Heating unit for heating fluid
Patent 4162395 Issued on July 24, 1979. Estimated Expiration Date: 
July 24, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
July 24, 1996. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorsAssigneeApplicationNo. 05/692526 filed on 06/03/1976US Classes:392/485, Heated line section with heating element internal of flow path219/504, Comprising variable resistance means219/536, With heating unit mounting or attaching means219/537, Plural units combined with single casing housing or support392/360, Forced air type392/379, Concentrated heated air stream (i.e., blast)392/502Having positive temperature coefficientExaminersPrimary: Truhe, J. V.Assistant: Roskoski, Bernard Attorney, Agent or FirmInternational ClassesH05B 3/22 (20060101)H05B 3/24 (20060101) H05B 3/06 (20060101) H05B 3/14 (20060101) F24H 3/04 (20060101) H01C 7/02 (20060101) H01C 1/14 (20060101) Foreign Application Priority Data1975-11-07 JPAbstractThe present disclosure relates to a heating unit for heating fluid such as air, in which a plurality of positive temperature coefficient (PTC) semiconductors are aligned in parallel to define clearances between each PTC semiconductor for the passage of the fluid. Each PTC semiconductor is provided with two electrodes disposed on the surface thereof for rapidly generating heat therefrom.Field of SearchWith open frame or grid-type supportWith heating unit mounting or attaching means Plural units combined with single casing housing or support Comprising variable resistance means Comprising nonlinear or negative temperature coefficient resistance means Static structure (e.g., building pavement, etc.) With heating unit structure Comprising plural separate and distinct resistive elements | |
