Cam actuated valve assembly with hydraulic spring

Details Cam actuated valve assembly with hydraulic spring Cam actuated valve assembly with hydraulic spring

1991-06-13

1993-04-20

Walton, George L.

Valves and valve actuation

Fluid actuated or retarded

Dashpot or fluid controlled retarder or timer

123 9012, 123 9066, 251263, 251337, F01L 104, F16F 500, F16K 3152

Patent

active

052035352

ABSTRACT:
Valve assembly includes a stem having a first section toward the cam and a second section toward the valve face, the first section having a larger diameter than the second section. A housing defines a closed chamber having a first bore which closely receives said first section and a coaxial second bore which closely receives the second section. As the cam rotates to lift the valve face from the valve seat, the first section acts as a piston which increases pressure of hydraulic fluid in the chamber to provide a spring force to return the valve.

REFERENCES:
patent: 1331826 (1920-02-01), Shepherd
patent: 1427111 (1922-08-01), Knudsen
patent: 1498226 (1924-06-01), Beck
patent: 1596276 (1926-08-01), Lane
patent: 1965517 (1934-07-01), Vitalini
patent: 2936002 (1960-05-01), Opletal et al.
patent: 3102711 (1963-09-01), Filliung
patent: 3120221 (1964-02-01), Lyons
patent: 3722483 (1973-03-01), Overby
patent: 4312494 (1982-01-01), Aoyama
patent: 4592313 (1986-06-01), Speckhart

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