US3736985A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry chemical unit-fire truck
Assignee: Individual
•
Filing: 1971-09-17
•
Granted: 1973-06-05
•
Expires: 1991-09-17
Abstract
Abstract An appliance for safely and economically combating fires in oil fields, the appliance comprising a large container for holding dry chemical which is discharged at high pressure with a dry gas comprising nitrogen.
Inventors
- 👤 W Beckley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:20
CPC Classifications
A; A62; A62C; A62C13/00; A62C13/006
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
327 words
In a dry chemical unit, the combination of a container, said container having a means for admittance of dry gas into said container, said dry gas comprising nitrogen, and said container having self-contained means whereby dry chemical contained within said container is discharged outwardly of said container at high pressure for admittance of said dry gas comprising nitrogen, said container comprising a cylindrical central body comprised of pipe material, one end of said cylindrical body having a hemispherical head secured thereto, the opposite end of said cylindrical body being connected to a second hemispherical head, the upper end of the first said hemispherical head being surmounted by a common cap with screw threads which is surmounted by a pressure gauge, a nitrogen gas being admitted into said container by an inlet pipe assembly, said inlet pipe assembly comprising a coupling extending outwardly of said container, one end of said coupling being connected to a horizontal pipe, the opposite end of said horizontal pipe being connected to A 90* weld ell fitting which at its opposite end is connected to a vertically extending pipe, said vertically extending pipe having a fitting in the lower end thereof, said fitting at the terminal lower end thereof having a plurality of openings therethrough, and through which said dry nitrogen gas is discharged into said tank or container, said fitting supporting a dispersing fan therebetween and an inner side of said second hemispherical head, an outlet pipe assembly comprising a coupling extending outward of said container, one end of said coupling being connected to a 90* conduit bend member which at its opposite end is connected to a vertically extending pipe, said vertically extending pipe having a lower end that is open so to admit said dry chemical to enter the lower end of said pipe and being discharged outwardly of said container, said dry chemical unit able to be wheel-mounted and being caterpillar track fitted for movement over a rough terrain.
Claim 2
Dependent Claim
327 words
In a dry chemical unit, the combination of a container, said container having a means for admittance of dry gas into said container, said dry gas comprising nitrogen, and said container having self-contained means whereby dry chemical contained within said container is discharged outwardly of said container at high pressure for admittance of said dry gas comprising nitrogen, said container comprising a cylindrical central body comprised of pipe material, one end of said cylindrical body having a hemispherical head secured thereto, the opposite end of said cylindrical body being connected to a second hemispherical head, the upper end of the first said hemispherical head being surmounted by a common cap with screw threads which is surmounted by a pressure gauge, a nitrogen gas being admitted into said container by an inlet pipe assembly, said inlet pipe assembly comprising a coupling extending outwardly of said container, one end of said coupling being connected to a horizontal pipe, the opposite end of said horizontal pipe being connected to A 90* weld ell fitting which at its opposite end is connected to a vertically extending pipe, said vertically extending pipe having a fitting in the lower end thereof, said fitting at the terminal lower end thereof having a plurality of openings therethrough, and through which said dry nitrogen gas is discharged into said tank or container, said fitting supporting a dispersing fan therebetween and an inner side of said second hemispherical head, an outlet pipe assembly comprising a coupling extending outward of said container, one end of said coupling being connected to a 90* conduit bend member which at its opposite end is connected to a vertically extending pipe, said vertically extending pipe having a lower end that is open so to admit said dry chemical to enter the lower end of said pipe and being discharged outwardly of said container, said dry chemical unit able to be wheel-mounted and being caterpillar track fitted for movement over a rough terrain.
References Cited (Backward Citations)
US1839658A
Cited
US2432146A
Cited
US2459743A
Cited
US2832425A
Cited
US2933139A
Cited
US3375875A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |