US PATENT SUBCLASS 92 / 49
.~ Diaphragm type having working fluid contacting areas of different size


Current as of: June, 1999
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92 /   HD   EXPANSIBLE CHAMBER DEVICES

48  DF  PLURAL FLEXIBLE WALL WORKING MEMBERS {2}
49.~ Diaphragm type having working fluid contacting areas of different size


DEFINITION

Classification: 92/49

(under subclass 48) Apparatus in which each working member comprises a relatively thin membrane like member peripherally secured to an encompassing tubular structure and extending inwardly from said peripherally secured edge portion forming a partition for said tubular structure, and in which the surface area of one working member adapted to contact the working fluid is larger than the working fluid contacting surface area of a second of said working members.

SEE OR SEARCH CLASS

73, Measuring and Testing,

716+, for an expansible chamber type fluid pressure gage having plural, differential diaphragms.