Patent US2481839A successfully refreshed from Google Patents.
US3738657A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable hunting arrow
Assignee: Individual
•
Filing: 1972-05-09
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Granted: 1973-06-12
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Expires: 1992-05-09
Abstract
Abstract A hunting arrow has a tubular leading end portion provided with radially positioned, longitudinally extending slots. Mounted within the tubular portion are a rearwardly positioned fixed block and a forwardly positioned movable block. Blade elements comprising pivotally connected long and short sections extend between the blocks in alignment with the slots and are pivoted to the blocks, the long section being pivoted to the movable block and the short section being pivoted to the fixed block. Elastic bands are stretched between the two blocks and urge the movable block toward the fixed block. The blade elements while in longitudinal alignment tend to keep the movable block from moving. A release element is pivotally mounted to the short blade section and engages a slot in the longer blade section to keep the blade sections locked in longitudinal alignment. A projection on the release element projects outwardly of the tubular section and when engaged by the flesh of an animal upon arrow penetration releases the blade elements to be pivoted outwardly of the tubular section as the movable block moves rearwardly under the urging of the elastic bands.
Inventors
- 👤 E Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:24
CPC Classifications
F; F42; F42B; F42B6/00; F42B6/02; F42B6/08
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
160 words
A hunting arrow comprising an arrow shaft which is at least in part tubular and provided in its side wall with a plurality of circumferentially spaced longitudinal slots, fixed plug and an axially movable plug mounted within the bore of the tubular arrow shaft near said slots, plural blade units corresponding in number to said slots and each blade unit having pivotally connected sections to form a toggle joint in each unit, the ends of the blade sections of each unit pivotally connected with said plugs, resilient tensioning means interconnecting said plugs and constantly urging the movable plug toward the fixed plug, and pivoted catch elements on the blade units having tips projecting through said slots and slightly outwardly of the periphery of said arrow shaft, said catch elements and blade units having interlocking parts adapted to hold the units releasably retracted bodily inside of the arrow shaft with only the tips of the catch elements projecting radially outwardly therefrom.
Claim 2
Dependent Claim
160 words
A hunting arrow comprising an arrow shaft which is at least in part tubular and provided in its side wall with a plurality of circumferentially spaced longitudinal slots, fixed plug and an axially movable plug mounted within the bore of the tubular arrow shaft near said slots, plural blade units corresponding in number to said slots and each blade unit having pivotally connected sections to form a toggle joint in each unit, the ends of the blade sections of each unit pivotally connected with said plugs, resilient tensioning means interconnecting said plugs and constantly urging the movable plug toward the fixed plug, and pivoted catch elements on the blade units having tips projecting through said slots and slightly outwardly of the periphery of said arrow shaft, said catch elements and blade units having interlocking parts adapted to hold the units releasably retracted bodily inside of the arrow shaft with only the tips of the catch elements projecting radially outwardly therefrom.
Claim 3
Dependent Claim
47 words
The structure of claim 1, and each blade unit comprising a relatively long blade having a sharpened outer longitudinal edge and a relatively short blade, the long blade of each unit being pivoted to the movable plug and the short blade being pivoted to the fixed plug.
Claim 4
Dependent Claim
43 words
The structure of claim 2, and the long and short blades of each blade unit having longitudinally aligned pivotal connections with said plugs and having toggle joint pivots between the long and short blades which are spaced laterally outwardly of the aligned pivots.
Claim 5
Dependent Claim
38 words
The structure of claim 3, and said fixed and movable plugs having pairs of spaced flange plates on their interior opposed ends with each pair of said flange plates receiving the ends of one blade unit pivotally therebetween.
Claim 6
Dependent Claim
29 words
The structure of claim 1, and said resilient tensioning means comprising elastic bands extending between said plugs and intervened circumferentially between the blade units within the tubular arrow shaft.
Claim 7
Dependent Claim
21 words
The structure of claim 5, and attaching hook elements on said plugs engageable with the opposite ends of said elastic bands.
Claim 8
Dependent Claim
68 words
The structure of claim 1, and said interlocking parts comprising angled slots in the rear ends of the forward blade sections of said units, and angled locking fingers projecting from corresponding sides of the catch elements and adapted to enter said angled slots lockingly when the catch elements are positioned radially of the arrow shaft with their tips projecting outwardly through the longitudinal slots of the arrow shaft.
Claim 9
Dependent Claim
24 words
The structure of claim 1, and said longitudinal slots and blade units being four in number and spaced equidistantly circumferentially of the arrow shaft.
Claim 10
Dependent Claim
25 words
The structure of claim 1, and said longitudinal slots and blade units being three in number and being spaced equidistantly circumferentially of the arrow shaft.
Claim 11
Dependent Claim
29 words
The structure of claim 1, and said longitudinal slots and blade units being a pair of slots and blade units arranged at diametrically opposite points on the arrow shaft.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-11 | 1976-12-11 | 1977-06-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-11 | 1980-12-11 | 1981-06-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-11 | 1984-12-11 | 1985-06-12 | $7700.00 | Window Closed / Lapsed |