Patent US3321787A successfully refreshed from Google Patents.
US3321787A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Swimming pool cleaning means
Assignee: AQUA-VAC SYSTEMS Inc A CORP OF
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Filing: 1964-12-17
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Granted: 1967-05-30
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Expires: 1984-12-17
Abstract
No abstract record available.
Inventors
- 👤 Robert R Myers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:27
CPC Classifications
A; A47; A47L; A47L11/00; A47L11/40; A47L11/4036; A47L11/4038; A47L11/4063; A47L11/4069; A47L11/4072; B; B63; B63B; B63B59/00; B63B59/06; B63B59/08; E; E04; E04H; E04H4/00; E04H4/14; E04H4/16; E04H4/1654
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
117 words
A SUBMARINE CLEANER INCLUDING A CHASSIS ADAPTED TO BE SUBMERGED BENEATH THE LIQUID IN A TANK FOR CLEANING THE BOTTOM SURFACE OF THE TANK, SAID CLEANER COMPRISING, TWO ROTATABLY MOUNTED BRUSHES OPERATIVELY CONNECTED TO SAID CHASSIS, MEANS FOR ROTATING SAID BRUSHES, SAID ROTATABLE BRUSHES BEING IN ENGAGEMENT WITH THE BOTTOM SURFACE OF THE TANK FOR CLEANING SAID BOTTOM SURFACE AND DRIVING SAID CLEANER OVER SAID BOTTOM SURFACE, SAID ROTATABLE BRUSHES BEING THE ONLY POWERED DRIVE MEANS IN CONTACT WITH THE BOTTOM SURFACE OF SAID TANK, AND MEANS FOR REMOVING FOREIGN MATTER AGITATED BY SAID BRUSHES; ONE OF SAID BRUSHES HAVING AN AXIS AT AN ANGLE DIFFERENT THAN THAT OF THE ANGLE OF AXIS OF SAID OTHER BRUSH.
Claim 2
Dependent Claim
117 words
A SUBMARINE CLEANER INCLUDING A CHASSIS ADAPTED TO BE SUBMERGED BENEATH THE LIQUID IN A TANK FOR CLEANING THE BOTTOM SURFACE OF THE TANK, SAID CLEANER COMPRISING, TWO ROTATABLY MOUNTED BRUSHES OPERATIVELY CONNECTED TO SAID CHASSIS, MEANS FOR ROTATING SAID BRUSHES, SAID ROTATABLE BRUSHES BEING IN ENGAGEMENT WITH THE BOTTOM SURFACE OF THE TANK FOR CLEANING SAID BOTTOM SURFACE AND DRIVING SAID CLEANER OVER SAID BOTTOM SURFACE, SAID ROTATABLE BRUSHES BEING THE ONLY POWERED DRIVE MEANS IN CONTACT WITH THE BOTTOM SURFACE OF SAID TANK, AND MEANS FOR REMOVING FOREIGN MATTER AGITATED BY SAID BRUSHES; ONE OF SAID BRUSHES HAVING AN AXIS AT AN ANGLE DIFFERENT THAN THAT OF THE ANGLE OF AXIS OF SAID OTHER BRUSH.
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-29 | 1970-11-28 | 1971-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-29 | 1974-11-28 | 1975-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-29 | 1978-11-28 | 1979-05-30 | $7700.00 | Window Closed / Lapsed |