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. 24, 1987
Filed:
Sep. 27, 1984
Karl-Ernst von Eckardstein, Kamen, DE;
Friedrich Wilh. Schwing GmbH, , DE;
Abstract
In a method and an apparatus for pneumatically discharging hydromechanically conveyed hydraulic building material for underground operations, in which compressed air is supplied to the wet building material, pumped in a dense stream, in front of a mouth piece serving the discharge thereof and having in particular a nozzle shape, the compressed air being gunned out together with the building material, the invention provides for the dense stream of the pumped building material to be supplied to the compressed air supplied in a stream, sealed off from the outside air by the wet building material, and thereby be distributed in the compressed air stream and conveyed with the latter to the mouth piece to be discharged therefrom.