Claims
- 1. A sandblast nozzle shutoff valve comprising a housing having an outlet nozzle fitting and an inlet supply opening communicating with said nozzle fitting, a nozzle gasket positioned adjacent an area of reduced diameter within said nozzle fitting, a control armature pivotally secured within said housing between said outlet nozzle and said inlet, a valve flapper extending from said control armature, a half arcuate valve seal recessed within a ball stop holder on one side of said valve flapper and aligned for engagement with said nozzle gasket, a power cup having an annular right angularly disposed flange extending around its perimeter portion on the other side of said valve flapper opposite said ball stop holder and in an upstream direction toward said inlet supply opening, said flange being of a diameter greater than that of said ball stop holder and said half arcuate valve seal, a handle secured to said control armature.
- 2. The sandblast nozzle shutoff valve of claim 1 wherein said control armature has a spring resistance secured thereto.
- 3. The sandblast nozzle shutoff valve of claim 1 wherein said means for aligning and securing said valve seal and said flapper comprises a ball stop holder removable secured to said flapper by fasteners.
- 4. The sandblast nozzle shutoff valve of claim 1 wherein said ball stop holder has an annular lip defining a recess in which said half arcuate valve seal is positioned downstream of said power cup on said valve flapper.
- 5. The sandblast nozzle shutoff valve of claim 1 wherein said annular flange has an inner diameter greater than the outer diameter of said seal element.
Parent Case Info
This is a continuation-in-part of patent application Ser. No. 06/761,759, now abandoned.
US Referenced Citations (2)