High pressure fluid apparatus for blast cleaning

A high pressure fluid blast apparatus for selectively initiating and relieving high pressure fluid flow from the discharge end of a high pressure fluid supply conduit;

• said apparatus comprising:
• a valve body connected to the high pressure fluid supply conduit and having a central bore defining a valve chamber therein to receive high pressure fluid from said fluid supply conduit;
• said central bore having opposed upper and lower open ends;
• a high pressure fluid discharge conduit connected to said valve body in fluid communication with said valve chamber to receive high pressure fluid from said supply conduit for discharge;
• a dump passage from said valve chamber to atmosphere positioned below said fluid discharge conduit;
• a cartridge mounted within said valve chamber including an outer fixed sleeve and a valve member mounted within said sleeve for movement between one position blocking fluid flow from said supply conduit to said dump passage and a second position permitting fluid flow from said supply conduit to said dump passage;
• an end plug mounted in said upper open end of said central bore to retain said cartridge in position within said valve chamber;
• said plug having a blind central bore and a plurality of lateral ports extending from said central bore through the wall of said plug and in fluid communication with said supply conduit when said valve member is in said second position;
• said bore having an enlarged diameter bore portion about said plug to define an annular fluid chamber about said plug in communication with said lateral ports, said cartridge being removable from said valve chamber upon removal of said end plug from said upper open end of said bore;
• and
• said dump passage being in fluid communication with said lateral ports and said annular fluid chamber about said plug when said valve member is in said second position to permit fluid flow from said supply conduit to said dump passage.

A high pressure fluid blast apparatus for selectively initiating and relieving high pressure fluid flow from the discharge end of a high pressure fluid supply conduit;

• said high pressure fluid apparatus comprising:
• a valve assembly including a body having a valve mounting face;
• a handle assembly having a handle mounting face in opposed relation to said valve mounting face;
• fasteners securing said mounting faces in mating face to face contact with each other;
• said body having a central bore defining a valve chamber and opposed inlet and outlet ports communicating with said valve chamber, said high pressure fluid supply conduit being connected to said inlet port;
• a high pressure fluid discharge conduit connected to said outlet port for receiving high pressure fluid from said high pressure fluid supply conduit for discharge;
• a dump passage from said valve chamber to atmosphere;
• and
• a valve member mounted within said chamber for movement between one position blocking fluid flow from said supply conduit to said fluid dump passage and a second position permitting fluid flow from said supply conduit to said dump passage;
• said handle assembly including a trigger and a guard about said trigger for enclosing said trigger, said dump passage extending through said mounting faces and an adjacent portion of said guard to receive fluid from said valve chamber when said valve member is in said second position permitting a low pressure fluid flow from said supply conduit to said dump passage for flow to atmosphere.

A high pressure fluid blast apparatus for selectively initiating and relieving high pressure fluid flow from the discharge end of a high pressure fluid supply conduit;

• said high pressure fluid apparatus comprising:
• an outer body having a cylindrical opening therein;
• an inner cylindrical valve body received within said cylindrical opening and having an annular fluid passage extending about said valve body;
• a high pressure fluid discharge conduit connected to one end of said cylindrical valve body and said high pressure fluid supply conduit connected to the other end of said cylindrical valve body;
• a central bore extending transversely through said valve body to define a valve chamber in continuous communication with said conduits;
• a dump passage in fluid communication with said annular fluid passage for communicating said valve chamber to atmosphere;
• a valve member mounted within said valve chamber for movement between one position blocking fluid flow from said supply conduit to said dump passage and a second position permitting fluid flow from said supply conduit to said annular fluid passage about said valve body and thence to said dump passage;
• a handle assembly including a trigger and a guard extending from a mounting plate about said trigger for enclosing said trigger, said dump passage receiving high pressure fluid from said high pressure supply conduit and said annular fluid passage when said valve member is in said second position permitting a low pressure fluid flow from said supply conduit to said dump passage for flow to atmosphere.

A high pressure fluid blast apparatus for selectively initiating and relieving high pressure fluid flow from the discharge end of a high pressure fluid supply conduit;

• said high pressure fluid apparatus comprising:
• an outer body having a cylindrical opening therein;
• an inner cylindrical valve body received within said cylindrical opening and having an annular fluid passage extending about said valve body;
• a high pressure fluid discharge conduit connected to one end of said cylindrical valve body and said high pressure fluid supply conduit connected to the other end of said cylindrical valve body;
• a central bore extending transversely through said valve body to define a valve chamber in continuous communication with said conduits;
• a dump passage from said valve chamber to atmosphere;
• a valve member mounted within said valve chamber for movement between one position blocking fluid flow from said supply conduit to said dump passage and a second position permitting fluid flow from said supply conduit to said dump passage;
• a handle assembly including a trigger and a guard extending from a mounting plate about said trigger for enclosing said trigger, said dump passage extending through a portion of said guard to atmosphere and receiving high pressure fluid from said high pressure supply conduit when said valve member is in said second position permitting a low pressure fluid flow from said supply conduit to said dump passage for flow to atmosphere.