Abrasive throwing wheel and improved blade assembly

The combination of an abrasive throwing wheel with a plurality of circumferentially spaced blade blocks on said wheel;

• a plurality of radially extending blades, each blade secured to said wheel by one of said blade blocks, each of said blades having a front surface, a rear surface, an inner end and an outer end;
• wherein said blade has a first opening on said rear surface proximate said inner end and a second opening on said rear surface spaced from said first opening and proximate said outer end, said openings being cavities opposing each other and formed in protrusions on the rear of said blade;
• wherein said blade block has rigid lug means for engagement in said first opening on the rear of said blade, and said blade block also has abutment means that functions as a bearing surface for contacting the rear of said blade and thereby rendering support to said blade when said blade is in motion on said wheel, and an opening intermediate said lug means and said abutment means;
• and
• deformable, resilient locking means for insertion in said second opening in the rear of said blade and for insertion in said opening in said blade block to thereby lock said blade in position on said blade block and restrict disengagement of said lug from said first opening.

A rotatable centrifugal abrasive throwing device comprising a driven wheel;

• a plurality of circumferentially spaced blade blocks on said wheel;
• a plurality of radially extending blades, each of said blades secured to said wheel by one of said blade blocks, each of said blades having a front surface, a rear surface, an inner end and an outer end;
• a central opening in said driven wheel;
• a hollow, vaned, driven impeller mounted in said central opening rotatable with said wheel;
• a stationary control cage around said impeller, said control cage having an opening therein for the passage of abrasive material from said impeller onto said blades;
• and means for feeding particulate, abrasive material to said impeller;
• wherein each of said blades has a first opening on said rear surface proximate said inner end and a second opening on said rear surface spaced from said first opening and proximate said outer end, said openings being cavities opposing each other and formed in protrusions on the rear of said blades;
• wherein each of said blade blocks has rigid lug means for engagement in said first opening on the rear of a blade, and each of said blade blocks also has abutment means that functions as a bearing surface for contacting the rear of a blade and thereby rendering support to said blade when said blade is in motion on said wheel, and an opening intermediate said lug means and said abutment means;
• and
• deformable, resilient locking means for insertion in said second opening in the rear of a blade and for insertion in said opening in the corresponding blade block to thereby lock said blade in position on said blade block and restrict disengagement of said lug from said first opening.

The combination of a blade block for mounting on an abrasive throwing wheel with a blade for mounting on said blade block, said blade having a front surface, a rear surface, an inner end and an outer end;

• wherein said blade has a first opening on said rear surface proximate said inner end and a second opening on said rear surface spaced from said first opening and proximate said outer end, said openings being cavities opposing each other and formed in protrusions on the rear of said blade;
• wherein said blade block has rigid lug means for engagement in said first opening on the rear of said blade, and said blade block also has abutment means that functions as a bearing surface for contacting the rear of said blade and thereby rendering support to said blade when said blade is in motion on said wheel, and an opening intermediate said lug means and said abutment means;
• and
• deformable, resilient locking means for insertion in said second opening in the rear of said blade and for insertion in said opening in said blade block to thereby lock said blade in position on said blade block and restrict disengagement of said lug from said first opening;
• whereby said blade is removable from said blade block by moving said blade longitudinally to compress said resilient locking means sufficiently for said rigid lug means to disengage said first opening.