Patent US3221885A successfully refreshed from Google Patents.
US3221885A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Filter apparatus
Assignee: Individual
•
Filing: 1962-01-09
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Granted: 1965-12-07
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Expires: 1982-01-09
Abstract
No abstract record available.
Inventors
- 👤 Hirs Gene
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 07:37
CPC Classifications
B; B01; B01D; B01D29/00; B01D29/09; B01D29/096
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
221 words
IN A FILTER APPARATUS FOR REMOVING CONTAMINANT PARTICLES FROM A CONTAMINATED LIQUID, A TANK STRUCTURE INCLUDING A BOTTOM WALL AND SIDE AND END WALLS SURROUNDING AN INTERIRO TANK SPACE, STATIONARY WALL MEANS INTERIORLY OF SAID SPACE AND SECURED TO SAID SIDE WALLS DEFINING A VACUUM CHAMBER HAVING AN OPEN TOP AND A BOTTOM SPACED FROM THE TANK BOTTOM WALL, MEANS FOR MAINTAINING A SUBSTANTIALLY CONSTANT BODY OF CONTAMINATED LIQUID OVER THE OPEN TOP OF SAID VACUUM CHAMBER, SAID VACUUM CHAMBER THUS BEING SEALED FROM THE ATMOSPHERE, A PERFORATE FIXED FILTER MEDIUM OVERLYING THE OPEN TOP OF SAID VACUUM CHAMBER TO REMOVE SAID PARTICLES FROM LIQUID FLOWING THROUGH SAID OPEN TOP AND INTO SAID CHAMBER, SUCH PARTICLES ACCRETING ON THE UPPER SURFACE OF SAID MEDIUM, AN ENDLESS CONVEYOR IN THE FORM OF A CLOSED LOOP CIRCUMSCRIBING SAID CHAMBER AND HAVING A LOWER REACH DEPENDING INTO SAID TANK TO BE INTERPOSED BETWEEN SAID CHAMBER AND SAID TANK BOTTOM WALL AND AN UPPER REACH OVERLYING SAID CHAMBER, SAID CONVEYOR HAVING TRANSVERSE SCRAPER FLIGHTS OVERLYING THE UPPER SURFACES OF SAID MEDIUM, POWER MEANS FOR ADVANCING SAID CONVEYOR IN SAID LOOP TO SCRAPE FROM SAID MEDIUM PARTICLES ACCRETED THEREON AND CONTACTED BY SAID FLIGHTS, AND A FILTRATE PUMP HAVING ITS INTAKE CONNECTED TO SAID CHAMBER, TO CREATE A VACUUM THEREIN SUPPLEMENTING THE STATIC HEAD OF SAID
Claim 2
Dependent Claim
172 words
IN A FILTER APPARATUS INCLUDING A TANK HAVING SIDE, END AND BOTTOM WALLS AND TO WHICH CONTAMINATED LIQUID IS SUPPLIED, MEANS FOR MAINTAINING THE LIQUID LEVEL IN SAID TANK SUBSTANTIALLY CONSTANT, A VACUUM BOX LOCATED INTERIORLY OF SAID TANK IN SPACED RELATION TO THE WALLS THEREOF TO PROJECT LATERALLY ACROSS THE TANK, SAID VACUUM BOX HAVING OPENINGS IN OPPOSING WALLS THEREOF, A FIRST PERFORATE FILTER MEDIUM AT ONE OF SAID WALL OPENINGS AND A SECOND AND DIFFERENT PERFORATE FILTER MEDIUM AT THE OTHER OF SAID WALL OPENINGS SO THAT FILTRATE ONLY ENTERS THE INTERIOR OF SAID BOX, CONTAMINANTS ACCRETING ON SAID MEDIA, RESPECTIVELY, AN ENDLESS CONVEYOR IN THE FORM OF A LOOP CIRCUMSCRIBING SAID BOX, SAID CONVEYOR HAVING SEPARATE REACHES PARALLELING SAID FIRST AND SECOND MEDIA, RESPECTIVELY, AND SAID CONVEYOR REACHES EACH HAVING SCRAPER FLIGHTS CONTACTING CONTAMINANTS ACCRETING ON ON SAID MEDIA, MEANS FOR ADVANCING SAID CONVEYOR IN SAID LOOP SO THAT SAID FLIGHT REMOVE CONTAMINANTS FROM BOTH SAID MEDIA, AND A FILTRATE PUMP HAVING ITS INTAKE CONNECTED TO SAID VACUUM BOX.
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) | 1968-12-06 | 1969-06-07 | 1969-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-06 | 1973-06-07 | 1973-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-06 | 1977-06-07 | 1977-12-07 | $7700.00 | Window Closed / Lapsed |