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:
Feb. 19, 2013
Filed:
Dec. 31, 2011
Charles Earl Bates, Birmingham, AL (US);
Charles Earl Bates, Birmingham, AL (US);
Other;
Abstract
Tubular metal articles such as pipe and cylinder liners are produced by centrifugal casting on a permanent metal mold coated by refractory glass on the active surface. A coating suspension mix is evenly distributed onto the mold to form a uniform layer of insulation on the surface of the mold. The material for the coating comprises of essentially a waterborne suspension mix of glass particles. The suspension is given time to dry on the surface of the mold. The glass particles dispersed in the suspension are both non-crystalline and nonporous. The glass particles in the suspension and forming the coating are not dissolved and do not chemically attract the polar water molecule or cause it to bond to the surface of glass in the suspension or to the mold active surface. Articles cast as such are smooth surfaced and require only limited machining. The coating provides thermal protection to the mold, but more importantly, the water in the suspension vaporizes quickly on a warm mold because the water is not attracted or bonded to the refractory glass particles.