US3856078A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Devices for tanks containing fluid medium
Assignee: Patents and Development AS
•
Filing: 1973-05-15
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Granted: 1974-12-24
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Expires: 1993-05-15
Abstract
Abstract A device for a tank containing fluid medium, especially socalled heavy oils, which comprises a housing submerged in said medium and thermally insulated therefrom with a heat exchanger disposed therein for heating the fluid medium. The housing has at its opposite ends a first or inlet and mixing chamber and a second or combined circulation and outlet chamber respectively. The first chamber is in open flow connection with the surrounding fluid medium while the second chamber is in valve-controlled flow connection with a discharge conduit. A pump adjacent one end of the heat exchanger is adapted to force fluid medium through a flow passage from the first chamber via the heat exchanger into the second chamber while another flow passage permits circulation from the second chamber to the first chamber so as to maintain the mixing of heated fluid medium from the heat exchanger and unheated fluid medium from the tank in step with the discharge of heated fluid medium from the discharge conduit.
Inventors
- 👤 C Dahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 22:54
CPC Classifications
F; F28; F28D; F28D1/00; F28D1/02; F28D1/0206; F28D1/0213; D; D06; D06B; D06B19/00; D06B19/0088; D06B19/0094; F23; F23K; F23K5/00; F23K5/02; F23K5/14; F23K5/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
200 words
A device within a tank containing fluid medium, especially so-called heavy oils, which comprise an insulated housing submerged in the fluid medium a heat exchanger having an outer jacket arranged in said housing for heating said medium, said housing comprising at its one end a first chamber in the form of an inlet and mixing chamber and at its other end a second chamber in the form of a combined circulation and outlet chamber, said one end being in open flow connection with the surrounding fluid medium and said other end being in valve-controlled flow connection with a discharge conduit, said first and second chambers being interconnected via at least two separate flow passages within said housing, a pump disposed in the housing adjacent an end of the heat exchanger and adapted to force fluid medium along one flow passage from the first chamber via the heat exchanger into the second chamber while another flow passage permits circulation from said second chamber to said first chamber so as to keep the mixing of heated fluid medium from the heat exchanger and unheated fluid medium from the tank in step with the discharge of heated fluid medium from said discharge conduit.
Claim 2
Independent Claim
200 words
A device within a tank containing fluid medium, especially so-called heavy oils, which comprise an insulated housing submerged in the fluid medium a heat exchanger having an outer jacket arranged in said housing for heating said medium, said housing comprising at its one end a first chamber in the form of an inlet and mixing chamber and at its other end a second chamber in the form of a combined circulation and outlet chamber, said one end being in open flow connection with the surrounding fluid medium and said other end being in valve-controlled flow connection with a discharge conduit, said first and second chambers being interconnected via at least two separate flow passages within said housing, a pump disposed in the housing adjacent an end of the heat exchanger and adapted to force fluid medium along one flow passage from the first chamber via the heat exchanger into the second chamber while another flow passage permits circulation from said second chamber to said first chamber so as to keep the mixing of heated fluid medium from the heat exchanger and unheated fluid medium from the tank in step with the discharge of heated fluid medium from said discharge conduit.
Claim 3
Dependent Claim
68 words
The device of claim 1, wherein said housing has its main axis substantially horizontal with said one end thereof formed with a downwardly directed inlet openiNg disposed at a predetermined level above the bottom of the tank, said circulatory flow passage having at least one branch passage at the top and bottom of the housing respectively, the branch passage at the bottom passing just by said inlet opening.
Claim 4
Dependent Claim
35 words
The device of claim 1, wherein said housing forms a unit which can be separately withdrawn through the wall of the tank and is secured to said wall by means of a seal-forming fastening flange.
Claim 5
Dependent Claim
20 words
The device of claim 1, wherein said fluid medium is constantly circulating through said device when said pump is operating.
Claim 6
Dependent Claim
49 words
The device of claim 1, wherein said heat exchanger comprises a plurality of pipes within said outer jacket through which heat exchanging fluid passes, said one flow passage being through said outer jacket and around said pipes, said other flow passage being between said outer jacket and said housing.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-23 | 1978-06-24 | 1978-12-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-23 | 1982-06-24 | 1982-12-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-23 | 1986-06-24 | 1986-12-24 | $7700.00 | Window Closed / Lapsed |