Joseph A Mraz

US Patent:

41114922, Sep 5, 1978

Filed:

Jan 25, 1977

Appl. No.:

5/762304

Inventors:

Joseph Mraz - Plant City FL

International Classification:

B65G 5336

US Classification:

302 39

Abstract:

A pneumatic conveying system for a granular, powdery, or liquid product which utilizes during normal operation pressure differentials to convey and to regulate the flow of product through the system. A high velocity stream of air creates a pressure differential between a main pipeline and a product chute elbow to thereby suck the product into the stream of air. The system includes a pair of tank chambers so that the product may be fed alternatively from the two tank chambers into the product chute elbow. The tank chambers may be of sufficiently small size so that switching from tank to tank occurs less than two minutes apart preferably in the range of from about one minute to one second. Each tank chamber includes outlet and inlet openings which are pressure operated. The switching is controlled by introduction of air into one tank at a time which simultaneously closes the product inlet opening into the tank and opens the outlet opening.

US Patent:

40099121, Mar 1, 1977

Filed:

Feb 3, 1976

Appl. No.:

5/654796

Inventors:

Joseph Mraz - Plant City FL

International Classification:

B65G 5314

US Classification:

302 25

Abstract:

A pneumatic conveying system for a pulverant, powdery, or liquid product utilizes a high velocity stream of air to create, during normal operation, a zone of negative pressure within a transition chamber into which the product is fed from an inclined chute. The negative pressure condition in the transition chamber tends to suck the product into the air stream. A check valve door on the chute is opened by reason of the negative pressure to allow product feed and is automatically closed to prevent further product feed and blowback resulting from back pressure when the system is blocked. The product may be fed alternately from a pair of tanks of sufficiently small size so that switching from tank to tank occurs less than two minutes apart. The switching is controlled by introduction of low pressure air into one tank at a time which simultaneously closes the product inlet opening into the tank and opens the outlet opening.