Michael L Aiton

US Patent:

6810755, Nov 2, 2004

Filed:

Dec 11, 2002

Appl. No.:

10/317829

Inventors:

David A. Pask - Morgantown WV
Michael L. Aiton - Point Marion PA

Assignee:

West Virginia University - Morgantown WV

International Classification:

G01N 100

US Classification:

73863, 7386443, 73 38, 7315241

Abstract:

A permeameter having a hollow tube with a second tube slidably disposed within an internal chamber of the hollow tube, used in combination with one or more tables each of which correlates a specific rate of reading fall rate of water within the hollow tube with a unique soil hydraulic capacity of the soil being tested. The second tube has an air hole and a slot which are used in causing water contained in the hollow tube to seep into an auger hole. A reducing connector is secured to the bottom of the hollow tube which provides the means for maintaining the second tube within the internal chamber of the hollow tube. The second tube is secured in the extended position by a compression fitting attached to the reducing connector. A conventional measuring tape, having consecutive markings showing continuous Â, Â, and 1 inch distances, is affixed to the outside surface of the hollow tube such that the numbers extend vertically along the length, or longitudinal central axis, of the hollow tube. The permeameter is used in combination with one or more charts which maps a range of reading fall rates with a corresponding soil hydraulic capacity.