Gas meter including a synthetic membrane
AssigneeFlonic
InventorAndre de Rego
Life of this patent
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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.
Claims8
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.
Dependencies are inferred from the claim text.