Blast Gun

Author:  Pletcher, C. B.
Source:  US Patent 2,751,716
Doc ID:  1956000
Year of Publication:  1956
Abstract:  
This invention relates to improvements in sand blasting guns of the type using a high pressure of water for scouring or cleaning work or surfaces, the water being mixed with air or sand and detergents and particularly relates to improvements over my prior Patent No. 2,107,084. In such patent, a blasting gun of the type above mentioned is disclosed, wherein a jet nozzle is interposed in a passage between the valve chamber and the mixing chamber and the nozzle has a diagonal port, which communicates with the bore of the nozzle and the mixing chamber so that certain of the water passing in a stream through the bore is lead through the port and into the mixing chamber in a manner to set up a turbulence in the chamber. The primary object of the instant invention is to provide an improved blasting gun, which takes in more air and sand and cleans in a better and more efficient manner and which avoids the aforementioned defects of my prior patent.