EP 0251891 B1 19910410 - ELECTRICAL HEATING DEVICE WITH A METAL SURROUND
Title (en)
ELECTRICAL HEATING DEVICE WITH A METAL SURROUND
Publication
Application
Priority
FR 8609274 A 19860626
Abstract (en)
[origin: US4862137A] A resistance heating device having a longitudinal axis and a substantially cylindrical graphite heating element with a connecting part for connection to an electric power source. The device has a sheath surrounding the graphite heating element, radially spaced therefrom and defining a gas tight chamber about the graphite heating element, the sheath being made from a refractory alloy sheet having angularly distributed longitudinal corrugations and an internal surface arranged to directly receive over its whole area radiation emitted by the graphite heating element when energized.
IPC 1-7
IPC 8 full level
H05B 3/42 (2006.01); H05B 3/50 (2006.01); H05B 3/64 (2006.01)
CPC (source: EP US)
H05B 3/42 (2013.01 - EP US); H05B 3/50 (2013.01 - EP US); H05B 3/64 (2013.01 - EP US)
Designated contracting state (EPC)
BE CH DE ES GB IT LI SE
DOCDB simple family (publication)
EP 0251891 A1 19880107; EP 0251891 B1 19910410; CA 1295636 C 19920211; DE 3769214 D1 19910516; FR 2600855 A1 19871231; FR 2600855 B1 19880805; US 4862137 A 19890829
DOCDB simple family (application)
EP 87401436 A 19870623; CA 540752 A 19870626; DE 3769214 T 19870623; FR 8609274 A 19860626; US 6644387 A 19870626