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, 1977
Filed:
Sep. 23, 1976
Applicant:
Inventor:
Richard L Stone, Los Altos Hills, CA (US);
Assignee:
Wallace-Murray Corporation, Belmont, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F16L / ;
U.S. Cl.
CPC ...
285 47 ; 2851 / ; 285302 ; 285373 ;
Abstract
An expansion and length adjustment joint for a prefabricated double-walled metal chimney is disclosed. The joint provides for easy installation of the chimney at a job site without cutting of chimney sections. To prevent escape of flue gases, at least one gasket is positioned on one inner wall member for sliding engagement against the other inner wall member.