Track adjusting system

Claim 1

IN A CRAWLER SUPPORTED VEHICLE, SUCH AS A MOBILE EXCAVATING MACHINE, INCLUDING A FRAME HAVING AT LEAST ONE TRANSVERSELY EXTENDING CROSS MEMBER, ENDLESS BELT TRACKS ON OPPOSITE SIDES OF SAID VEHICLE SUPPORTING SAID FRAME FOR MOVEMENT ALONG THE GROUND, EACH OF SAID TRACKS BEING SUPPORTED BETWEEN AND EXTENDING AROUND LONGITUDINALLY SPACED ROTATABLE WHEEL-LIKE MEMBERS DISPOSED AT OPPOSITE ENDS OF THE RESPECTIVE TRACK, MEANS SUPPORTING SAID WHEEL-LIKE MEMBERS ON SAID FRAME, THE LAST MENTIONED SUPPORT MEANS INCLUDING MOVABLE MEANS MOUNTING AT LEAST ONE OF THE WHEEL-LIKE MEMBERS ON EACH SIDE OF THE VEHICLE, FOR LENGTHWISE MOVEMENT WITH RESPECT TO THE VEHICLE, SAID FRAME HAVING AN ELONGATED SLOT ON EACH SIDE THEREOF FOR MOUNTING A RESPECTIVE ONE OF SAID MOVABLE MEANS FOR LENGTHWISE MOVEMENT OF THE LATTER WITH RESPECT TO THE VEHICLE, AND MEANS FOR SIMULTANEOUSLY AND UNIFORMLY ADJUSTING THE TENSION IN EACH OF SAID TRACKS, SAID MEANS COMPRISING A SOURCE OF PRESSURIZED FLUID, RECIPROCAL FLUID ACTUATED MOTOR MEANS ON SAID FRAME COACTING WITH EACH OF SAID MOVABLE MEANS FOR MOVING THE LATTER IN A DIRECTION TO TENSION THE RESPECTIVE TRACK, FLUID TRANSMITTING MEANS COUPLING SAID MOTOR MEANS IN PARALLEL, OTHER FLUID TRANSMITTING MEANS COUPLING THE FIRST MENTIONED FLUID TRANSMITTING MEANS TO SAID SOURCE, AND FLUID PRESSURE RELIEF MEANS DISPOSED BETWEEN SAID SOURCE AND SAID FIRST MENTIONED FLUID TRANSMITTING MEANS FOR LIMITING THE APPLICATION OF FLUID PRESSURE TO SAID MOTOR MEANS TO A PREDETERMINED MAXIMUM, AND WHEREIN EACH OF SAID MOTOR MEANS IS DETACHABLY MOUNTED ON SAID FRAME FOR READY REMOVAL AND REPAIR, EACH OF SAID SLOTS BEING DEFINED BY AN INVERTED U-SHAPED STRUCTURE SECURED TO SAID FRAME, EACH OF SAID U-SHAPED STRUCTURES HAVING A LENGTHWISE EXTENDING OPENING IN ONE END THEREOF COMMUNICATING BETWEEN THE EXTERIOR OF SAID U-SHAPED STRUCTURE END AND THE RESPECTIVE SLOT, EACH OF SAID MOTOR MEANS AT ONE END THEREOF DETACHABLY EXTENDING THROUGH THE RESPECTIVE OPENING IN THE RESPECTIVE U-SHAPED STRUCTURE AND PROJECTING INTO THE RESPECTIVE SLOT IN ENGAGED RELATION WITH THE RESPECTIVE MOVABLE MEANS, DETACHABLE ABUTMENT MEANS AT ONE END THEREOF ENGAGING THE OTHER END OF EACH OF SAID MOTOR MEANS, THE OTHER END OF SAID ABUTMENT MEANS ENGAGING SAID TRANSVERSELY EXTENDING CROSS MEMBER, AND MEANS DETACHABLY COUPLING SAID MOTOR MEANS AND SAID ABUTMENT MEANS TO SAID CROSS MEMBER.