Displacement metering with independent ancillary flow

US4001678A · kind A · utility

Inventor

• Robert H. Berg · Elmhurst, US

Key dates

• Filing date: Jun 16, 1975
• Grant date: Jan 4, 1977
• Expiry date: Jun 16, 1995

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T137/4259
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

Displacement metering with two independently metered fluid flows comprises displacing fluid in laminar filament flow from a first chamber through a second chamber into a third chamber, the chambers being separated by a pair of spaced walls provided with coaxially aligned orifices in communicating series relationship. Flow in filamentary form is effected from the first chamber through the orifices seriatim into the third chamber, and flow is effected from the second chamber through the second orifice into the third chamber in sheathing relation to the filamentary flow. Differential pressure effects the flow from first to third chamber independently but concurrently with positive displacement effecting flow from the second chamber into the third chamber.