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US 4,070,896 AGranted
Press brake with improved ram leveling adjustment
AssigneeWysong & Miles Company
InventorRaymond J. Heitner
Life of this patent
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AssigneeWysong & Miles Company
InventorRaymond J. Heitner
Estimating the term…
A press brake having improved ram leveling adjustment is disclosed. The press brake is preferably one having a hydraulic-mechanical power actuator for advancing and returning the ram. The power actuator includes a pair of bell cranks pivotally supported on an upright frame by a pair of horizontally spaced pivots, a hydraulic piston and cylinder motor for oscillating one of the bell cranks, and a link connecting like arms of the bell crank for causing parallel motion of the bell cranks. Leveling adjustment of the ram is obtained by providing horizontally spaced parallel links which are independently adjustable in length to interconnect the ram and second like arms of the bell cranks. An independently controlled reversible motor is operatively associated with each adjustable link for selectively lengthening or shortening the link, and an indicator is associated with each link to indicate position adjustment of each link.
A press brake comprising an upstanding frame, a ram having opposite ends and hydraulic-mechanical power means for advancing and returning said ram, said power means including a pair of bell cranks each of which includes a fulcrum and first and second angularly related arms extending outwardly from said fulcrum and forming substantially a right angle therebetween, a pair of horizontally spaced pivot means for pivotally supporting said bell cranks about their fulcrums from said frame with said fulcrums at substantially the same level on said frame, hydraulic motor means connected between said frame and one of said bell cranks for oscillating said one bell crank about its fulcrum, link means pivotally interconnecting the first arm of said pair of bell cranks for causing parallel pivotal motion of said bell cranks, a pair of adjustable links pivotally supporting said ram from the second arm of said bell cranks, each link of said pair of adjustable links being independently adjustable in length for leveling said ram, and a pair of independently controlled reversible motor means for selectively lengthening and shortening each of said adjustable links.
A press brake comprising an upstanding frame, a stationary bed, a ram having opposite end portions and power means for advancing and returning said ram relative to said stationary bed, said power means including a pair of horizontally spaced bell cranks, each having a fulcrum and a pair of angularly related lever arms intersecting each other at said fulcrum, a pair of horizontally spaced parallel pivots pivotally mounting said bell cranks on said frame to rotate in substantially the same plane, link means interconnecting said bell cranks for causing parallel motion thereof, motor means for oscillating said bell cranks, a pair of adjustable links connecting opposite end portions of said ram to corresponding lever arms of said pair of bell cranks, each link of said pair of adjustable links being independently adjustable in length for leveling said ram, and a pair of independently controlled reversible motor means for selectively lengthening and shortening said adjustable links, one of said reversible motor means being operatively associated with one of said adjustable links and the other of said reversible motor means being operatively associated with the other of said adjustable links.
A press brake comprising an upstanding frame, a stationary bed, a ram having opposite end portions, power means on said frame for advancing and retracting said ram relative to said stationary bed, and a pair of adjustable links operatively connecting opposite end portions of said ram with said power means, each link of said pair of adjustable links being independently adjustable in length for leveling said ram, and a pair of independently controlled reversible motor means for lengthening and shortening each of said adjustable links.
Dependencies are inferred from the claim text.