Oilgear Co. v. J. N. Lapointe Co.

MANTON, Circuit Judge.

Plaintiff sued on claims 3, 11, and 12 of the Ferris patent, No. 1,468,595, issued September 18, 1923, for a broaching machine. The defendant answered and filed a counterclaim for infringement of claims 6 and 7 of its Lapointe patent, No. 1,109,847, granted September 8,1914, for its broaching machine.

A broach is a variety of a machine cutting tool. It consists of a rod sometimes having one tooth, but usually a succession of teeth of progressively increasing size, to be pushed or pulled through a -hole for enlarging, reshaping, or refinishing the hole, or, where external…