US3596674A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine piping system for transferring liquids
Assignee: Niigata Engineering Co Ltd
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Filing: 1969-06-04
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Granted: 1971-08-03
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Expires: 1989-06-04
Abstract
Abstract When transferring liquid with high-solid point or high viscosity, such as crude oil or heavy fuel oil from a vessel to a shore tank or vice versa by means of a submarine piping system, the liquid remaining inside the pipe solidifies after the completion of the transferring operation and blocks the flow of the liquid through the pipe. To eliminate this drawback, an inner pipe is provided inside the pipe, thus forming a double pipe. Heated liquid with low solid point is sent through the inner pipe and back through the outer pipe, thereby replacing the liquid inside the inner and outer pipes. This services to preheat the double-pipe construction prior to the liquid transferring operation, thus enabling the transfer of the liquid to be carried out smoothly and economically.
Inventors
- 👤 Yoshie Takizawa
- 👤 Tatsuhiko Egami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 06:39
CPC Classifications
B; B67; B67D; B67D7/00; B67D7/06; B67D7/80; B63; B63B; B63B22/00; B63B22/02; B63B22/021; B67D9/00; B67D9/02; F; F17; F17D; F17D1/00; F17D1/08; F17D1/16; F17D1/18; Y; Y10; Y10T; Y10T137/00; Y10T137/2496; Y10T137/2511; Y10T137/6416; Y10T137/8593; Y10T137/85954
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
173 words
A submarine piping system for transferring liquid between a shore tank and a mooring point comprising: an outer pipe connected at one end to the mooring point through a first valve and connected at the other end through a second valve to the shore tank; an inner pipe having an outside diameter substantially smaller than the inside diameter of said outer pipe and extending inside the outer pipe along a major portion thereof, one end of said inner pipe communicating with the inside of the outer pipe at the end thereof adjacent said mooring point, the other end of said inner pipe being connected to a replacement tank through the serial connection of a third valve, a heater and a pump; a valved pipe line connecting said other end of the inner pipe directly to the replacement tank; a second valved pipe line connecting said other end of the outer pipe to the replacement tank; and a third valved pipe line connecting said other end of the inner pipe to the shore tank.
Claim 2
Dependent Claim
173 words
A submarine piping system for transferring liquid between a shore tank and a mooring point comprising: an outer pipe connected at one end to the mooring point through a first valve and connected at the other end through a second valve to the shore tank; an inner pipe having an outside diameter substantially smaller than the inside diameter of said outer pipe and extending inside the outer pipe along a major portion thereof, one end of said inner pipe communicating with the inside of the outer pipe at the end thereof adjacent said mooring point, the other end of said inner pipe being connected to a replacement tank through the serial connection of a third valve, a heater and a pump; a valved pipe line connecting said other end of the inner pipe directly to the replacement tank; a second valved pipe line connecting said other end of the outer pipe to the replacement tank; and a third valved pipe line connecting said other end of the inner pipe to the shore tank.
Claim 3
Dependent Claim
32 words
The submarine piping system of claim 1, wherein said one end of said inner pipe is open to the inside of the outer pipe adjacent said one end of the outer pipe.
Claim 4
Dependent Claim
69 words
The submarine piping system of claim 1, further including a partition inside the outer pipe to define a compartment at said one end thereof, said inner pipe extending, and opening into, said compartment at said one end thereof, and a valved pipe line connecting said compartment to the inside of the main portion of said outer pipe, said valved pipe line being separated from said compartment adjacent said compartment.
Claim 5
Dependent Claim
52 words
The submarine piping system of claim 1, wherein said one end of the inner pipe extends out of said outer pipe adjacent said one end of the outer pipe and is connected through a valved pipe line to the inside of the outer pipe adjacent said one end of the outer pipe.
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) | 1974-08-02 | 1975-02-01 | 1975-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-02 | 1979-02-01 | 1979-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-02 | 1983-02-01 | 1983-08-03 | $7700.00 | Window Closed / Lapsed |