Tire tread cutting or grooving tool

Claim 1

A TOOL FOR MAKING NON0-SKID CUTS PERIPHERALLY AROUND THE TREAD PORTION OF AN INFLATED PNEUMATIC TIRE FIXEDLY MOUNTED ON A TIRE MOUNTING TABLE HAVING AN UPSTANDING CENTER POST ROTATABLY RECEIVING SAID CENTER POST TO SUPPORT THE SOCKET MEMBER THEREON; SAID SOCKET MEMBER HAVING AN ARM THEREON ADAPTED TO EXTEND RADIALLY OF A CENTRAL VERTICAL AXIS OF THE SOCKET MEMBER MOUNTED ON SAID CENTER POST; A CUTTER SUPPORT CARRIED BY SAID ARM AND HAVING SPACED ROLLER MEANS FOR ENGAGEMENT WITH CIRCUMFERENTIALLY SPACED PORTIONS OF THE TIRE TREAD; SAID CUTTER SUPPORT HAVING A RADIALLY INWARDLY PRESENTED TREAD-ENGAGING STOP PORTION INTERMEDIATE SAID ROLLER MEANS; CUTTER MEANS AFFIXED ON SAID CUTTER SUPPORT TO PROJECT RADIALLY OF SAID CENTER POST AND INWARDLY BEYOND SAID STOP PORTION A PREDETERMINED EXTENT; AND ADJUSTABLE MEANS FOR URGING SAID CUTTER SUPPORT RADIALLY INWARDLY OF SAID SOCKET MEMBER FOR YIELDINGLY DEPRESSING SAID SPACED ROLLER MEANS INTO THE TIRE TREAD, AND THEREBY TO EXPAND THE TREAD PORTIONS INTERMEDIATE THE TREAD PORTIONS DEPRESSED BY ROLLER MEANS RADIALLY OUTWARDLY INTO FRICTIONAL ENGAGEMENT WITH SAID STOP PORTION, AND THEREBY CONTINUOUSLY TO MAINTAIN SAID PROJECTING CUTTER MEANS IN CONSTANT UNIFORM CUTTING DEPTH WITHIN TIRE TREAD AS SAID ARM IS ROTATED RELATIVELY OF THE TIRE; VARIABLE MEANS BEING PROVIDED ON SAID SOCKET MEMBER TO VARY THE SUPPORT OF THE SAME AXIALLY ON SAID CENTER POST, AND CORRESPONDINGLY TO VARY THE CUTTING POSITION OF SAID CUTTER MEANS TRANSVERSELY OF THE TIRE TREAD PORTION; SAID VARIABLE MEANS INCLUDING A STEM ADJUSTABLY THREADED IN SAID SOCKET MEMBER TO HAVE AN INNER END OF THE STEM ROTATABLY BUT NON-THREADEDLY SUPPORTED ON THE UPPER END OF THE CENTER POST, SAID STEM HAVING MEANS FOR RELATIVELY RESTRAINING ROTATION THEREOF WITH RESPECT TO SAID SOCKET MEMBER UPON ROTATION OF THE SAME WITH THE CENTER POST, AND THEREBY TO EFFECT AXIAL ADJUSTMENT OF THE SOCKET MEMBER ON SAID CENTER POST.