Pressurized 4-ball wear tester

Claim 1

A HYDRAULIC FLUID TESTING DEVICE WHEREIN SAID FLUID IS SUBJECTED TO CONTROLLED ELEVATED TEMPERATURES AND PRESSURES, SAID DEVICE COMPRISING A PRESSURE VESSEL FOR CONTAINING SAID FLUID, A PRESSURE-TIGHT LID REMOVABLY MOUNTED ON SAID VESSEL, A FLUID INLET AND A FLUID AND AIR OUTLET SEALABLY MOUNTED ON SAID LID FOR CONTROLLING PRESSURES UP TO ABOUT 12,000 P.S.I. ON SAID FLUID WITHIN SAID VESSEL, A PLURALITY OF TEST BALLS DISPOSED CENTRALLY IMMOBILE AT A BASE PORTION WITHIN SAID VESSEL, AN UPPER BALL CONTACTING EACH OF SAID TEST BALLS, MEANS FOR MAINTAINING SAID UPPER BALL STATIONARY AND FOR SUPPORTING SAID UPPER BALL CENTRALLY OF SAID TEST BALLS AND IN CONTACTING RELATION THEREWITH, SAID MEANS COMPRISING A HOLLOW CYLINDRICAL WEIGHT CARRIER, SAID CARRIER INCLUDING AN ANNULAR LIP AT A LOWER PORTION THEREOF FOR CARRYING WEIGHTS THEREON AND A CHUCK AT THE LOWERMOST PORTION OF SAID CARRIER FOR ADJUSTABLY GRIPPING SAID UPPER BALL, AND OTHER MEANS FOR ROTATING SAID TEST BALLS WHILE SAID UPPER BALL REMAINS SUBSTANTIALLY STATIONARY.