US3176449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reverse-jet type dust filter
Assignee: BUFFALO FOREGE COMPANY
•
Filing: 1961-12-06
•
Granted: 1965-04-06
•
Expires: 1981-12-06
Abstract
No abstract record available.
Inventors
- 👤 Carlos S Schultz
- 👤 Robert J W Williams
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:25
CPC Classifications
B; B01; B01D; B01D46/00; B01D46/02; B01D46/04; B01D46/66; B01D46/70; B01D46/71
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
149 words
IN A DUST FILTER WHEREIN A POROUS, FLEXIBLE, CYLINDRICAL FILTER MEDIUM IS EMPLOYED FOR ACCUMULATING UPON THE INNER SIDE THEREOF SOLID PARTICLES FROM A DUST-LADEN GAS AND WHEREIN A REVERSE-JET CLEANING DEVICE COMPRISING A PLURALITY OF SEPARATE HOLLOW CURVED SECTIONS MOUNTED ON A CARRIAGE AND SUBSTANTIALLY ENCIRCLING THE FILTER MEDIUM IS EMPLOYED TO DISLOGE THE SOLID PARTICLES FROM THE FILTER MEDIUM BY EHECTING A JET OF PRESSURIZED FLUID FROM WITHOUT TO WITHIN SAID FILTER MEDIUM THROUGH AN ORIFICE IN EACH CURVED SECTION WHILE THE REVERSE-JET CLEANING DEVICE IS RECIPROCATED ALONG THE LENGTH OF THE FILTER MEDIUM, THE IMPROVEMENT COMPRISING MEANS MOUNTED ON THE CARRIAGE FOR MOVING SAID PLURALITY OF CURVED SECTIONS TO A RETRACTED POSITION OUT OF PHYSICAL CONTACT WITH SAID FILTER MEDIUM AND MEANS CONNECTED TO SAID REVERSE-JET CLEANING DEVICE FOR RECIPROCATING SAID REVERSE-JET CLEANING DEVICE WITH A HIGH SPEED "UP" STROKE AND A LOW SPEED "DOWN" STROKE.
Claim 2
Dependent Claim
149 words
IN A DUST FILTER WHEREIN A POROUS, FLEXIBLE, CYLINDRICAL FILTER MEDIUM IS EMPLOYED FOR ACCUMULATING UPON THE INNER SIDE THEREOF SOLID PARTICLES FROM A DUST-LADEN GAS AND WHEREIN A REVERSE-JET CLEANING DEVICE COMPRISING A PLURALITY OF SEPARATE HOLLOW CURVED SECTIONS MOUNTED ON A CARRIAGE AND SUBSTANTIALLY ENCIRCLING THE FILTER MEDIUM IS EMPLOYED TO DISLOGE THE SOLID PARTICLES FROM THE FILTER MEDIUM BY EHECTING A JET OF PRESSURIZED FLUID FROM WITHOUT TO WITHIN SAID FILTER MEDIUM THROUGH AN ORIFICE IN EACH CURVED SECTION WHILE THE REVERSE-JET CLEANING DEVICE IS RECIPROCATED ALONG THE LENGTH OF THE FILTER MEDIUM, THE IMPROVEMENT COMPRISING MEANS MOUNTED ON THE CARRIAGE FOR MOVING SAID PLURALITY OF CURVED SECTIONS TO A RETRACTED POSITION OUT OF PHYSICAL CONTACT WITH SAID FILTER MEDIUM AND MEANS CONNECTED TO SAID REVERSE-JET CLEANING DEVICE FOR RECIPROCATING SAID REVERSE-JET CLEANING DEVICE WITH A HIGH SPEED "UP" STROKE AND A LOW SPEED "DOWN" STROKE.
References Cited (Backward Citations)
US2551126A
Cited
US2729304A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-04-05 | 1968-10-05 | 1969-04-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-04-05 | 1972-10-05 | 1973-04-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-04-05 | 1976-10-05 | 1977-04-06 | $7700.00 | Window Closed / Lapsed |