Brake shoe assembly, apparatus and method for making same

Details Brake shoe assembly, apparatus and method for making same Brake shoe assembly, apparatus and method for making same

Filed on

1978-12-18

Date issued

1980-12-30

Examiner

Larson, Lowell A.

Patent Class

Metal deforming

SubClass

By relatively movable tools having slidably-engaged...

Other Related Categories

72427, B21D 4500

Type

Patent

Status

active

Patent number

042416000

Description

ABSTRACT:
A brake shoe assembly and an apparatus and method for making same wherein the brake shoe includes a pair of spaced parallel arcuate ribs having outside radii secured to the underside of an arcuate plate with the inside radii of the arcuate ribs having a greater thickness than the outside radii. In accordance with the apparatus and method for making the brake shoe assembly, a straight length of rectangular bar stock having opposite faces is bent into an arcuate shaped member while maintaining the bar stock substantially flat with the opposite faces extending transversely to the axis of bending at a bending station. Subsequently, a plurality of holes are pierced between the opposite faces of the arcuate member at a piercing station. Thereafter, the outside periphery of the opposite faces of the arcuate member are trimmed at a trimming station to a predetermined arcuate rib configuration including a predetermined outside radius with a semicircular portion at one end of the arcuate rib concentric with a hole therein and a notch disposed in the other end of the arcuate rib. Finally, the concentric hole at one end of the arcuate rib and the notch at the other end define working surfaces which are finished to a predetermined machined finish at a finishing station.

REFERENCES:
patent: 1362708 (1920-12-01), Lang
patent: 1470399 (1923-10-01), Smith
patent: 1921210 (1933-08-01), Ziska

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