Title:
CONNECTION STRUCTURE OF SAND BLAST NOZZLE AND NOZZLE CONNECTOR
Document Type and Number:
WIPO Patent Application WO/2020/116706
Kind Code:
A1
Abstract:
The present invention relates to an improved connection structure of a sand blast nozzle, by which a leakage does not occur from a connection portion between a spray hose and a nozzle in a sand blast device and connection operation is convenient. The connection structure comprises: a nozzle tube which is coupled to an end portion of a rubber hose which is the spray hose of the sand blast, provides a conveying passage of a spray material, and is provided with a spray hole at the front end thereof and a wedge member at the rear end thereof, wherein the wedge member radially protrudes to serve as a wedge by digging into the internal circumferential surface of the rubber hose; and a cover tube which is in contact with the rear end of the wedge member and inserted around the nozzle tube. An angle between a coupling direction of the rubber hose and the nozzle and an inclined surface of the front end of the wedge member forms an obtuse angle, and an angle between the coupling direction of the rubber hose and the nozzle and an inclined surface of the rear end of the wedge member forms an acute angle. In addition, when the cover tube is completely inserted around the nozzle tube, the cover tube blocks the inclined surface of the rear end of the wedge member so that the wedge member cannot function as a wedge.
Inventors:
LEE SE CHANG (KR)
Application Number:
PCT/KR2018/016068
Publication Date:
June 11, 2020
Filing Date:
December 18, 2018
Export Citation:
Assignee:
LEE SE CHANG (KR)
International Classes:
B24C5/04; B05B13/02; B05B15/658
Foreign References:
| CN201428882Y | 2010-03-24 | |||
| KR100408930B1 | 2003-12-11 | |||
| JP2004276137A | 2004-10-07 | |||
| US5036631A | 1991-08-06 | |||
| KR200365026Y1 | 2004-10-19 | |||
| JP2017219054A | 2017-12-14 |
Attorney, Agent or Firm:
CHO, Heung Kue (KR)
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