US3894436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential pressure gauge
Assignee: Individual
•
Filing: 1974-06-11
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Granted: 1975-07-15
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Expires: 1994-06-11
Abstract
Abstract A differential pressure gauge is provided with a base and two membranes secured along the outer contour to the opposite sides of the base. The membranes are rigidly interconnected by their middle portions, are located at a certain distance from the base and define, together with the base, a pressure-tight space filled with a liquid. Besides, the membranes are rigidly fastened to the base along the circular portions which are concentric with the outer contours of the membranes while the circular peripheral spaces thus separated from the pressure-tight space communicate with the latter through channels.
Inventors
- 👤 Albert Yakovlevich Jurovsky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 02:00
CPC Classifications
G; G01; G01L; G01L13/00; G01L13/02; G01L13/025; G01L11/00; G01L11/004
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
163 words
A differential pressure gauge comprising a base having an outer contour and opposite sides; two membranes secured along the outer contour to the opposite sides of said base; a circular zone on each of said membranes arranged concentric with its outer contour and serving for additional rigid fastening of each of said membranes to said base; said base having a hole; middle portions of said membranes rigidly interconnected through said hole in the base; a pressure-tight space between said base and said membranes; a liquid contained in said pressure-tight space; circular peripheral spaces separated by said circular zones of the membranes from said pressure-tight space; channels which provide communication between said circular peripheral spaces and said pressure-tight space; a means connected with said middle portions of the membranes and serving to transmit the motion of the membranes caused by the difference of pressures; and a means which transforms the motion of the membranes into an output signal and interacts with said first means.
Claim 2
Dependent Claim
163 words
A differential pressure gauge comprising a base having an outer contour and opposite sides; two membranes secured along the outer contour to the opposite sides of said base; a circular zone on each of said membranes arranged concentric with its outer contour and serving for additional rigid fastening of each of said membranes to said base; said base having a hole; middle portions of said membranes rigidly interconnected through said hole in the base; a pressure-tight space between said base and said membranes; a liquid contained in said pressure-tight space; circular peripheral spaces separated by said circular zones of the membranes from said pressure-tight space; channels which provide communication between said circular peripheral spaces and said pressure-tight space; a means connected with said middle portions of the membranes and serving to transmit the motion of the membranes caused by the difference of pressures; and a means which transforms the motion of the membranes into an output signal and interacts with said first means.
Claim 3
Dependent Claim
50 words
The differential pressure gauge as claimed in claim 1 comprising a valve on each of said membranes for sealing off said hole in the base on application of a one-sided overload pressure; circular projections on said base for fastening to said circular zones with said channels being in said projections.
References Cited (Backward Citations)
US3724275A
Cited
US3822596A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-14 | 1979-01-13 | 1979-07-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-14 | 1983-01-13 | 1983-07-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-14 | 1987-01-13 | 1987-07-15 | $7700.00 | Window Closed / Lapsed |