Power-operated reciprocating tool with integral bearing block

Claim 1

IN A POWER-OPERATED RECIPROCATING TOOL OF THE TYPE COMPRISING A SPLIT HOUSING INCLUDING A PAIR OF COMPLEMENTARY MATING PORTIONS DETACHABLY SECURED TOGETHER, AND FURTHER COMPRISING A RECIPROCATING ASSEMBLY INCLUDING A RECIPROCATING SHAFT WITH A YOKE SECURED THERETO, AND A TOOL ELEMENT CARRIED BY THE RECIPROCATING SHAFT BEYOND THE HOUSING, THE IMPROVEMENT IN JOURNALING THE RECIPROCATING SHAFT IN THE HOUSING AND SIMULTANEOUSLY SUPPORTING THE RECIPROCATING ASSEMBLY FROM TWISTING ABOUT THE AXIS OF RECIPROCATION WHICH COMPRISES: (A) A ONE-PIECE BEARING BLOCK AND MEANS TO RETAIN SAID BLOCK BETWEEN THE MATING PORTIONS OF THE SPLIT HOUSING, AND TO PREVENT SAID BLOCK FROM TWISTING ABOUT THE AXIS OF RECIPROCATION; (B) SAID BLOCK COMPRISING A BODY PORTION FORMED WITH A BORE FOR JOURNALING THE RECIPROCATING SHAFT; AND (C) SAID BLOCK FURTHER COMPRISING A GUIDEWAY FORMED INTEGRALLY WITH SAID BODY PORTION AND EXTENDING THEREFROM PARALLEL TO THE AXIS OF RECIPROCATION; (D) WHEREBY THE YOKE IS SLIDABLY SUPPORTED ON SAID GUIDEWAY, AND WHEREBY THE RECIPROCATING ASSEMBLY IS PREVENTED FROM TWISTING ABOUT THE AXIS OF RECIPROCATION.