US3675540A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaphragm
Assignee: Honeywell Inc
•
Filing: 1969-07-18
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Granted: 1972-07-11
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Expires: 1989-07-18
Abstract
Abstract A diaphragm unit having a diaphragm support plate that is subject to corrosion and a corrosive resistant metal sheet that covers an aperture formed by an inner wall of the diaphragm support plate to protect it from corrosion. The sheet is seam welded to the support plate while the aforementioned inner wall, the space between the inner wall and the outermost wall of the support plate and the edge of the outermost wall are held in a tightly adhered to manner with one another.
Inventors
- 👤 Eiji Murata
- 👤 Kohuku Ito
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:09
CPC Classifications
G; G01; G01L; G01L19/00; G01L19/06; G01L19/0627; G01L19/0645
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
116 words
A diaphragm unit comprising a sheet of a corrosive resistive metal, a diaphragm support plate made of a material that is subject to corrosion and having an inner wall that forms an opening therein, said sheet being mounted to cover said wall opening in said plate and being tightly adhered by contraction for engagement with said inner and an outer wall of the plate and an intermediate surface of the plate extending between its said inner and outer edge walls to protect it from the corrosive action of a corrosive fluid, and wherein an inner circumferential portion of the flexible sheet is bonded to the said inner wall of the diaphragm support plate by seam welding.
Claim 2
Dependent Claim
116 words
A diaphragm unit comprising a sheet of a corrosive resistive metal, a diaphragm support plate made of a material that is subject to corrosion and having an inner wall that forms an opening therein, said sheet being mounted to cover said wall opening in said plate and being tightly adhered by contraction for engagement with said inner and an outer wall of the plate and an intermediate surface of the plate extending between its said inner and outer edge walls to protect it from the corrosive action of a corrosive fluid, and wherein an inner circumferential portion of the flexible sheet is bonded to the said inner wall of the diaphragm support plate by seam welding.
References Cited (Backward Citations)
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Cited
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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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |