Patent ID: 7641560

Claim:
A linkage coupling a drum foot pedal rotor to a drum beater apparatus comprising in combination a) an elongated link, b) a first joint coupling the rotor to said link, and a second joint coupling the link to said apparatus, c) at least one of said joints having first and second joint components relatively rotatable about a transverse axis, d) two transversely spaced bearings carried by the first component, each bearing including annular inner and outer races and bearing balls located between said races, there being members coupling the inner races to the second component at transversely spaced locations, whereby the inner races are offset transversely relative to the outer races to thereby clamp the balls transversely between the races, and against curved oppositely facing sidewalls defined by the races to thereby take up any clearances associated with the bearings that would contribute to beater actuator time factor elapse, e) and immobilizing means joining i) the outer races to the first component, and/or ii) the members to the second component.