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:
Apr. 11, 1995
Filed:
Jun. 14, 1993
Patrick L O'Connor, Dryden, MI (US);
Thermal Power Corporation, Almont, MI (US);
Abstract
A full depth thermal crack in an asphaltic pavement is repaired by spraying a first rejuvenating agent into the sides of the crack and over the top portion of the asphalt pavement surrounding the crack, heating the top portion of the asphalt to a predetermined temperature greater than 700.degree. F., scarifying the heated asphalt, adding an asphaltic rejuvenating/emulsion agent to the heated, scarified asphalt, compacting the heated, scarified asphalt into the crack for the full depth of the crack wherein heat in the asphalt added to the crack is transferred to the asphalt surrounding the crack to raise the temperature of the surrounding asphalt sufficient to form a homogeneous bond between the original and new asphalt added to the crack. In a preferred embodiment, the heated, scarified asphalt is added in predetermined quantities into the crack so as to fill the crack only to a predetermined depth and then compacted before additional quantities of asphalt are added and compacted in subsequent steps.