Patent US3225771A successfully refreshed from Google Patents.
Patent US3854997A successfully refreshed from Google Patents.
US3854997A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Jet flame cleaning
Assignee: PECK C CO INC US
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Filing: 1973-04-10
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Granted: 1974-12-17
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Expires: 1993-04-10
Abstract
Abstract A flame head producing a high velocity jet flame is utilized with a venturi type adapter unit which creates a vacuum pick-up for abrasive particles or coating materials that are stored in a non-pressurized container, said material being propelled at a high velocity and temperature through the flame. Since the flame from the head is virtually oxygen free or inert, neither the coating particles, the abrasive particles, nor the surface being treated will be oxidized.
Inventors
- 👤 C Peck
- 👤 C Garrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 17:44
CPC Classifications
E; E21; E21B; E21B7/00; E21B7/14; B; B24; B24C; B24C5/00
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
115 words
A METHOD OF CLEANING A SURFACE WITH ABRASIVE MATERIAL INCLUDING THE STEPS OF: A. PRODUCING A SUPERSONIC JET FLAME BY COMBUSTING A FUEL WITHIN A COMBUSTION CHAMBER; B. PASSING SAID FLAME THROUGH A VENTURI ELEMENT POSITIONED EXTERIORLY OF SAID COMBUSTION CHAMBER, SAID ELEMENY BENG IN COMMUNICATION WITH A SUPPLY OF SAID ABRASIVE MATERIAL; C. INTRODUCING SAID ABRASIVE MATERIAL INTO SAID FLAME AT CIRCUMFERENTIALLY AND AXIALLY SPACED POINTS RELATIVE TO THE FLAME PASSAGE AND FROM A NONPRESSURIZED CONTAINER BY MEANS OF THE VACUUM CREATED IN SAID VENTURI FLAME THROUGH ACTING ON SAID SUPPLY BY THE PASSAGE OF SAID FLAME THROUGH SAID VENTURI ELEMENT; AND, D. DIRECTING SAID ABRASIVE MATERIAL-CARRYING FLAME ONTO THE SURFACE TO BE CLEANED.
Claim 2
Independent Claim
115 words
A METHOD OF CLEANING A SURFACE WITH ABRASIVE MATERIAL INCLUDING THE STEPS OF: A. PRODUCING A SUPERSONIC JET FLAME BY COMBUSTING A FUEL WITHIN A COMBUSTION CHAMBER; B. PASSING SAID FLAME THROUGH A VENTURI ELEMENT POSITIONED EXTERIORLY OF SAID COMBUSTION CHAMBER, SAID ELEMENY BENG IN COMMUNICATION WITH A SUPPLY OF SAID ABRASIVE MATERIAL; C. INTRODUCING SAID ABRASIVE MATERIAL INTO SAID FLAME AT CIRCUMFERENTIALLY AND AXIALLY SPACED POINTS RELATIVE TO THE FLAME PASSAGE AND FROM A NONPRESSURIZED CONTAINER BY MEANS OF THE VACUUM CREATED IN SAID VENTURI FLAME THROUGH ACTING ON SAID SUPPLY BY THE PASSAGE OF SAID FLAME THROUGH SAID VENTURI ELEMENT; AND, D. DIRECTING SAID ABRASIVE MATERIAL-CARRYING FLAME ONTO THE SURFACE TO BE CLEANED.
Claim 3
Dependent Claim
24 words
The method of cleaning as defined in claim 1 wherein said jet flame is of a temperature within the range of 2800*F. to 4000*F.
Claim 4
Dependent Claim
26 words
A method of cleaning as defined in claim 1 wherein said jet flame has a velocity within the range of 3000 to 3800 feet per second.
Claim 5
Dependent Claim
16 words
The method of cleaning as defined in claim 1 wherein said abrasive maTerial is continually introduced.
References Cited (Backward Citations)
US2399680A
Cited
US2675993A
Cited
US2714563A
Cited
US2920001A
Cited
US3212217A
Cited
US3463249A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |