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:
Nov. 08, 2011
Filed:
Jan. 23, 2009
Applicant:
Raymond E. Lackey, Redmond, OR (US);
Inventor:
Raymond E. Lackey, Redmond, OR (US);
Assignee:
M.S.T. Corporation, Prineville, OR (US);
Primary Examiner:
Int. Cl.
CPC ...
G05D 23/02 (2006.01); F16K 5/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A tapered rotary feed valve is manufactured or refurbished for use in feeding materials into a high temperature environment, so as to reduce the time and expense of break-in operation, by shaping the tapered bore of the valve body at ambient temperature to have greater clearance around the rotor in a sector of the valve body that is cooler when the valve is at stable operating temperature. As a result, when the valve first reaches operating temperature after being manufactured or refurbished the rotor and the bore of the valve body nearly fit and can quickly wear in to fit each other closely.