Internal-combustion engines – Poppet valve operating mechanism – Rocker
Patent
1986-03-31
1987-07-28
Lazarus, Ira S.
Internal-combustion engines
Poppet valve operating mechanism
Rocker
123 9043, 123 9027, 123 9039, 123 905, F01L 118
Patent
active
046825754
ABSTRACT:
A rocker arm construction suitable for high-speed operation with low-friction consisting of a one-piece essentially U-shaped rocker arm having a bottom portion continuous in material from end to end with an upraised cylindrical surface portion constituting a fulcrum engaged with a stationary lash adjuster mounted in a housing secured to the rocker arm cover, the housing also including a rib portion straddling a roller cam follower rotatably mounted on one end of the rocker arm, the rib portion having a recess, the surface of which defines an epicyclic curve generated by a point on the roller cam follower as it rolls about a cam lobe on the chamshaft, the latter curve providing a pure rolling motion of the cam follower on the cam lobe and assuring a pure rolling motion of the rocker arm on the fulcrum line contact with the lash adjuster, the opposite end of the rocker arm engaging the end of a valve stem for reciprocation thereof.
REFERENCES:
patent: 1710291 (1929-04-01), Brush
patent: 2014659 (1935-09-01), Moorhouse
patent: 2089203 (1937-08-01), Griswold
patent: 2871839 (1959-02-01), Mekkes
patent: 3045657 (1962-07-01), Sampietro
patent: 3463131 (1969-08-01), Dolby
patent: 4491099 (1985-01-01), Bonvallet
patent: 4543920 (1985-10-01), Bonvallet
Ford Motor Company
Lazarus Ira S.
McCollum Robert E.
Sadler Clifford L.
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