Caliper type disc brake with remarkable friction pads

Claim 2

A caliper type disk brake comprising a rotatable disk, a caliper extending arcuately over a peripheral portion of said disk and having a pressure portion positioned chordwise adjacent one side of said disk and a reaction portion positioned chordwise adjacent the opposite side of said disk, said caliper portions being joined together by a pair of arcuately spaced knuckles which extend axially of said disk outwardly of the periphery thereof, a torque bar positioned substantially midway arcuately between said knuckles and extending axially between said caliper portions outwardly of said disk periphery, said pressure portion having a pair of side-by-side piston units adapted to apply a braking force, a plurality of backing plate and pad combinations positioned between said portions and said disk with two each of said combinations being received in side-by-side relation between each of said portions and said disk, and each of said backing plates having abutment means which extend radially outwardly of the disk periphery slidably engaging one of said knuckles and said torque bar for transferring braking torque therethrough, said torque bar being removable to permit withdrawal and insertion of said backing plate combinations through the space between said knuckles.

Claim 3

In a caliper type disk brake including a rotatable disk and a caliper extending along an arcuate extent of said disk and having portions positioned on opposite sides of said disk, and a pair of piston units in at least one of said caliper portions positioned in side-by-side relationship, the improvement in friction pads and support means therefor comprising at least one pair of backing plates, each plate having a separate friction pad secured thereon, said plates and the associated pads being positioned in side-by-side relation corresponding to that of said piston units between said piston units and said disk so that one each of said pads is axially opposite of one of said piston units, said backing plates each having back portions which extend radially outwardly of the periphery of the said disk with each of said back portions being formed with abutment means on the arcuate ends thereof, and means on said caliper defining three arcuately spaced abutments positioned outwardly of the disk periphery including two spaced apart end abutments and a center abutment for receiving torque from the arcuate ends of said plates permitting each of said plates to move independently of the other under the influence of its associated said piston unit, said center abutment being removable from said caliper to facilitate insertion and withdrawal of said backing plates through the space between said end abutments.

Claim 4

In a caliper type disk brake including a rotatable disk and a caliper extending along an arcuate extent of said disk and having portions positioned on opposite sides of said disk, and a pair of piston units in at least one of said caliper portions positioned in side-by-side relationship, the improvement in friction pads and support means therefor comprising at least one pair of backing plates, each plate having a separate friction pad secured thereon, said plates and the associated pads being positioned in side-by-side relation corresponding to that of said piston units between said piston units and said disk so that one each of said pads is axially opposite of one of said piston units, said backing plates each having back portions which extend radially outwardly of the periphery of the said disk with each of said back portions being formed with abutment means on the arcuate ends thereof, and means on said caliper defining three arcuately spaced abutments positioned outwardly of the disk periphery including two spaced apart end abutments and a center abutment for receiving torque from the arcuate ends of said plates permitting each of said plates to move independently of the other under the influence of its associated said piston unit, said center abutment being removable from said caliper to facilitate insertion and withdrawal of said backing plates through the space between said end abutments.