US3080693A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatic cleaning apparatus for filters in compressed air systems
Assignee: Westinghouse Air Brake Co
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Filing: 1958-10-29
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Granted: 1963-03-12
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Expires: 1978-10-29
Abstract
No abstract record available.
Inventors
- 👤 William H Glass
- 👤 Robert G Widmyer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:26
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/66; B01D46/70; B01D46/71; F; F04; F04B; F04B39/00; F04B39/16; F16; F16L; F16L55/00; F16L55/24; F22; F22B; F22B37/00; F22B37/02; F22B37/26; F22B37/265
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
109 words
CLEANSING APPARATUS FOR A FILTER UNIT OF THE DESICCANT TYPE DISPOSED IN A CONDUIT CONNECTING A FLUID COMPRESSOR TO A STORAGE RESERVOIR, SAID CLEANSING APPARATUS BEING CHARACTERIZED BY A PURGE RESERVOIR CHARGED WITH FLUID UNDER PRESSURE DELIVERED BY THE FLUID COMPRESSOR AND FLUID PRESSURE OPERATED VALVE MEANS OPERATED IN CONSEQUENCE OF THE PRESSURE IN THE STORAGE RESERVOIR REACHING A CHOSEN VALUE FOR CONCURRENTLY CUTTING OFF THE SUPPLY OF FLUID UNDER PRESSURE TO THE FILTER UNIT AND FOR EFFECTING A SUPPLY OF FLUID UNDER PRESSURE FROM SAID PURGE RESERVOIR THROUGH THE FILTER UNIT TO ATMOSPHERE IN A DIRECTION OPPOSITE TO THE NORMAL DIRECTION OF FLOW OF FLUID UNDER PRESSURE THERE-
Claim 2
Dependent Claim
109 words
CLEANSING APPARATUS FOR A FILTER UNIT OF THE DESICCANT TYPE DISPOSED IN A CONDUIT CONNECTING A FLUID COMPRESSOR TO A STORAGE RESERVOIR, SAID CLEANSING APPARATUS BEING CHARACTERIZED BY A PURGE RESERVOIR CHARGED WITH FLUID UNDER PRESSURE DELIVERED BY THE FLUID COMPRESSOR AND FLUID PRESSURE OPERATED VALVE MEANS OPERATED IN CONSEQUENCE OF THE PRESSURE IN THE STORAGE RESERVOIR REACHING A CHOSEN VALUE FOR CONCURRENTLY CUTTING OFF THE SUPPLY OF FLUID UNDER PRESSURE TO THE FILTER UNIT AND FOR EFFECTING A SUPPLY OF FLUID UNDER PRESSURE FROM SAID PURGE RESERVOIR THROUGH THE FILTER UNIT TO ATMOSPHERE IN A DIRECTION OPPOSITE TO THE NORMAL DIRECTION OF FLOW OF FLUID UNDER PRESSURE THERE-
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) | 1966-03-11 | 1966-09-10 | 1967-03-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-03-11 | 1970-09-10 | 1971-03-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-03-11 | 1974-09-10 | 1975-03-12 | $7700.00 | Window Closed / Lapsed |