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. 09, 1991
Filed:
Jun. 05, 1990
Applicant:
Inventor:
Eike Herfurth, Allensbach, DE;
Assignee:
Elkem a/s, , NO;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
B28C / ; B28C / ; E04F / ;
U.S. Cl.
CPC ...
239417 ; 2394273 ;
Abstract
A spray nozzle for dry shotcreting is disclosed. The spray nozzle has a first member through which dry concrete mix is passed, a second member attached to the first member through which water is passed, and a spray nozzle head. The spray nozzle head has a plurality of openings for water inlet from the second member into the dry concrete mix which passes into the spray nozzle head from the first member. The openings are arranged either circularly or helically about the circumference of the spray nozzle head. The number of openings available for water inlet can be adjusted by axial movement of the spray nozzle head.