Patent US3340641A successfully refreshed from Google Patents.
US3340641A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for improving the accuracy of firearms by reducing barrel vibrations
Assignee: HELI PIC Inc
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Filing: 1964-12-15
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Granted: 1967-09-12
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Expires: 1984-12-15
Abstract
No abstract record available.
Inventors
- 👤 Kenneth H Recker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
F; F41; F41C; F41C27/00; F41C27/22
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
83 words
IN A GUN, A VIBRATORY BAR HAVING ONE END PORTION RIGIDLY ATTACHED TO THE BARREL AND OTHERWISE FREE TO VIBRATE, SAID BAR BEING DIMENSIONED AND OF A WEIGHT MASS THAT WILL BE VIBRATIONALLY RESPONSIVE TO THE VIBRATIONS OF THE BARREL DURING FIRING OF THE GUN, AND MEANS FOR TUNING SAID BAR TO BRING ITS AMPLITUDE OF VIBRATION INTO PHASE WITH THE MAGNITUDE OF VIBRATIONS OF THE BARREL, WHEREBY THE VIBRATIONS OF THE BARREL DURING FIRING ARE TRANSFERRED AND ABSORBED BY THE VIBRATORY BAR.
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) | 1970-09-11 | 1971-03-13 | 1971-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-09-11 | 1975-03-13 | 1975-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-09-11 | 1979-03-13 | 1979-09-12 | $7700.00 | Window Closed / Lapsed |