Oil filter and heater

Claim 1

A FILTER AND HEATING DEVICE INCLUDING A HEAD FOR A PERIPHERAL FLANGE AND A CONCENTRIC INNER SLEEVE, SAID SLEEVE BEING IMPERVIOUS, SAID FLANGE AND SLEEVE DEFINING BETWEEN THEM A FILTER SPACE, A FILTER ELEMENT POSITIONED THEREIN AND RADIALLY SPACED FROM SAID IMPERVIOUS SLEEVE, A BASE HAVING A PROJECTING PERIPHERAL FLANGE IN SLIDING ENGAGEMENT WITH THE PERIPHERAL FLANGE ON THE HEAD AND COOPERATING TO CLOSE THE FILTER SPACE, SAID BASE HAVING A CENTRAL OPENING FITTING OVER THE INNER SLEEVE, A CAP FITTING OVER THE END OF THE SLEEVE FOR SECURING THE BASE IN POSITION AND DEFINING THEREIN A CHAMBER AT THE END OF THE SLEEVE, AN AIR INLET AND AN AIR OUTLET SECURED TO SAID HEAD, A PLURALITY OF TUBES EXTENDING LONGITUDINALLY THROUGH SAID SLEEVE AND COMMUNICATING WITH SAID CHAMBER, AT LEAST ONE OF SAID TUBES COMMUNICATING WITHIN THE HEAD WITH THE AIR INLET AND THE REMAINDER OF THE TUBES COMMUNICATING WITHIN THE HEAD WITH THE AIR OUTLET THEREBY TO ESTABLISH A FLOW OF AIR FROM THE AIR INLET THROUGH THE TUBES CONNECTED THEREWITH TO THE CHAMBER AND THENCE THROUGH THE TUBES CONNECTED WITH THE AIR OUTLET AND TO THE OUTLET, FUEL INLET MEANS ON THE HEAD COMMUNICATING WITH THE INTERIOR OF SAID SLEEVE, THE FUEL PASSING AROUND THE SHELL SIDE OF SAID TUBES AND BEING HEATED THEREBY, PASSAGES THROUGH THE SLEEVE ADJACENT THE CAP FOR THE FLOW OF SAID HEATED FUEL FROM WITHIN THE SLEEVE THROUGH THE PASSAGES TO THE EXTERNAL SIDE OF THE FILTER WITHIN THE FILTER SPACE AND THENCE THROUGH THE FILTER INTO SAID RADIAL SPACE BETWEEN SAID FILTER AND SAID IMPERVIOUS SLEEVE, AND INTO THE FILTER SPACE AND A FUEL OUTLET ON THE HEAD COMMUNICATING WITH SAID RADIAL SPACE ADJACENT THE HEAD END THEREOF.