Constant stress diffusion cell with controllable moisture content

US6076395A · kind A · utility

Assignee

• The United States Army Corps of Engineers as represented by the Secretary of the Army · US

Inventors

• Patrick B. Black · Somerville, US
• Timothy Andrew Hansen · Raleigh, US
• Robert Anderson · Long Beach, US

Key dates

• Filing date: Feb 5, 1998
• Grant date: Jun 20, 2000
• Expiry date: Feb 5, 2018

Classification

• Technology area (CPC G): Physics
• CPC primary: G01N2013/003
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A device for measuring the concentration changes of a vapor at various moisture contents ranging from saturation to dry and under different confining stress as it diffuses through a porous media which includes a porous central housing having a central space and a fluid conveying line extending into the central space of the central housing and an outer housing which encompasses for containment of the central housing and is positioned in an outward spaced relation from the central housing to form a medial space, between the external housing and the internal housing and having a second fluid conveying line extending into the medial space.