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:
Jul. 18, 2000
Filed:
Nov. 10, 1998
Stephan Habijanec, Krailling, DE;
Maximilian Hellwig, Gauting, DE;
Webasto Thermosysteme GmbH, Stockdorf, DE;
Abstract
A heater, especially an auxiliary motor vehicle heater, with a burner in a combustion chamber (2) which is surrounded by a generally pot-shaped, die cast heat exchanger (4) which has inner and outer parts (5, 6) and between which an intermediate space (11, 12) is formed through which a heat exchange medium flows, the combustion gases emerging from the combustion chamber (2) being discharged via a exhaust outlet connection (23). To increase the heat transfer efficiency and to minimize the size of the heater, on the outside of the open end of the heat exchanger inner part (5) a ring (15) is provided which projects, spaced apart from the outer peripheral wall (7) of the inner part, toward the bottoms (8, 10) of the heat exchanger parts. The intermediate space (11, 12) continues from between the peripheral walls (7, 9) of the inner and outer heat exchanger parts to between the ring (15) and the peripheral wall (7) of the inner part (5). The free end of the ring (15) of the inner part (6) tightly adjoins the open end of the heat exchanger outer part (6). The exhaust outlet connection (23) penetrates the ring (15), the intermediate space (11) and the inner part (5).