US4779459A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas meter including a synthetic membrane
Assignee: SCHLUMBERGER INDUSTRIES SA
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Filing: 1986-02-11
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Granted: 1988-10-25
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Expires: 2006-02-11
Abstract
Abstract A gas meter includes a housing made of thermoplastic material having an inside wall defining two measuring chambers and a deformable membrane disposed between the two measuring chambers. The deformable membrane is formed from a film of thermoplastic elastomer material bonded to a synthetic fiber sheet. The periphery of the membrane is hot-welded to the wall between the two measuring chambers to form a gas-tight seal between the chambers. A mechanical drive train includes at least one lever having a hinged portion made from a thermoplastic material which is hot-welded to the middle of the membrane. The train drives a mechanical distributor disposed outside the housing.
Inventors
- 👤 Andre de Rego
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 14:48
CPC Classifications
B; B29; B29C; B29C66/00; B29C66/50; B29C66/51; B29C66/54; B29C51/00; B29C51/12; B29C51/14; B29C51/145; B29C65/00; B29C65/02; B29C65/18; B29C65/24; B29C65/30; B29C66/543; B29C66/70; B29C66/73; B29C66/739; B29C66/7392; B29C66/73921; B29C70/00; B29C70/68; B29C70/82; G; G01; G01F; G01F3/00; G01F3/02; G01F3/20; G01F3/22; G01F3/225; B29C66/01; B29C66/05; B29C66/10; B29C66/11; B29C66/112; B29C66/1122; B29C66/541; B29C66/5412; B29C66/71; B29C66/712; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C70/685; B29C70/687; Y; Y10; Y10T; Y10T156/00; Y10T156/10; Y10T156/1002; Y10T156/1043; Y10T156/1044; Y10T156/1048
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
164 words
A gas meter comprising: a housing made of thermoplastic material having an inside wall and defining two measuring chambers; a deformable membrane disposed in said housing between said chambers; said membrane being made of a complex comprising a film of thermoplastic elastomer material disposed opposite to one face of a synthetic fiber structure of substantially constant thickness, said elastomer material adhering to said film structure and covering said face of the film structure; said membrane further including a periphery which is fixed to said inside wall by hot-welding to form a gas-tight seal between the periphery of said membrane and said inside wall; a moving distributor disposed outside said housing; and a mechanical drive train for connecting said membrane to said distributor, said drive train including at least one lever and a part for connecting one end of said lever to said membrane in a hinged manner, said part being made of a thermoplastic material which is hot-welded to the middle of said membrane.
Claim 2
Dependent Claim
164 words
A gas meter comprising: a housing made of thermoplastic material having an inside wall and defining two measuring chambers; a deformable membrane disposed in said housing between said chambers; said membrane being made of a complex comprising a film of thermoplastic elastomer material disposed opposite to one face of a synthetic fiber structure of substantially constant thickness, said elastomer material adhering to said film structure and covering said face of the film structure; said membrane further including a periphery which is fixed to said inside wall by hot-welding to form a gas-tight seal between the periphery of said membrane and said inside wall; a moving distributor disposed outside said housing; and a mechanical drive train for connecting said membrane to said distributor, said drive train including at least one lever and a part for connecting one end of said lever to said membrane in a hinged manner, said part being made of a thermoplastic material which is hot-welded to the middle of said membrane.
Claim 3
Dependent Claim
29 words
The gas meter of claim 1 wherein the membrane comprises a second film of thermoplastic elastomer material disposed on a face of said fiber structure opposite said one face.
Claim 4
Dependent Claim
14 words
The gas meter of claim 1 wherein the thermoplastic elastomer material is a polyurethane.
Claim 5
Dependent Claim
16 words
The gas meter of claim 1 wherein said fibers of said structure are made of polyester.
Claim 6
Dependent Claim
13 words
The gas meter of claim 4 wherein said fibers are made of polyamide.
Claim 7
Dependent Claim
33 words
A gas meter of claim 1, wherein said fiber structure is woven and has a mesh which is substantially square with a side lying in the range of 0.2 millimeter to 4 millimeters.
Claim 8
Dependent Claim
19 words
The gas meter of claim 1, wherein said films of thermoplastic elastomer material are 25 to 30 μm thick.
Claim 9
Dependent Claim
13 words
A gas meter according to claim 1, wherein said fiber structure is knitted.
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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) | 1991-10-25 | 1992-04-25 | 1992-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-10-25 | 1996-04-25 | 1996-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-25 | 2000-04-25 | 2000-10-25 | $7700.00 | Window Closed / Lapsed |