Metal working – Means to assemble or disassemble – Puller or pusher means – contained force multiplying operator
Patent
1995-08-17
1999-04-27
Watson, Robert C.
Metal working
Means to assemble or disassemble
Puller or pusher means, contained force multiplying operator
B23P 1904
Patent
active
058966390
ABSTRACT:
A hydraulic puller for removing an element from an axle, including a hydraulic pipe, a pawl assembly mounted on the hydraulic pipe and controlled to catch the element to be removed from an axle, a movable rod movable fastened to the hydraulic pipe, and an oil tank assembly connected to the hydraulic pipe by a connecting pipe. The oil tank assembly comprising an air permeable oil container filled with a hydraulic oil and covered by a casing, and the casing having two air holes at two opposite locations. The hydraulic puller further having a hand lever, a piston rod moved by the hand lever to force the hydraulic oil out of the oil container late the hydraulic pipe to move the movable rod out of the hydraulic pipe, and spring means fastened to the hydraulic pipe to automatically move the movable rod back to its former position. The connecting pipe has an adjustment hole, a safety oil valve fastened to the adjustment hole by a rubber cushion and a safety screw to automatically regulate the inside pressure of the hydraulic pipe; and hand lever is pivoted to a holder plate rotatably mounted around the connecting pipe inside the casing.
REFERENCES:
patent: 2003756 (1935-06-01), Nagel
patent: 2484129 (1949-10-01), Taylor
patent: 5233740 (1993-08-01), Chen
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