Open back brake
AssigneeTapco International Corporation
InventorMichael C. Clark
Life of this patent
Estimating the term…
Abstract
A sheet bending brake for forming a workpiece comprises a base and an anvil having a bottom-clamping surface. The anvil is positioned in a fixed spaced relationship above the base and in combination with the base defines an unobstructed passage therebetween for receiving at least a portion of the workpiece. A movable plate is disposed between the base and the top plate wherein the movable plate is vertically translatable therein for clamping the workpiece between a top surface of the movable plate and the bottom clamping surface. A bending member is pivotally attached to the movable plate and extends longitudinally therealong for bending the clamped workpiece.
Claims20
A sheet bending brake assembly comprising:
- a base with first and second ends;
- an anvil supported at a vertically spaced distance from said base and aligned with said base between said first and second ends;
- a hinge plate disposed above said base and extending longitudinally between said first and second ends;
- a bending member pivotally attached to said hinge plate for bending a workpiece clamped between said hinge plate and said anvil;
- and
- said assembly characterized by a mechanism movably supporting said hinge plate and for moving said hinge plate toward said anvil to clamp the workpiece therebetween.
The assembly according to claim I further including a spacer disposed between said anvil and said base at each of said first and said second ends for vertically supporting said anvil in said spaced distance from said base.
A sheet bending brake for forming a workpiece, said brake comprising:
- a base;
- an anvil having a bottom clamping surface, said anvil in a fixed spaced relationship above said base and defining an unobstructed passage therebetween for receiving at least a portion of the workpiece of any length;
- a movable plate disposed between said base and said top plate, said movable plate vertically translatable therein for clamping the workpiece between a top surface of said movable plate and said bottom clamping surface;
- and
- a bending member pivotally attached to said movable plate and extending longitudinally therealong for bending the clamped workpiece.
A method of clamping an article of sheet material in a sheet bending brake, wherein the sheet bending brake is of the type having a base, an anvil in a fixed spaced relationship above the base and defining a passage therebetween, a movable plate in the passage and vertically translatable therein and a cam bar between the base and the movable plate wherein the cam bar and the movable member have opposing cooperative cam surfaces, said method comprising the steps of:
- placing the article of sheet material between the movable plate and the anvil;
- translating the cam bar horizontally;
- allowing the translation of the cam surfaces one against the other;
- causing the movable plate to rise as a result of translation of the cam surfaces one against the other;
- applying sufficient horizontal force on the cam bar to firmly clamp the workpiece between the anvil and the movable plate.
Dependencies are inferred from the claim text.