The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 1998
Filed:
Jun. 28, 1996
Applicant:
Inventors:
Richard E Newbolt, Sabetha, KS (US);
Ross McEllhiney, Parkville, MO (US);
Assignee:
Mac Equipment, Inc., Sabetha, KS (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B65G / ;
U.S. Cl.
CPC ...
406 14 ; 406 63 ; 406 65 ;
Abstract
A continuous dense phase conveying system and method regulates and modulates the volume of gas flowing at a low velocity within a material conveying pipe. In response to air volume leakage through a rotary airlock valve, a controller adjusts a flow control valve to maintain the volume of air for conveying at a selected level. The flow control valve has a venturi-shaped output section. The flow control valve is more than 90% efficient (e.g., less than 10% pressure drop across the valve) and has an output that varies linearly, over a wide range, with adjustment of the valve.