US3308803A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Projectile propelling device operated by compressed air
Assignee: CARL WALTHER JAGD U SPORTWAFFE
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Filing: 1964-03-10
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Granted: 1967-03-14
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Expires: 1984-03-10
Abstract
No abstract record available.
Inventors
- 👤 Walther Fritz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:43
CPC Classifications
F; F41; F41B; F41B11/00; F41B11/60; F41B11/68
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
156 words
A COMPRESSED AIR GUN HAVING A BARREL, AND AIR COMPRESSING MEANS AT THE REAR END OF THE BARREL FOR SUPPLYING COMPRESSED AIR THERETO TO DRIVE A PELLET THROUGH THE BARREL; SAID AIR COMPRESSING MEANS COMPRISING A PAIR OF CYLINDERS, PISTONS IN THE CYLINDERS INTERCONNECTED BY A BORED RIGID ROD TO MOVE SAID PISTONS IN UNISON IN THE SAME DIRECTIONS IN THEIR CYLINDERS, SAID CYLINDERS INCLUDING A SMALLER CYLINDER AND A LARGER CYLINDER, SAID SMALLER CYLINDER BEING ADJACENT SAID BARREL, A BASE IN SAID ROD FORMING A FIRST PASSAGE LEADING FROM THE LARGER CYLINDER TO THE SMALLER CYLINDER, A SECOND PASSAGE LEADING FROM SAID SMALLER CYLINDER TO SAID BARREL, A ONE-WAY VALVE IN SAID FIRST PASSAGE RESPONSIVE TO A PREDETERMINED PRESSURE IN SAID LARGER CYLINDER FOR OPENING SAID FIRST PASSAGE, AND A NORMALLY CLOSED VALVE IN SAID SECOND PASSAGE SELECTIVELY OPERABLE TO OPEN SAID SECOND PASSAGE TO RELEASE AIR COMPRESSED IN SAID SMALLER CYLINDER INTO SAID BARREL.
Claim 2
Dependent Claim
156 words
A COMPRESSED AIR GUN HAVING A BARREL, AND AIR COMPRESSING MEANS AT THE REAR END OF THE BARREL FOR SUPPLYING COMPRESSED AIR THERETO TO DRIVE A PELLET THROUGH THE BARREL; SAID AIR COMPRESSING MEANS COMPRISING A PAIR OF CYLINDERS, PISTONS IN THE CYLINDERS INTERCONNECTED BY A BORED RIGID ROD TO MOVE SAID PISTONS IN UNISON IN THE SAME DIRECTIONS IN THEIR CYLINDERS, SAID CYLINDERS INCLUDING A SMALLER CYLINDER AND A LARGER CYLINDER, SAID SMALLER CYLINDER BEING ADJACENT SAID BARREL, A BASE IN SAID ROD FORMING A FIRST PASSAGE LEADING FROM THE LARGER CYLINDER TO THE SMALLER CYLINDER, A SECOND PASSAGE LEADING FROM SAID SMALLER CYLINDER TO SAID BARREL, A ONE-WAY VALVE IN SAID FIRST PASSAGE RESPONSIVE TO A PREDETERMINED PRESSURE IN SAID LARGER CYLINDER FOR OPENING SAID FIRST PASSAGE, AND A NORMALLY CLOSED VALVE IN SAID SECOND PASSAGE SELECTIVELY OPERABLE TO OPEN SAID SECOND PASSAGE TO RELEASE AIR COMPRESSED IN SAID SMALLER CYLINDER INTO SAID BARREL.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |