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:
Nov. 13, 1990
Filed:
Aug. 09, 1989
Applicant:
Inventors:
Tatsuhiko Chiba, Kawaguchi, JP;
Akira Obuchi, Kawasaki, JP;
Assignee:
Taisei Road Construction Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
E01C / ;
U.S. Cl.
CPC ...
404 77 ; 55 97 ;
Abstract
A road surface heating apparatus for repairing a deteriorated asphalt paved road includes an air shut out device with skirt members surrounding the heating panel so as to prevent air from entering into the heating apparatus, thereby restraining smoke generation. The generated smoke is filtered and purified by an after-burner and a catalyst burner and then exhausted, thus air pollution problems at the work site are solved.