F - Mech Eng,Light,Heat,Weapons – 01 – L
Patent
F - Mech Eng,Light,Heat,Weapons
01
L
123/197
F01L 1/18 (2006.01) F01L 13/00 (2006.01)
Patent
CA 2037870
A cold-formed rocker arm 10 of the cam-follower type is specifically designed for variable-lift engines. The rocker arm 10 comprises a one-piece metal body 32 preferably of generally inverted U-shaped cross section throughout most of its length. The body 32 has a top wall 34 and two side walls 36, 38 extending downwardly therefrom and carrying an axle 58 an which a cam-contacting roller 24 is rotatably mounted and exposed through a central opening 52 in the top wall 34 above the roller 24 to be engaged by a tapered cam 26 of a cam shaft. The rocker arm 10 has a substantially semi-spherical recess 40 at one end 12 to receive an end of a lifter post 14 on which the rocker arm 10 can pivot. The other end 18 of the body 32 has an open-ended channel 44 extending longitudinally of the body 32 to receive a rounded upper end 20 of a valve stem 22. A lubrication port 50 in the top wall 34 of the rocker arm 10 communicates with an inner end 48 and with a clearance 49 in a central portion of the channel 44. The clearance 49 provides a lubrication path for the flow of oil along the channel 44. Sliding contact is obtained between the valve stem 22 and the channel 44 during operation yet the rocker arm 10 resists transverse forces caused by the tapered cam 26 of the variable-lift cam shaft.
Henley Manufacturing Holding Company Inc.
Macrae & Co.
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