B - Operations – Transporting – 21 – D
Patent
B - Operations, Transporting
21
D
153/42
B21D 5/04 (2006.01)
Patent
CA 1288675
PORTABLE SHEET BENDING BRAKE Abstract of the Disclosure A sheet bending brake comprising a plurality of C- shaped frame members that support a first member. The first member has a clamping surface. A second member is hinged to the first member and has a bending surface. A plurality of bars are pivoted to the frame members and support an anvil member that extends longitudinally of the first member. A plurality of eccentric cams are secured on a cam support shaft. Each bar is generally C-shaped in cross section and a cam is positioned between the upper and lower flanges thereof. A handle is secured to the shaft such that when the handle is operated, the eccentric cams are rotated to move the bars and, in turn, the anvil member into and out of clamping position with respect to the clamping surface. The cam support shaft is supported on the frame members by plastic bearings fixed in openings on the frame members and having tapered sides such that when the handle is operated to rotate the cams, the cam support shaft is shifted vertically and wedges against the sides of the openings of the plastic bearings. The wedging action accommodates variations in the thickness of the workpiece and locks the cams holding the anvil against the clamping surface.
520705
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