Hand-operated hydraulic puller with readily removable and cammed pulling levers

Claim 1

AN HYDRAULIC PULLING DEVICE FOR EXERTING A STRONG FORCE ON A MEMBER TO BE PULLED RELATIVELY TO A STATIONARY MEMBER, INCLUDING IN COMBINATION A HOUSING PROVIDING A MAIN CYLINDER, AN OIL RESERVOIR, AND A PASSAGEWAY CONNECTING SAID RESERVOIR TO SAID CYLINDER, A CHECK VALVE IN SAID PASSAGEWAY, A MAIN PISTON IN SAID MAIN CYLINDER, HAVING AN EXTENSION ADAPTED TO BEAR AGAINST SAID STATIONARY MEMBER DURING PULLING, PUMP MEANS FOR FORCING HYDRAULIC FLUID FROM SAID RESERVOIR INTO SAID CYLINDER VIA SAID CHECK VALVE, RELEASE MEANS FOR RETURNING HYDRAULIC FLUID FROM THE CYLINDER TO THE RESERVOIR AFTER COMPLETION OF THE PULLING OPERATION, SAID HOUSING HAVING RECESS MEANS AROUND ITS OUTER PERIPHERY ADJACENT THE LOWER END THEREOF, A SERIES OF READILY DETACHABLE GRIPPER ARMS HAVING AXIALLY EXTENDING PORTIONS WITH A CAM PORTION OF ONE END TERMINATING IN DOG-LIKE ENDS ENGAGEABLE IN SAID RECESS MEANS AND INWARDLY EXTENDING FINGERS AT THE OTHER END OF SAID AXIALLY ENTENDING PORTION OF GRIPPING SAID MEMBER TO BE PULLED, AND A COLLET MEMBER HAVING A LOWER FRUSTOCONICAL FACE ADAPTED TO ENGAGE AGAINST SAID CAM PORTIONS OF SAID GRIPPER ARMS TO HOLD SAID ENDS THEREOF IN SAID RECESS MEANS AND TO FORCE THE GRIPPER ARMS TO SWING THEIR FINGERS RADIALLY INWARDLY.