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:
Oct. 08, 2019
Filed:
Dec. 01, 2016
Hamm Ag, Tirschenreuth, DE;
Johannes Pistrol, Mödling, AT;
Fritz Kopf, Vienna, AT;
Werner Völkel, Neustadt, DE;
Sebastian Villwock, Pechbrunn, DE;
Hamm AG, Tirschenreuth, DE;
Abstract
A method for determining the compaction state of a subgrade to be compacted using a roller compactor comprising at least one compactor drum having an oscillation-inducing arrangement and rotatable about a drum axis of rotation comprising the following steps: during at least one period of oscillating movement of the compactor drum, repeatedly determining the acceleration of the compactor drum in an first direction, representing a first acceleration value; in association with each first acceleration value, determining an acceleration of the compactor drum in a second direction representing a second acceleration value in order to provide acceleration value pairs, each consisting of a first acceleration value and a second associated acceleration value; and for at least one oscillation period, defining a compaction state value representing the compaction state of the subgrade based upon the period of oscillation determined for said acceleration value pairs.