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:
Jul. 31, 1990
Filed:
Jan. 30, 1989
Robert H Johns, Natrona Heights, PA (US);
J Richard Rzomp, Brackenridge, PA (US);
Allegheny Ludlum Corporation, Pittsburgh, PA (US);
Abstract
A leveling apparatus for leveling a surface of refractory bed comprised of refractory pebbles. The leveling apparatus is comprised of a disk having a level bottom surface suitable for positioning upon the surface of the refractory bed. A plurality of spaced apart, downwardly extending tooth members project beneath the level, bottom surface of the disk, and into the refractory bed. Rotation of the disk causes the plurality of tooth members to displace the refractory pebbles in a rake-like manner to thereby level the surface of the refractory bed by causing the refractory pebbles to conform to the level bottom surface of the disk.