US4073191A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure transducer
Assignee: Yokogawa Electric Corp
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Filing: 1976-12-02
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Granted: 1978-02-14
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Expires: 1996-12-02
Abstract
Abstract A differential-pressure transducer of the type comprising a measuring diaphragm supported at its peripheral edges and its sides presented to respective internal chambers filled with a pressure-transmitting liquid, the chambers and the diaphragm being contained in a body mounted within the interior space of an outer housing, there also being provided a pair of seal diaphragms remote from the measuring diaphragm and establishing liquid-filled isolation chambers communicating with said internal chambers respectively, the opposite sides of the seal diaphragms being adapted to receive the pressures whose differential is to be measured, and the peripheries of the seal diaphragms being secured to the housing.
Inventors
- 👤 Tokuji Saigusa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:09
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02; G01L13/025; G01L19/00; G01L19/06; G01L19/0627; G01L19/0645; G01L9/00; G01L9/0041; G01L9/0072
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
80 words
In a differential-pressure transducer of the type comprising: a measuring diaphragm mounted in a body forming two internal chambers on opposite sides of the measuring diaphragm; a housing having an internal space within which said body is elastically supported; seal diaphragms forming isolation chambers remote from said internal chambers and having sides subjected to measuring pressures; and fluid passageway means connecting each internal chamber to a respective isolation chamber; that improvement wherein said seal diaphragms are fastened to said housing.
Claim 2
Dependent Claim
80 words
In a differential-pressure transducer of the type comprising: a measuring diaphragm mounted in a body forming two internal chambers on opposite sides of the measuring diaphragm; a housing having an internal space within which said body is elastically supported; seal diaphragms forming isolation chambers remote from said internal chambers and having sides subjected to measuring pressures; and fluid passageway means connecting each internal chamber to a respective isolation chamber; that improvement wherein said seal diaphragms are fastened to said housing.
Claim 3
Dependent Claim
19 words
A differential-pressure transducer as claimed in claim 1 including ring-shaped connecting members providing said elastic support of said body.
Claim 4
Dependent Claim
24 words
A differential pressure transducer as claimed in claim 1 comprising tubular elements respectively on both sides of said body to provide said elastic support.
Claim 5
Dependent Claim
16 words
A differential-pressure transducer as claimed in claim 1 comprising covers mounted opposite to said seal diaphragms.
Claim 6
Dependent Claim
20 words
A differential-pressure transducer as claimed in claim 4 wherein said seal diaphragms are held between said covers and said housing.
Claim 7
Dependent Claim
21 words
A differential-pressure transducer as claimed in claim 5 including gaskets to hold said seal diaphragms between said covers and said housing.
Claim 8
Dependent Claim
28 words
A differential-pressure transducer as claimed in claim 6 further including annular rings cooperatively engaged with said gaskets to hold said seal diaphragms between said covers and said housing.
Claim 9
Dependent Claim
35 words
A differential-pressure transducer as claimed in claim 1 wherein said internal chambers are adapted to serve as capacitance plates so that a displacement of said measuring diaphragm is detected as a change in static capacitance.
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) | 1981-02-13 | 1981-08-15 | 1982-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-02-13 | 1985-08-15 | 1986-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-02-13 | 1989-08-15 | 1990-02-14 | $7700.00 | Window Closed / Lapsed |