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. 12, 1999
Filed:
Aug. 07, 1996
Applicant:
Inventors:
Stephen C Kirchner, Palatine, IL (US);
Andrei Illies, Chicago, IL (US);
Assignee:
Lakewood Engineering and Manufacturing Company, Chicago, IL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F24D / ;
U.S. Cl.
CPC ...
392357 ; 392377 ; 219540 ;
Abstract
An oil-filled heater (22) comprises a plate (34) welded onto the top opening in a fin of the heater. The plate (34) has a threaded opening (36), and a bolt (38) is threaded into the threaded opening (36) to seal the top opening. The bottom opening of the fin is sealed by a heating element (42) welded onto the fin. The present invention further relates to a method of filling the oil-filled heater (22).