Silencer and heat exchanger device

Claim 1

A SILENCER FOR AN APERTURE OF A DEVICE THROUGH WHICH A FLOW OF GAS PASSES COMPRISING A STRUCTURE FORMING A HOUSING HAVING SPACED WALLS PORTIONS, ONE OF SAID WALL PORTIONS HAVING AN OPENING FOR CONNECTION TO THE APERTURE, AT LEAST ONE OF SAID WALLS PORTIONS HAVING AN ADDITIONAL OPENING DISPOSED THEREIN, SAID HOUSING IN ITS OPERATIVE CONDITION FORMING A PASSAGE FOR RECEIVING A FLOW OF GAS MOVING ALONG FLOW LINES BETWEEN SAID OPENINGS, A HEAT EXCHANGER DISPOSED WITHIN SAID HOUSING, SAID HEAT EXCHANGER HAVING A MEMBER FOR CONDUCTING A FLUID WITH RESPECT TO WHICH HEAT IS TO BE TRANSFERRED AND AN EXTENDED SURFACE ON SAID MEMBER FOR TRANSFERRING HEAT THEREIN SAID FLUID AND THE FLOW OF GAS, SAID EXTENDED SURFACE DIVIDING SAID PASSAGE INTO A PLURALITY OF ADDITIONAL PASSAGES THROUGH WHICH THE FLOW LINES EXTEND, AND SOUND ABSORBING MATERIAL DISPOSED WITHIN SAID HOUSING ADJACENT THE INLET AND THE OUTLET PORTIONS OF SAID ADDITIONAL PASSAGES FOR ABSORBING SOUND TRAVELLING PARALLEL TO AT LEAST A PORTION OF THE FLOW LINES, WHEREBY THE ADDITIONAL PASSAGES FORMED BY SAID EXTENDED SURFACE DIRECT THE NOISE FROM THE APERTURE TOWARDS SAID SOUND ABSORBING MATERIAL IN ORDER TO RETARD THE PROPAGATION OF THE NOISE FROM SAID APERTURE.