US3834231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Flexible diaphragms for gas meter
Assignee: TOKYO TOYO RUBBER IND CO Ltd
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Filing: 1973-04-17
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Granted: 1974-09-10
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Expires: 1993-04-17
Abstract
Abstract This invention relates to flexible diaphragms for gas meters used generally for measurement of gas consumption, and a method of producing such diaphragms. More particularly, the invention relates to diaphragms having sufficient flexibility and airtightness so that they are suitable for use as a key component member in a gas measuring device such as for example a gas meter for measuring the amount consumed of household combustion gas, and a method of producing such diaphragms.
Inventors
- 👤 H Hisada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 16:07
CPC Classifications
G; G01; G01F; G01F3/00; G01F3/02; G01F3/20; G01F3/22; G01F3/225
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
116 words
In a gas meter, a flexible diaphragm having a top wall, a peripheral inclined side wall extending from the periphery of the top wall and flaring in a direction away from said top wall and a peripheral flange extending outwardly from the opposite end of the side wall, said diaphragm having at least one elastomeric gasket secured to one side of said flange, the improvement which comprises: said diaphragm is made of a heat-shrunk fabric of synthetic resin fibers, said fabric being coated on one or both of its sides with a gas-impermeable elastomeric layEr, the inner edge portion of said gasket adjacent said side wall of said diaphragm being free from attachment to said flange.
Claim 2
Dependent Claim
116 words
In a gas meter, a flexible diaphragm having a top wall, a peripheral inclined side wall extending from the periphery of the top wall and flaring in a direction away from said top wall and a peripheral flange extending outwardly from the opposite end of the side wall, said diaphragm having at least one elastomeric gasket secured to one side of said flange, the improvement which comprises: said diaphragm is made of a heat-shrunk fabric of synthetic resin fibers, said fabric being coated on one or both of its sides with a gas-impermeable elastomeric layEr, the inner edge portion of said gasket adjacent said side wall of said diaphragm being free from attachment to said flange.
Claim 3
Dependent Claim
19 words
A flexible diaphragm as defined in claim 1, in which said fibers are heat-shrinkable nylon fibers or polyester fibers.
Claim 4
Dependent Claim
17 words
A flexible diaphragm as defined in claim 1, in which said elastomer layer is vulcanized acrylonitrile-butadiene rubber.
Claim 5
Dependent Claim
21 words
A flexible diaphragm as defined in claim 1, in which said gasket is secured to said flange by being vulcanized thereto.
Claim 6
Dependent Claim
20 words
A flexible diaphragm as defined in claim 1, in which said gasket is secured to said flange by an adhesive.
Claim 7
Dependent Claim
148 words
In a gas meter, a flexible diaphragm having a top wall, a peripheral inclined side wall extending from the periphery of the top wall and flaring in a direction away from said top wall and a peripheral flange extending outwardly from the opposite end of the side wall, said diaphragm having at least one elastomeric gasket secured to one side of said flange, the improvement which comprises: said diaphragm is made of a heat-shrunk fabric of synthetic resin fibers, said fabric being coated on one or both of its sides with a gas-impermeable elastomeric layer, said gasket comprising an inner portion adjacent said side wall of said diaphragm and an outer portion remote from said side wall, said inner portion being of lesser thickness than said outer portion, said inner portion being free from attachment to said flange and said outer portion being fixedly secured to said flange.
Claim 8
Dependent Claim
148 words
In a gas meter, a flexible diaphragm having a top wall, a peripheral inclined side wall extending from the periphery of the top wall and flaring in a direction away from said top wall and a peripheral flange extending outwardly from the opposite end of the side wall, said diaphragm having at least one elastomeric gasket secured to one side of said flange, the improvement which comprises: said diaphragm is made of a heat-shrunk fabric of synthetic resin fibers, said fabric being coated on one or both of its sides with a gas-impermeable elastomeric layer, said gasket comprising an inner portion adjacent said side wall of said diaphragm and an outer portion remote from said side wall, said inner portion being of lesser thickness than said outer portion, said inner portion being free from attachment to said flange and said outer portion being fixedly secured to said flange.
Claim 9
Dependent Claim
21 words
A flexible diaphragm as defined in claim 6, in which said gasket is secured to the upper side of said flange.
Claim 10
Dependent Claim
21 words
A flexible diaphragm as defined in claim 6, in which said gasket is secured to the lower side of said flange.
Claim 11
Dependent Claim
23 words
A flexible diaphragm as defined in claim 6, in which separate gaskets are secured to the upper and lower sides of said flange.
Claim 12
Dependent Claim
19 words
A flexible diaphragm as defined in claim 6, in which said fibers are heat-shrinkable nylon fibers or polyester fibers.
References Cited (Backward Citations)
US1914600A
Cited
US3659448A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |