Oleodynamic valve, particularly for a hydraulic tappet

Details Oleodynamic valve, particularly for a hydraulic tappet Oleodynamic valve, particularly for a hydraulic tappet

1985-10-22

1987-05-05

Lazarus, Ira S.

Internal-combustion engines

Poppet valve operating mechanism

Tappet

123 9055, F01L 124

Patent

active

046623248

ABSTRACT:
In a hydraulic tappet including two cups slidable one within the other, of which the outer one cooperates with the surface of the cam of the camshaft through an adjustment disc while the inner one bears on the end of the valve stem, an expansion chamber is defined between the facing frontal walls of the two cups and is connected to the lubrication circuit of the engine through a supply duct controlled by an oleodynamic valve. The valve is constituted by a conical seat formed in a through-hole in the frontal wall of the inner cup to connect the expansion chamber to the lower part of the cup and intercept the supply duct, and a mushroom-shaped member whose head controls the conical seat and whose stem is inserted in the through-hole which acts as a guide for it.

REFERENCES:
patent: Re21931 (1941-10-01), Voorhies et al.
patent: 1966794 (1934-07-01), George
patent: 1977778 (1934-10-01), Rice
patent: 2370761 (1945-03-01), Voorhies
patent: 2940433 (1960-06-01), Randol
patent: 3728990 (1973-04-01), Lampredi et al.
patent: 4279226 (1981-07-01), Lampredi et al.
patent: 4463713 (1984-08-01), Banale

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