EP 0027175 A3 19810909 - SHUT-OFF SYSTEM FOR FLUE GAS EXHAUST CONDUITS OR SUCTION AIR CONDUITS OF OIL AND GAS FIREPLACES
Title (en)
SHUT-OFF SYSTEM FOR FLUE GAS EXHAUST CONDUITS OR SUCTION AIR CONDUITS OF OIL AND GAS FIREPLACES
Publication
Application
Priority
DE 2936296 A 19790907
Abstract (en)
[origin: US4369718A] An energy-saving closure system is provided for use in preventing needless energy loss. The system employs a pivotal closure adapted to alternately move between the fully open and fully closed portion in a conduit for conveying gases relative to a combustion zone. The closure requires pressure diffentials only for being urged into the open and closed positions such as normally occur in the heating cycle. No energy-consuming, auxiliary apparatus is needed.
IPC 1-7
IPC 8 full level
F23L 3/00 (2006.01); F23L 11/00 (2006.01); F23L 13/02 (2006.01)
CPC (source: EP US)
F23L 3/00 (2013.01 - EP US); F23L 11/005 (2013.01 - EP US); F23L 13/02 (2013.01 - EP US)
Citation (search report)
- DE 627811 C 19360324 - BERNHARD MEINEN
- DE 84317 C
- US 1988539 A 19350122 - WAYNE BOWERSOX MARVIN
- US 1973600 A 19340911 - HECTOR BEAIRSTO JOHN
- [X] US 1946568 A 19340213 - BUTLER WILLIAM L, et al
- US 1943342 A 19340116 - MORTIMER WINFIELD F
- US 3087677 A 19630430 - PATRICK MALCOLM W
- US 2721705 A 19551025 - PATRICK MALCOM W
Designated contracting state (EPC)
AT BE CH FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0027175 A2 19810422; EP 0027175 A3 19810909; DE 2936296 A1 19810319; DE 2936296 C2 19821230; JP S56105214 A 19810821; NO 151512 B 19850107; NO 151512 C 19850424; NO 802620 L 19810309; US 4369718 A 19830125
DOCDB simple family (application)
EP 80105324 A 19800905; DE 2936296 A 19790907; JP 12446680 A 19800908; NO 802620 A 19800904; US 18509880 A 19800908