US3335447A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sewage treatment system
Assignee: Smith and Loveless Inc
•
Filing: 1965-02-23
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Granted: 1967-08-15
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Ralph A Olson
- 👤 Marvin E Wood
- 👤 Thomas J Langley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:53
CPC Classifications
B; B01; B01D; B01D21/00; B01D21/02; B01D21/04; B01D21/06; B01D21/18; B01D21/24; B01D21/2427; C; C02; C02F; C02F3/00; C02F3/02; C02F3/12; Y; Y02; Y02W; Y02W10/00; Y02W10/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
169 words
IN A SEWAGE TREATMENT TANK WHEREIN SLUDGE IS DEPOSITED ON THE TANK FLOOR AND TRAVELLING MEANS ARE MOUNTED ABOVE THE FLOOR FOR ROTATION ABOUT A VERTICAL AXIS, THE IMPROVEMENT IN FLOOR SCRAPER ASSEMBLY FOR SCRAPING THE SLUDGE ON THE FLOOR TOWARD A SLUDGE TROUGH, COMPRISING: A SCRAPING UNIT MOUNTED ON SUPPORT MEANS EXTENDING UPWARDLY FROM SAID UNIT, A MOUNTING ASSEMBLY FOR SECURING SAID SUPPORT MEANS TO THE TRAVELLING MEANS, SAID MOUNTING ASSEMBLY INCLUDING STRUCTURAL MEANS DEFINING VERITCALLY DISPOSED SLOT MEANS ON ONE OF SAID SUPPORT MEANS AND SAID TRAVELLING MEANS, SHEAR PIN MEANS SECURED TO THE OTHER OF SAID SUPPORT MEANS AND SAID TRAVELLING MEANS AND SEATED IN SAID SLOT MEANS, AND BEARING MEANS BELOW SAID SLOT MEANS AGAINST WHICH SAID SUPPORT MEANS BEARS AS THE TRAVELLING MEANS ROTATES AND SAID SCRAPING UNIT SCRAPES SLUDGE ON THE TANK FLOOR TOWARD THE SLUDGE TROUGH, SAID SHEAR PIN MEANS BEING OF PREDETERMINED STRENGTH CALCULATED TO FAIL WHEN SAID SCRAPING UNIT ENCOUNTERS EXCESSIVE RESISTANCE AS IT SCRAPES SLUDGE ON THE TANK FLOOR.
Claim 2
Dependent Claim
169 words
IN A SEWAGE TREATMENT TANK WHEREIN SLUDGE IS DEPOSITED ON THE TANK FLOOR AND TRAVELLING MEANS ARE MOUNTED ABOVE THE FLOOR FOR ROTATION ABOUT A VERTICAL AXIS, THE IMPROVEMENT IN FLOOR SCRAPER ASSEMBLY FOR SCRAPING THE SLUDGE ON THE FLOOR TOWARD A SLUDGE TROUGH, COMPRISING: A SCRAPING UNIT MOUNTED ON SUPPORT MEANS EXTENDING UPWARDLY FROM SAID UNIT, A MOUNTING ASSEMBLY FOR SECURING SAID SUPPORT MEANS TO THE TRAVELLING MEANS, SAID MOUNTING ASSEMBLY INCLUDING STRUCTURAL MEANS DEFINING VERITCALLY DISPOSED SLOT MEANS ON ONE OF SAID SUPPORT MEANS AND SAID TRAVELLING MEANS, SHEAR PIN MEANS SECURED TO THE OTHER OF SAID SUPPORT MEANS AND SAID TRAVELLING MEANS AND SEATED IN SAID SLOT MEANS, AND BEARING MEANS BELOW SAID SLOT MEANS AGAINST WHICH SAID SUPPORT MEANS BEARS AS THE TRAVELLING MEANS ROTATES AND SAID SCRAPING UNIT SCRAPES SLUDGE ON THE TANK FLOOR TOWARD THE SLUDGE TROUGH, SAID SHEAR PIN MEANS BEING OF PREDETERMINED STRENGTH CALCULATED TO FAIL WHEN SAID SCRAPING UNIT ENCOUNTERS EXCESSIVE RESISTANCE AS IT SCRAPES SLUDGE ON THE TANK FLOOR.
References Cited (Backward Citations)
US3156939A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-08-14 | 1971-02-13 | 1971-08-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-08-14 | 1975-02-13 | 1975-08-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-08-14 | 1979-02-13 | 1979-08-15 | $7700.00 | Window Closed / Lapsed |