity, a resilient impact member of rounded configuration affixed to the forward end of said elongate body, and cone shaped members for inducing drag located both forwardly and rearwardly of the javelin''s handgrip, the forward cone shaped member being of a configuration inducing lesser aerodynamic drag than the rearward cone shaped member for purposes of dynamic stability.
Claim 2
Dependent Claim
98 words
A practice javelin having certain characteristics of a conventional javelin for the training of a javelin thrower within an area of restricted size, said practice javelin comprising, a main elongate body having a handgrip thereon approximately at the javelin''s center of gravity, a resilient impact member of rounded configuration affixed to the forward end of said elongate body, and cone shaped members for inducing drag located both forwardly and rearwardly of the javelin''s handgrip, the forward cone shaped member being of a configuration inducing lesser aerodynamic drag than the rearward cone shaped member for purposes of dynamic stability.
Claim 3
Dependent Claim
25 words
A practice javelin as claimed in claim 1 wherein said cone shaped members include collar portions removably mounted to said main body for replacement purposes.
Claim 4
Dependent Claim
110 words
A practice javelin having certain characteristics of a conventional javelin for the training of a javelin thrower within an area of restricted size, said practice javelin comprising, a main elongate body have a handgrip thereon approximately at the javelin''s center of gravity, a resilient impact member of rounded configuration affixed to the forward end of said elongate body, and disc shaped members for inducing drag located both forwardly and rearwardly of the javelin''s handgrip, the forward disc shaped member having less surface area than the rearward disc shaped member whereby the forward disc shaped member induces lesser aerodynamic drag than the rearward disc shaped member for purposes of dynamic stability.
Claim 5
Dependent Claim
110 words
A practice javelin having certain characteristics of a conventional javelin for the training of a javelin thrower within an area of restricted size, said practice javelin comprising, a main elongate body have a handgrip thereon approximately at the javelin''s center of gravity, a resilient impact member of rounded configuration affixed to the forward end of said elongate body, and disc shaped members for inducing drag located both forwardly and rearwardly of the javelin''s handgrip, the forward disc shaped member having less surface area than the rearward disc shaped member whereby the forward disc shaped member induces lesser aerodynamic drag than the rearward disc shaped member for purposes of dynamic stability.
Claim 6
Dependent Claim
25 words
A practice javelin as claimed in claim 3 wherein said disc shaped members include collar portions removably mounted to said main body for replacement purposes.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |