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:
Mar. 22, 1994
Filed:
Dec. 11, 1991
Applicant:
Inventors:
Oliver J Whitfield, Bow, WA (US);
Phillip W Robertson, Mount Vernon, WA (US);
Abbas Dadkhah-Nikoo, Burlington, WA (US);
Craig G Wright, Bellingham, WA (US);
Assignee:
Pyro Industries, Inc., Burlington, WA (US);
Primary Examiner:
Int. Cl.
CPC ...
F23H / ;
U.S. Cl.
CPC ...
1261 / ; 126167 ; 1261 / ; 110293 ; 110327 ;
Abstract
Stoves fueled by biomass pellets are provided with a grate assembly that supports the pellets for combustion and directs combustion gas into the fire. The grate assembly includes a passive grate of unequally spaced rods. The design of the rods serves to prevent the ash and clinkers from accumulating on the grate in amounts that could reduce the flow of combustion gas into the fire.