Water Hammer Arrester Corp. v. Tower

SPARKS, Circuit Judge.

By this complaint Water Hammer Arrester Corporation sought a declaratory judgment against the defendant relative to United States patent to Tower, No. 2,273,-766, issüed February 17, 1942, upon an application filed August 4, 1940. The alleged invention covered by the patent relates to a water hammer arrester, or other energy absorbing appliance of the type in which abnormal impulses or fluctuations in pressure of water or other liquid in a pipe or other conduit are suppressed by compression of a gas or other compressible fluid medium to prevent water hammer.

Plaintiff is…