Internal-combustion engines – Valve – Reciprocating valve
Patent
1998-10-20
2000-10-03
Lo, Weilun
Internal-combustion engines
Valve
Reciprocating valve
F02N 300
Patent
active
061258091
ABSTRACT:
A valve for an internal combustion engine comprising a head with a seat ring and a stem that slidably fits in a valve guide, the stem having a necked down portion disposed between the head and the valve guide, the necked down portion being generally hour glass shaped and having a diameter that is reduced generally about 75 to 84 percent of the diameter of the portion of the stem that fits in the valve guide to reduce stresses on the head and improve proper seating of the valve to extend it life.
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Baehr Fred J.
Benton Jason
Caterpillar Inc.
Lo Weilun
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