| US 7,412,862 B2 | ||
| Sheet bending brake | ||
| Carl Anderson, Scranton, Pa. (US); and Kevin Jablonski, Scranton, Pa. (US) | ||
| Assigned to Alum-A-Pole Corporation, Scranton, Pa. (US) | ||
| Filed on Jan. 05, 2006, as Appl. No. 11/326,586. | ||
| Claims priority of provisional application 60/641497, filed on Jan. 05, 2005. | ||
| Prior Publication US 2006/0191309 A1, Aug. 31, 2006 | ||
| Int. Cl. B21D 5/04 (2006.01); B21D 43/28 (2006.01) | ||
| U.S. Cl. 72—31.1 [72/294; 72/319] | 26 Claims |
| 1. A bending brake for sheet material, the bending brake comprising:
a plurality of frames;
an upper jaw and a lower jaw cooperating to hold the sheet material, each jaw mounted to each frame of the plurality of frames;
a bending surface pivotally connected to the lower jaw to bend the sheet material against an anvil of the upper jaw;
an interlocking unit connected to the frame, the interlocking unit comprising a cam surface having a locking position in the
form of a surface irregularity; and
an elongated pipe assembly for rotation by a user, the elongated pipe assembly bearing against the cam surface and resting
in the surface irregularity of the locking position to positively lock the elongated pipe assembly and to clamp the sheet
material with reduced freedom of play.
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