Patent ID: 7219385

Claim:
A top brush assembly for a car wash machine, said top brush assembly supported at either of a pair of ends over a car wash tunnel by a pair of swing arms on either side of said wash tunnel and rotated by a drive shaft on which a top brush is mounted, said top brush comprising: a stepped diameter core and sets of radially projecting stiff wash fingers secured to said core, said core having smaller diameter end sections and a larger diameter center section, a series of said sets of radially projecting wash fingers secured to each of said core sections and distributed along the length of each core section; said larger diameter center section of said core comprising most of the overall length of said top brush; said wash fingers comprising flat pieces of closed cell foam with the wash fingers of each set lying flat in a common radial plane, said wash fingers in said sets attached to said core end sections longer than said wash fingers in said sets attached to said core center section to create a substantially uniform outside diameter of said top brush; and said end sections and center section of said core including aligned spacer discs of closed cell foam interposed between said sets of fingers, each finger in each set comprising a separate piece from the other fingers in said set.