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:
Apr. 13, 1982
Filed:
Sep. 22, 1980
Gordon F Hubbert, Plymouth, MI (US);
Gladd Industries, Inc., Detroit, MI (US);
Abstract
A recirculating processing oven heater (10) disclosed includes first and second flow paths (22,26) with an internal heat exchanger (36) located downstream from a burner (24) and upstream from a conical mixing member (28) that deflects gas from the first path outwardly for mixing with bypass gas that flows along the second path. Thermal incineration of unburned combustible gases takes place along the first path (22) after heating thereof by the burner and prior to passage thereof through the internal heat exchanger (36). Heat extracted by the internal heat exchanger (36) is supplied to the upstream end of one of the flow paths (22,26), preferably the first flow path (22) so as to provide most efficient operation of the heater. An internal control valve (58) positioned between the internal heat exchanger (36) and the mixing member (28) along the first path controls the relative rate of gas flow along each path under the impetus of a suction blower (34) within a mixing chamber (32) downstream from the mixing member. A fresh air inlet (62) to the mixing chamber (32), an exhaust gas outlet (64) adjacent the internal control valve (58), and a secondary heat exchanger (70) with an associated control valve (78) coupled to the internal control valve (58) cooperate to provide efficient operation of the heater.