Michael Alton Click

US Patent:

49021737, Feb 20, 1990

Filed:

May 20, 1988

Appl. No.:

7/197026

Inventors:

Alfred W. Hendee - Houston TX
Michael A. Click - Houston TX
Ralph E. Gerstung - Houston TX

Assignee:

Hendee Enterprises, Inc. - Houston TX

International Classification:

B65G 5324

US Classification:

406145

Abstract:

A system for preventing contamination of particulate material in a railroad hopper car during transportation and unloading of the material from the car, comprising transporting the material in the railroad hopper car with a filter on each of the various inlet and outlet openings of the car, then upon reaching the point for unloading, applying a vacuum to draw the material out of the car through one spout with its filter removed, while leaving the filters in place on the other openings in the car to prevent contamination of the product from external sources during transportation and unloading. The preferred filter for the railroad car spouts has a frame, a conical filter bag, and a filter bag support ring for mounting on a spout on the car.