Smith Engineering Works v. Nordberg Mfg. Co.

EVANS, Circuit Judge.

The two patents, the validity and infringement of which are challenged on this appeal, deal with a “gyratory’cone crusher” and a “process of crushing hard materials.” Both the machine and the process patent were issued on the same day to the same party, Edgar B. Symons. Claim 2 of the product patent and claim 8 of the process patent, both typical, are set forth in the margin. 1

- Crushers of the type described in the patent are used to crush ore, rock, etc. Their construction calls for a gyratory cone and another element consisting of a concave bowl within which the' cone…