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:
Apr. 24, 2001
Filed:
Nov. 15, 1999
Richard G. Hall, Hiram, OH (US);
North American Refractories Co., Cleveland, OH (US);
Abstract
A knockout device for removing a taphole sleeve from a furnace wall. The device is comprised of a pneumatic hammer having an elongated body and a weight reciprocally movable by air pressure along the body. The body has a first end with an air inlet for receiving air under pressure from an external source and a second end. A metal block is attached to the second end of the body. The block has a planar surface dimensioned to rest upon an upper end of a taphole sleeve. A locating pin extends from the block. The pin is dimensioned to be received within an axial bore defined by the taphole sleeve. A housing surrounds the hammer and defines a cavity therearound. The housing has openings therethrough to allow air from the hammer to vent from the cavity.