Boat-type rocker arm assembly

Claim 1

A boat-type rocker arm assembly comprising a pedestal having a fulcrum and a shank of generally rectangular shape in transverse cross section, said fulcrum extending outwardly beyond two opposite sides of said shank, said fulcrum having curved lower surfaces of a predetermined radius, an elongate boat-type rocker arm having a curved intermediate interior surface extending thereacross between its ends, said interior surface having a radius greater than the radius of said fulcrum, said interior surface being straight as viewed in cross section taken perpendicular to the longitudinal extent of said rocker arm, whereby said lower surfaces of said fulcrum engage said interior surface on substantially line contact extending perpendicular to the longitudinal extent of said rocker arm, said rocker arm having a rectangular opening centrally located in the intermediate surface through which said shank of said pedestal extends, said rectangular opening having transverse edges extending across said rocker arm and tapering downwardly and inwardly, said pedestal having opposite curved areas, as viewed in longitudinal section through said shank, on the other two opposite sides of said shank at the portions thereof which extend through said rectangular opening, the dimension between said opposite curved areas being slightly less than the corresponding dimension across said opening between said transverse edges, whereby the cooperation of said rectangular opening and said pedestal substantially prevents longitudinal movement of said rocker arm relative to said pedestal.