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. 07, 1995
Filed:
Sep. 14, 1992
Wilfried Schilling, Kraichtal-Mue, DE;
Robert Kicherer, Oberderdingen, DE;
Abstract
A heating unit (1) for a cooking point has an outer heater (3) and an inner heater (4) located concentrically for separately heating an associated surface area (13, 14) of the overall heating surface (2). The two heaters (3, 4) can be differently regulated such that supplied power is periodically switched over and distributed in very short, but variable time intervals in a continuously alternating manner to the two heaters (3, 4). Switching over takes place in the passage of the alternating current characteristic through the zero line. Thus, without influencing a clicking rate, there can be a random power distribution on at least two surface areas (13, 14) of the same heating surface (2) and a high efficiency with a relatively simple control (10).