04976162 is referenced by 230 patents and cites 14 patents.

A system for measuring flow of fluid through a line. A portion of the fluid in the line is isolated in a rigid container so that the fluid in the container is not affected by pressure in the rest of the line. An apparatus is provided for measuring that portion of the container that is not occupied by the fluid. In order to urge fluid into and out of the container, a positive pressure source, for providing gas to the container, and a negative pressure source for removing gas from the container, are provided for.

Title
Enhanced pressure measurement flow control system
Application Number
836023
Publication Number
4976162
Application Date
May 1, 1989
Publication Date
December 11, 1990
Inventor
Dean L Kamen
44 Gage Rd., Bedford, 03102
NH, US
Agent
Bromberg & Sunstein
IPC
G01F 17/00
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