Metal deforming – With means to drive tool – With means to selectably control movement of tool
Patent
1972-09-05
1978-06-13
Lanham, C.W.
Metal deforming
With means to drive tool
With means to selectably control movement of tool
72705, 254198, B21D 114
Patent
active
RE0296643
ABSTRACT:
Hydraulic pulley apparatus including a frame, anchored to a tiedown assembly, supporting a first pulley on a movable axis and a second pulley on a selectably fixed axis. A cable or chain extends over the first and second pulleys and is connected at one end to the frame, with the other end being attached to a workpiece. The pulleys are arranged in such a manner that movement of the first pulley away from the second pulley draws the end of the chain attached to the workpiece toward the second pulley. The movement of the first pulley is accomplished by selectively operable and controllable hydraulic power means. A third pulley may be mounted on the frame at various positions above the first and second pulleys for receiving the end of the chain attached to the workpiece, and maintaining the chain at various attitudes. Locking means hold the chain under tension to permit release of the hydraulic power means for sequential operation thereof.
REFERENCES:
patent: 316070 (1885-04-01), Shaw
patent: 1810680 (1931-06-01), Rothgarn
patent: 2426114 (1947-08-01), Novotney
patent: 3078075 (1963-02-01), Richter
patent: 3149660 (1964-09-01), Smith
patent: 3275170 (1966-09-01), MacRay
patent: 3338083 (1967-08-01), Eck
patent: 3340720 (1967-09-01), Chartier
Crosby Gene P.
Kansas Jack, Inc.
Lanham C.W.
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