Air Products and Chemicals, Inc.

Other

Arthur H Anderson

Richard D Ritter

Andrew P Ondush

Thomas E Murray

Andrew Paul Ondush

Richard Donald Ritter

A method and apparatus for fine grinding materials normally difficult to grind at ambient temperature, e.g. plastic and elastomeric materials in a fluid classification type impact mill utilizing liquid cryogen to pre-cool the material to be ground, to cool the material and the mill during grinding and to recycle vaporized cryogen from the mill back into the mill as the medium for conveying material to be ground into the mill.

Method for fine grinding

Apparatus for fine grinding

An auxiliary heating element acts on a steam trap connected to the return outlet of a radiator. A check valve placed between the trap and the radiator prevents dissipation of the steam generated by the auxiliary heating element into the radiator. A thermostat provides automatic control over the operation of the heating element and the radiator.

Automatic thermostatic control for a steam trap radiator

Growing community of inventors

Allentown, PA, United States of America

Arthur H Anderson