Blades for fluid flow machines

Claim 1

A BLADE ADAPTED FOR USE IN A FLUID FLOW MACHINE SAID BLADE HAVING A ROOT AND A TIP, TWO FLUID CONDUITS FORMED IN SAID BLADE AND EXTENDING FROM SUBSTANTIALLY THE ROOT TO THE TIP THEREOF, AN INLET TO EACH SAID FLUID CONDUIT, THROUGH WHICH A BLADE COOLING FLUID MAY BE INTRODUCED INTO SAID FLUID CONDUITS, TWO SINUOUS FLUID PASSAGEWAY FORMED IN SAID BLADE, EACH OF SAID SINUOUS FLUID PASSAGEWAY COMPRISING A SERIES OF SPACED FLUID PASSAGES WHICH ALSO EXTEND SUBSTANTIALLY FROM THE ROOT TO THE TIP OF THE BLADE, FLUID PATHS WHICH ARE ALTERNATELY ARRANGED ADJACENT TO THE ROOT AND TIP OF THE BLADE, CONNECTING SAID FLUID PASSAGES TOGETHER, ONE FLUID PASSAGE OF EACH SINUOUS FLUID PASSAGEWAY BEING DISPOSED ADJACENT THE LEADING AND TRAILING EDGES OF THE BLADE RESPECTIVELY AND COMMUNICATING WITH THEIR RESPECTIVE FLUID CONDUITS BY WAY OF DRILLINGS DISPOSED ADJACENT THE MID-HEIGHT OF THE BLADE, BLADE COOLING FLUID PASSING THROUGH SAID DRILLING FORMING JETS WHICH COOL THE SAID LEADING AND TRAILING EDGES ADJACENT THE MIDHEIGHTS OF THE BLADE, ONE FLUID PASSAGE OF EACH SINUOUS FLUID PASSAGEWAY BEING PROVIDED WITH AN OUTLET THROUGH WHICH BLADE COOLING FLUID MAY PASS OUT OF THE BLADE, EACH