The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 14, 1994
Filed:
Oct. 16, 1992
Stafford S Cooper, Vicksburg, MS (US);
Philip G Malone, Vicksburg, MS (US);
Gregory D Comes, Fort Collins, CO (US);
The United States of America as represented by the Secretary of the Army, Washington, DC (US);
Abstract
An air or gaseous fluid lubricated penetrometer reduces friction between the soil and the push rod string. Air is pumped into the interior of the string and is directed by exit ports into the annular space between the soil and the outer walls of the string. Without damaging the soil, the air prevents the soil from adhering to the sides of the string and thereby reduces frictional forces that restrict the downward movement thereof. The exit ports in the string are located above the instrument housing so that accurate measurements can be made on the soil properties.