Spray nozzle
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United States of America Patent
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Apr 9, 1991
Grant Date -
N/A
app pub date -
Jun 5, 1990
filing date -
Jun 29, 1989
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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