Cutting wheels for mining machines and the like with replaceable cutter bearing rims

Claim 1

IN A CUTTING DEVICE FOR ATTACHMENT TO A DRIVEN SHAFT OF A MINING MACHINE, A WHEEL-LIKE ELEMENT HAVING A HUB FOR ENGAGING THE SHAFT, A RIM, AND MEANS INTERCONNECTING THE RIM AND HUB, AN OUTER RIM SURROUNDING THE FIRST MENTIONED RIM AND RESILIENT MEANS INTERPOSED BETWEEN THE SAID RIMS FOR DRIVING THE OUTER RIM FROM THE FIRST MENTIONED RIM, CUTTER ELEMENTS ASSOCIATED WITH AND DRIVEN BY SAID OUTER RIM, SAID RESILIENT MEANS COMPRISING A HOLLOW ANNULAR MEMBER LOCATED BETWEEN SAID RIMS AND PARTIALLY ENGAGING IN HOLLOWS IN THE APPROACHING FACES OF THE SAID RIMS, SAID APPROACHING FACES OF SAID RIMS LYING ADJACENT TO ONE ANOTHER, SAID RESILIENT MEMBER BEING OF RUBBERLIKE COMPOSITION AND PROVIDED WITH A VALVE WHEREBY IT MAY BE INFLATED AND DELFATED WITH FLUID PRESSURE, SAID RESILIENT MEANS BEING FLEXIBLE AND CAPABLE WHEN DEFLATED OF LAYING SUBSTANTIALLY WHOLLY WITHIN ONE OF SAID HOLLOWS.