Abrasive head

Claim 2

An abrasive head mountable on a rotatable spindle: a first plate and a second plate spaced apart and parallel having a centrally located hole extending therethrough to receive a spindle rotatable on an axis of rotation; a plurality of outwardly extending brushes spaced from each other around said axis and positioned between said first plate and second plate; brush holders securing said brushes between said first plate and second plate, said holders having parallel but offset side mounting flanges with said flanges of each holder overlapping and secured to flanges of adjacent holders and to said first plate, said holders also each having a rear flange secured to said first plate; a plurality of abrasive strips mounted within said head and including free distal ends extending outwardly therefrom between adjacent brushes; first means mounted to said first plate and second plate holding said strips therebetween; and, a plurality of clips, each extending between and secured to one of said side mounting flanges and a rear flange of said holders distributing force therebetween as said head is rotated exerting centrifugal force on said holders.

Claim 3

The abrasive head of claim 1 wherein said brush holders each have a main body with a back wall and a pair of side walls extending in a converging direction from said back wall forming a U-shaped cross section holding a brush therein.

Claim 4

The abrasive head of claim 1 wherein said clips each have a first ear and second ear integrally joined together and extending in a parallel direction but in offset planes, each ear having a fastener hole extending therethrough.

Claim 5

An abrasive head mountable on a rotatable spindle comprising: a pair of spaced-apart and parallel plates having centrally located mounting means operable to mount said plates on said spindle to rotate therewith on an axis of rotation; a plurality of outwardly extending brushes spaced from each other around said axis and mounted to at least one of said plates; a plurality of abrasive strips rolled upon each other within said head and including free distal ends extending outwardly therefrom each between separate adjacent brushes; holding means mounted to said plates inwardly of said brushes and being adjustably engaged with said strips and operable to hold said strips; a plurality of brush holders mountingly engaging and removably holding said brushes to at least one of said plates, said brush holders each having a main body with a back wall and a pair of side walls extending in a converging direction from said back wall forming a U-shaped cross section holding a brush therein, said back wall and side walls extending parallel to aid axis and each having at least one end secured to one of said plates, said side walls at said one end have mounting flanges extending outwardly therefrom with said flanges of each holder longitudinally offset in the direction of said axis and with flanges of each holder overlapping and secured to mounting flanges of adjacent holders, said back wall has a mounting flange extending toward said axis and secured to one of said plates; and, a plurality of clips, each extending between and secured to one of said mounting flanges of said side walls and a mounting flange of said back wall distributing force therebetween as said head is rotated exerting centrifugal force on said holders.

Claim 6

An abrasive head mountable on a rotatable spindle comprising: a pair of spaced-apart and parallel plates having centrally located mounting means operable to mount said plates on said spindle to rotate therewith on an axis of rotation; a plurality of outwardly extending brushes spaced from each other around said axis and mounted to at least one of said plates; a plurality of abrasive strips rolled upon each other within said head and including free distal ends extending outwardly therefrom each between separate adjacent brushes; holding means mounted to said plates inwardly of said brushes and being adjustably engaged with said strips and operable to hold said strips; a plurality of brush holders mountingly engaging and removably holding said brushes to at least one of said plates, said brush holders each having a main body with a back wall and a pair of side walls extending in a converging direction from said back wall forming a U-shaped cross section holding a brush therein, said back wall and side walls extending parallel to aid axis and each having at least one end secured to one of said plates, said side walls at said one end have mounting flanges extending outwardly therefrom with said flanges of each holder longitudinally offset in the direction of said axis and with flanges of each holder overlapping and secured to mounting flanges of adjacent holders, said back wall has a mounting flange extending toward said axis and secured to one of said plates; and, a plurality of clips, each extending between and secured to one of said mounting flanges of said side walls and a mounting flange of said back wall distributing force therebetween as said head is rotated exerting centrifugal force on said holders.

Claim 7

The abrasive head of claim 4 wherein said clips each have a first ear and a second ear integrally joined together and extending in a parallel direction but in offset planes, each ear having a fastener hole extending therethrough.

Claim 8

The abrasive head of claim 4 and further comprising a plurality of fasteners extending through one of said plates and through said mounting flanges of said side walls which are overlapped fixedly holding said holders at said one end of said holders.

Claim 9

The abrasive head of claim 6 wherein said mounting flanges of said side walls of said holders extend in a direction toward adjacent holders with each of said mounting flanges of said side walls including a hole which has a continuous surrounding periphery limiting movement of said fasteners relative to said mounting flanges.

Claim 10

The abrasive head of claim 4 wherein said plates have aligned and mutually facing circumferential edge portions extending in the direction of said axis adjacent said brush holders limiting outward movement of said holders as said head is rotated.

Claim 11

The abrasive head of claim 4 wherein said mounting means includes a pair of cylindrical hubs and a pair of hub-lock plates, said hubs each have a stop surface contactable against said hub-lock plates limiting relative motion therebetween, said hubs having means through which said spindle is extendable.

Claim 12

The abrasive head of claim 9 wherein said hub-lock plates are located outwardly of and adjacent to said pair of plates and are fixedly secured thereto preventing relative motion therebetween.

Claim 13

The abrasive head of claim 10 wherein one of said hub-lock plates is welded to one of said pair of plates and said holding means.