EP 0045351 B1 19850410 - NON-RETURN VALVE FOR RECTANGULAR GAS DUCTS
Title (en)
NON-RETURN VALVE FOR RECTANGULAR GAS DUCTS
Publication
Application
Priority
DE 8021092 U 19800806
Abstract (en)
[origin: EP0045351A2] 1. A backpressure stop valve for use in rectangular gas-conducting passages, comprising a frame (2) adapted to be inserted into a passage and having substantially flat outer surfaces, and comprising closure means secured to said frame (2) and pivotable in flap-fashion into sealing relationship against said frame (2), characterized in that a) said closure means is formed of two superposed flaps (3, 4) having their pivot axes disposed in the vicinity of the inlet port for a stream of gas within said frame (2), b) the height of each of said flaps (3, 4), which extends transversely to the pivot axis, is smaller than the depth of said frame (2), said frame (2) being of cuboid configuration and being disposed perpendicularly or, respectively, in parallel to the longitudinal extension of said passage, and c) a lower abutment (8) is provided at the bottom (5) of said frame (2) for the lower edge of the lower flap (4) and an upper abutment (9) is provided for the lower edge of the upper flap (3), the upper edge or, respectively, pivotable arrangement of said lower flap (4) simultaneously forming said abutment (9) for said lower edge of said upper flap (3).
IPC 1-7
IPC 8 full level
F24F 13/00 (2006.01)
CPC (source: EP)
F24F 13/00 (2013.01)
Citation (examination)
DE 2901877 A1 19800731 - MEISSNER & WURST
Designated contracting state (EPC)
BE DE FR GB NL
DOCDB simple family (publication)
EP 0045351 A2 19820210; EP 0045351 A3 19820331; EP 0045351 B1 19850410; DE 3169791 D1 19850515; DE 8021092 U1 19801106
DOCDB simple family (application)
EP 81103301 A 19810502; DE 3169791 T 19810502; DE 8021092 U 19800806