Abstract: A rocker arm assembly having a main body with side walls and a push rod contacting portion spaced away from a valve stem contacting portion is disclosed. The valve stem contacting portion further includes a spring clip mounted thereon. The arms of the spring clip cooperate to form a channel for providing lateral guidance between the rocker arm and a valve stem.

Abstract: The present invention is directed to a rocker arm having a pivoting clevis mounted to a second end of the rocker arm that engages a valve stem or a bridge that activates dual valves. The clevis has a substantially flat contacting surface and an internal recess created by two upwardly extending walls and an upwardly facing cam surface or receiving the second end of the rocker arm. The clevis is attached to the second end of the rocker arm by an attachment pin that extends through the upwardly extending walls of the clevis and through the second end of the rocker arm. The second end of the rocker arm has a downwardly extending portion that mates with the upwardly facing cam surface of the clevis to allow the clevis to pivot about the attachment pin.

Abstract: A rocker arm assembly having a main body with side walls and a push rod contacting portion spaced away from a valve stem contacting portion is disclosed. The valve stem contacting portion further includes a spring clip mounted thereon. The arms of the spring clip cooperate to form a channel for providing lateral guidance between the rocker arm and a valve stem.

Abstract: A rocker arm assembly for an internal combustion engine includes a central mounting shaft and a rocker arm rotatably mounted to the central shaft wherein the rocker arm has a generally planar main body with a valve contacting end and a push rod contacting end. A convex surface is formed on a lower edge of a valve contacting surface and the push rod contacting end includes a generally semi-spherical recess that creates generally semi-spherical outer projections on the sides of the rocker arm main body. The central mounting shaft according to one embodiment of the present invention is a generally hollow, tubular shaft having spaced apart lubrication apertures for providing lubricant to each rocker arm. A second embodiment of the present invention has a central mounting shaft that includes a plurality of relatively short, hardened shafts connected together at respective adjoining ends by a spacer sleeve to provide a rocker arm assembly having greater stiffness.

Abstract: A compact roller follower has a one-piece, cold-formed elongate metal body. The body has an intermediate portion, a first end portion, and a second end portion. The intermediate portion has two substantially parallel side walls and a large, elongate upper opening. The first end portion has a top wall and two side walls extending downwardly therefrom and spaced closer together than the parallel side walls of the intermediate portion. The first end portion forms a generally inverted U-shaped recess to receive an end of a valve stem. The second end portion has a second top wall and side walls extending downwardly therefrom. The end of the second top wall has a tongue which is doubled back underneath the second top wall. An upper surface of the tongue is in contiguous relationship with a lower surface of the second top wall and forms a recess to receive an upper end of a lifter post above a lifter post body.

Abstract: A one-piece, cold-formed rocker arm is of the boat-type. It includes a one-piece metal body which is cold formed from a metal blank and is of generally U-shaped cross-sectional configuration throughout most of its length. The rocker arm body has two generally parallel side walls and a connecting bottom wall therebetween. The body also has inwardly-extending side walls extending from the parallel ones toward both ends of the body. The bottom wall extends between the side walls and has an opening for receiving a pivotal support, a recess for receiving a push rod at one end, and a pad for engaging an end of a valve stem at the other end. An elongate stiffening member extends between upper edges of side walls and specifically between the inwardly-extending side walls extending toward the push rod end of the body. The stiffening member preferably is a rod received in notches in the upper ends of the edges of the side walls and affixed thereto by resistance welding.

Abstract: A cold-formed rocker arm with unique lubrication provisions is disclosed. The rocker arm includes a one-piece metal body of generally inverted U-shaped cross section having a top wall and two side walls. One end of the body has a recess to engage an end of a push rod and the other end has a large, upwardly-facing recess to retain oil so as to provide lubrication substantially immediately when the engine is started. The bottom surface of the reservoir forms a pad to engage an end of a valve stem. A mounting bolt of the rocker arm has a splash ring on the head thereof to disperse oil when intercepting a stream thereof.

Abstract: A rocker arm for an internal combustion engine is disclosed. The rocker arm has a cold-formed, one-piece metal body with a narrow width and a substantial depth. The body has a pad at one end for engaging an end of a valve stem and has a socket at the other end for engaging the upper end of a push rod. An intermediate portion of the body has a large opening of generally trapezoidal configuration with a lower edge longer than an upper edge. A middle portion of the lower edge has a structurally-integral, outwardly-flared portion defining an upwardly-facing socket for engaging a pivot ball about which the rocker arm can pivot during operation.