Apparatus for bending material in the edgewise plane

• US 3,901,064 A
• Filed: 12/19/1974
• Issued: 08/26/1975
• Est. Priority Date: 12/19/1974
• Status: Expired due to Term

• Current Assignee: AMP Limited
• Original Assignee: James J. Jacobson
• Inventors: Jacobson, James J.
• Primary Examiner(s): Mehr, Milton S.
• Application Number:
  US05/534,447
• Time in Patent Office: 250 Days
• Field of Search: 72/217,219,149,157,319,457,458,388
• US Class Current: 72/388
• CPC Class Codes: B21D 7/022 over a stationary forming member only

Abstract

A combination hand-powered bending apparatus and edge bending radius pin assembly specifically adapted to bend flat stock in the edgewise plane. This combination provides a means whereby flat stock of varying thickness and width can be clamped in the apparatus by the edge bending radius pin assembly element and bent in the edgewise plane to varying angles.

Claims

1. A bender apparatus for bending material in the edgewise plane comprising a base, an edge bending radius pin assembly affixed to said base, clamping means mounted on said base and movable toward said radius pin assembly for clamping material and away from said radius pin assembly to a clearance position, a forming lever rotatably mounted on said base and having means for engaging said material when said material is clamped between said radius pin assembly and said clamping means to bend said material to a desired configuration about said radius pin assembly, said radius pin assembly including a pin of a radius complementary to the radius to be formed on the material, and plane guiding means retaining the material in the edgewise plane, said plane guiding means including a plane guiding plate coaxially positioned about said pin and clamping means engaged with said pin resiliently clamping said pin guiding plate on said pin clamping said material against said base.

2. The apparatus recited in claim 1 wherein said pin and said clamping means are cooperating to rigidly and adjustably position said clamping means at a selected position along the height of said pin.

3. The apparatus as recited in claim 1 wherein said pin is comprised of a rod having a threaded upper portion.

4. The apparatus as recited in claim 3 wherein said resilient clamping means is comprised of a conventional split ring lock washer coaxially positioned on said rod and a nut having a thread adapted to engage said threaded portion of said rod.

5. The apparatus as recited in claim 1 wherein the plane guiding plate is comprised of an annular ring, the width of said annular portion greater than the width of said material, said annular ring further having a truncated portion, the width of said portion less than the width of said material.

6. The apparatus as recited in claim 1 wherein said movable forming lever is pivoted on said base about said pin.

7. The apparatus as recited in claim 1 wherein the means for engaging said material is comprised of a forming pin projecting vertically from said forming lever, said pin being engageable with material to be formed and said forming lever being mounted for rotation in a clockwise and a counterclockwise direction for bending said material.

8. The apparatus as recited in claim 1 wherein said base has formed therein a plurality of holes adjacent said pin, stop means sized to be received in a selected one of said holes and engageable with said rotatable forming lever at a predetermined position during bending to selectively limit the degree of bending.

9. The apparatus as recited in claim 8 wherein said stop means is a pin.

10. The apparatus as recited in claim 1 wherein said base has formed therein two or more holes for mounting said bending apparatus.

11. The apparatus as recited in claim 1 wherein said clamping means is comprised of a block, a threaded rod adapted to move said block along said base when rotated, and means for rotating said threaded rod.

12. A bender apparatus for bending material in the edgewise plane comprising a base, a threaded radius pin projecting from said base, a clamping block slidably mounted on said base clamping said material between said radius pin and said clamping block, a forming lever rotatably mounted about said radius pin having means for engaging said clamped material, a plane guiding plate coaxially placed about said radius pin, a resilient means concentric to said plane guiding plate about said radius pin and a clamping nut threaded on said radius pin, said nut, when threaded on said radius pin, applying compressive force on said material through said resilient means and said plane guiding plate holding said material in the edgewise plane throughout the bending operation and preventing deflection of said material out of said plane.