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:
Sep. 29, 1998
Filed:
Jul. 18, 1996
Brian O'Leary, Evanston, IL (US);
David S Harvey, Littleton, MA (US);
Francis C Nutter, Methuen, MA (US);
Martin I Soderlund, Westborough, MA (US);
BTU International, Inc., North Billerica, MA (US);
Abstract
A forced convection furnace gas plenum having a mixing chamber to provide a heated gas of a more uniform temperature is presented. The plenum includes a heating element for heating gas and an orifice plate for metering the flow of heated gas to product within the furnace. A heater plate having larger apertures than those of the orifice plate is disposed between the heating element and the orifice plate. The apertures in the heater plate are sized to allow heated gas to pass therethrough into the mixing chamber, located between the heater plate and the orifice plate, with minimal pressure loss. The heated gas mixes in the mixing chamber, causing the temperature to become more uniform before the gas exits through the orifice plate to impinge on the product.