Multi-piece valve for reciprocating piston engines

Details Multi-piece valve for reciprocating piston engines Multi-piece valve for reciprocating piston engines

2005-09-06

2005-09-06

Kamen, Noah P. (Department: 3747)

Internal-combustion engines

Valve

Reciprocating valve

Reexamination Certificate

active

06938602

ABSTRACT:
The invention relates to a multi-piece valve for reciprocating piston engines in which the valve stem is connected to the valve head in a manner resistant to both tension and compression. In the area of a center through-opening the valve head has an annular bearing surface for a stem-side flange. In addition, the center opening widens on the combustion chamber-side of the valve head, the head-side end of the valve stem being plastically expanded so that it fills this enlargement, forming a positive interlock. In order to improve the service life of the connection between valve head and valve stem, according to the invention the combustion chamber-side enlargement of the center opening and accordingly also the conformed, end-side expansion of the valve stem are of non-circular design so that a positively interlocking torsionally fixed connection is produced between the valve stem and the valve head.

REFERENCES:
patent: 2136690 (1938-11-01), Jardine
patent: 4359022 (1982-11-01), Nakamura et al.
patent: 100 29 299 (2002-01-01), None
patent: 100 38 332 (2002-02-01), None
patent: 0 296 619 (1988-12-01), None
patent: WO 94/19143 (1994-09-01), None

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