Patent · US Expired

Micro delivery valve

US5230445A · kind A · utility

43Cited by
7References
5Claims
0Family size

Assignee

Inventor

Key dates

Filing dateSep 30, 1991
Grant dateJul 27, 1993
Priority date—
Expiry dateSep 30, 2011

Classification

  • Technology area (CPC G)Physics
  • CPC primaryG01F11/08
  • WIPO fieldMeasurement
  • WIPO sectorInstruments

Abstract

A pistonless device for metering a quantity of fluid from a source of fluid under pressure to a delivery line at a lesser pressure comprises a valve body defining a fluid flowpath, and including a fluid accumulator in fluid communication with the flowpath. An inlet valve upstream of the accumulator, and an exhaust valve downstream of the accumulator, are operated alternately in such a way that at most one of said valves is open at a time, so that positive metering displacement results.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.