Patent ID: 7585105

Claim:
A blending system comprising: a tub having an inner surface; an agitator having a shaft and a ribbon wound helically around said shaft, wherein said agitator is disposed within said tub such that said agitator can be rotated about said shaft without contacting said inner surface of said tub; and a scraper assembly comprising: a substantially rigid member, wherein said substantially rigid member is attached to said ribbon; a pin with a first end and a second end, wherein a tab protrudes from a side of said first end and said second end is attached to said substantially rigid member; a scraper head having at least one scraping surface, wherein said scraping surface contacts said inner surface of said tub, wherein said scraper head has a hole therethrough that is large enough to receive said pin, wherein said scraper head has a first channel that runs the depth of the scraper head and is large enough to receive said tab, and wherein said scraper head has a second channel that does not run the depth of the scraper head and is large enough to receive said tab; and a coil spring, wherein said coil spring is disposed around said pin and is held captive between said substantially rigid member and said scraper head.