US3138889A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Auxiliary gun barrel
Assignee: Poly Choke Co Inc
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Filing: 1962-11-15
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Granted: 1964-06-30
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Expires: 1982-11-15
Abstract
No abstract record available.
Inventors
- 👤 Lauren F Groover
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 20:30
CPC Classifications
F; F41; F41A; F41A21/00; F41A21/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
202 words
IN COMBINATION WITH A BREECH-LOADING SHOTGUN, AN AUXILIARY BARREL ADAPTED TO BE INSERTED WITHIN THE GUN BARREL CONSISTING OF AN ELONGATED TUBULAR MEMBER HAVING A REAR PORTION AND A FORWARD PORTION INTERCONNECTED BY AN INTERMEDIATE PORTION OF REDUCED CROSS-SECTIONAL SIZE, SAID REAR PORTION HAVING AN OUTER DIAMETER OF SUCH DIMENSIONS THAT IT FITS SNUGLY WITHIN THE SHELL CHAMBER OF THE GUN BARREL, SAID FORWARD PORTION HAVING AN ENLARGED ANNULAR FORWARDLY TAPERED PORTION ARRANGED AT A SPACED DISTANCE FROM THE FORWARD END OF SAID TUBULAR MEMBER HAVING AN OUTER DIAMETER SLIGHTLY LESS THAN THE INNER DIAMETER OF THE GUN BARREL, SAID FORWARD PORTION BEING EXTERIORLY THREADED FROM A POINT ADJACENT THE FORWARD END OF SAID TUBULAR MEMBER TO A POINT ADJACENT SAID ANNULAR TAPERED PORTION, AND AN ELONGATED ADJUSTABLE SLEEVE BEING SO CONSTRUCTED AND ARRANGED THAT IT WILL EXPAND, SAID SLEEVE BEING INTERNALLY THREADED, WHICH THREADS COOPERATE WITH THE THREADS ON THE FORWARD PORTION OF SAID TUBULAR MEMBER WHEREBY THE OUTER DIAMETER OF SAID SLEEVE IS INCREASED WHEN THE SLEEVE IS SCREWED ON THE FORWARD END OF SAID TUBULAR MEMBER SO THAT THE OUTER SIDES OF SAID SLEEVE ARE FORCED RADIALLY OUTWARDLY AGAINST THE INNER WALL OF THE BORE OF THE GUN BARREL.
Claim 2
Dependent Claim
202 words
IN COMBINATION WITH A BREECH-LOADING SHOTGUN, AN AUXILIARY BARREL ADAPTED TO BE INSERTED WITHIN THE GUN BARREL CONSISTING OF AN ELONGATED TUBULAR MEMBER HAVING A REAR PORTION AND A FORWARD PORTION INTERCONNECTED BY AN INTERMEDIATE PORTION OF REDUCED CROSS-SECTIONAL SIZE, SAID REAR PORTION HAVING AN OUTER DIAMETER OF SUCH DIMENSIONS THAT IT FITS SNUGLY WITHIN THE SHELL CHAMBER OF THE GUN BARREL, SAID FORWARD PORTION HAVING AN ENLARGED ANNULAR FORWARDLY TAPERED PORTION ARRANGED AT A SPACED DISTANCE FROM THE FORWARD END OF SAID TUBULAR MEMBER HAVING AN OUTER DIAMETER SLIGHTLY LESS THAN THE INNER DIAMETER OF THE GUN BARREL, SAID FORWARD PORTION BEING EXTERIORLY THREADED FROM A POINT ADJACENT THE FORWARD END OF SAID TUBULAR MEMBER TO A POINT ADJACENT SAID ANNULAR TAPERED PORTION, AND AN ELONGATED ADJUSTABLE SLEEVE BEING SO CONSTRUCTED AND ARRANGED THAT IT WILL EXPAND, SAID SLEEVE BEING INTERNALLY THREADED, WHICH THREADS COOPERATE WITH THE THREADS ON THE FORWARD PORTION OF SAID TUBULAR MEMBER WHEREBY THE OUTER DIAMETER OF SAID SLEEVE IS INCREASED WHEN THE SLEEVE IS SCREWED ON THE FORWARD END OF SAID TUBULAR MEMBER SO THAT THE OUTER SIDES OF SAID SLEEVE ARE FORCED RADIALLY OUTWARDLY AGAINST THE INNER WALL OF THE BORE OF THE GUN BARREL.
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |