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:
Jun. 02, 1998
Filed:
Oct. 04, 1996
Elaine Cecilia Beckwith, Northville, MI (US);
Warren Benjamin Copple, Trenton, MI (US);
James Stewart Rankin, II, Novi, MI (US);
Scott Raymond Zimdars, Canton, MI (US);
Ford Global Technologies, Inc., Dearborn, MI (US);
Abstract
A closed core box is provided with one or more inlets for receiving and passing gas fluidized resin-coated sand to fill the interior of such core box, and with one or more screened outlets for allowing egress of such gas. A closed cylindrical or angular sand-fluidizing chamber is provided for each of the inlets, the chamber having one end connectable to a pressurized gas supply and an opposite end communicating with an inlet. At least part of each chamber is filled with resin-coated sand and a non-porous piston is placed on the sand within each chamber, each piston providing an annular gap (i.e. about 1/16 of an inch) with the interior of such chamber to direct the gas supply along the periphery of the chamber interior. The pressurized gas supply (40-80 psi) is connected to the chamber above the pistons whereby gas will move past each of the pistons to fluidize the sand therebelow in the chamber in a manner that continuously and toroidally recirculates the sand away from the periphery of the chamber while communicating with an inlet to the core box to promote smooth fluidized flow through such inlet, the piston moving down with the top level of the sand in the chamber as sand moves through the inlets.