Patent US3398765A successfully refreshed from Google Patents.
US3398765A
Expired / Lapsed
US
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Bent pipe way having improved flow characteristics
Assignee: Hitachi Ltd
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Filing: 1964-01-14
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Granted: 1968-08-27
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Expires: 1984-01-14
Abstract
No abstract record available.
Inventors
- 👤 Oshima Ryoichiro
- 👤 Hanawada Keiichi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:02
CPC Classifications
F; F15; F15D; F15D1/00; F15D1/02; F15D1/04; G; G01; G01F; G01F15/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
119 words
A FLOW IMPROVEMENT DEVICE WHICH COMPRISES; (A) A PIPE WAY, WITH A BEND THEREIN (B) A PRESSURE DIFFERENCE DEVICE FOR FLOW METERING LOCATED WITHIN SAID PIPE WAY AND DOWNSTREAM FROM SAID BEND (C) A GUIDE PLATE SECURED IN THE BEND IN SAID PIPE WAY AND EXTENDING COMPLETELY ACROSS A DIAMETER OF SAID PIPE WAY FOR REDUCING THE CIRCUMFERENTIAL VELOCITY COMPONENTS OF A FLUID FLOWING IN SAID PIPE WAY; AND (D) AN OPEN ENDED FRUSTO-CONICAL ELEMENT SUBSTANTIALLY CONCENTRICALLY MOUNTED WITHIN SAID PIPE WAY AND LOCATED DOWNSTREAM FROM SAID BEND AND UPSTREAM FROM SAID PRESSURE DIFFERENCE DEVICE WITH THE LARGE END THEREOF DIRECTED DOWNSTREAM FOR INCREASING THE FLOW VELOCITY OF THE FLUID STREAM AROUND THE OUTER SURFACE OF THE PIPE WAY.
Claim 2
Dependent Claim
119 words
A FLOW IMPROVEMENT DEVICE WHICH COMPRISES; (A) A PIPE WAY, WITH A BEND THEREIN (B) A PRESSURE DIFFERENCE DEVICE FOR FLOW METERING LOCATED WITHIN SAID PIPE WAY AND DOWNSTREAM FROM SAID BEND (C) A GUIDE PLATE SECURED IN THE BEND IN SAID PIPE WAY AND EXTENDING COMPLETELY ACROSS A DIAMETER OF SAID PIPE WAY FOR REDUCING THE CIRCUMFERENTIAL VELOCITY COMPONENTS OF A FLUID FLOWING IN SAID PIPE WAY; AND (D) AN OPEN ENDED FRUSTO-CONICAL ELEMENT SUBSTANTIALLY CONCENTRICALLY MOUNTED WITHIN SAID PIPE WAY AND LOCATED DOWNSTREAM FROM SAID BEND AND UPSTREAM FROM SAID PRESSURE DIFFERENCE DEVICE WITH THE LARGE END THEREOF DIRECTED DOWNSTREAM FOR INCREASING THE FLOW VELOCITY OF THE FLUID STREAM AROUND THE OUTER SURFACE OF THE PIPE WAY.
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) | 1971-08-27 | 1972-02-26 | 1972-08-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-08-27 | 1976-02-26 | 1976-08-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-08-27 | 1980-02-26 | 1980-08-27 | $7700.00 | Window Closed / Lapsed |