Oil-sealing valve guide insert and method of manufacture

Details Oil-sealing valve guide insert and method of manufacture Oil-sealing valve guide insert and method of manufacture

1987-02-25

1988-09-06

Scott, Samuel

Internal-combustion engines

Valve

Valve head cooperates with manifold

384292, 291567R, 2940208, F01L 300

Patent

active

047684798

ABSTRACT:
A slitted tubular valve guide is provided with a substantially spiral groove along its entire length. At each point of intersection between the spiral groove and the slit, the ends of the groove segments immediately adjacent the slit are offset by an amount sufficient to create a discontinuity in the groove. The spiral groove is, therefore, divided into a number of inclined, decoupled groove segments incapable of flowing lubricating oil along their linear extent to the combustion chamber. The tubular valve guide is rolled from flat stock having inclined parallel groove segments preformed in the surface.

REFERENCES:
patent: 314079 (1885-03-01), Thayer et al.
patent: 1132758 (1915-03-01), Bache
patent: 2303145 (1942-11-01), Taylor
patent: 3153990 (1964-10-01), Kunzog
patent: 3265052 (1966-08-01), Goloff
patent: 3581728 (1971-06-01), Abraham
patent: 3828415 (1974-08-01), Kammeraad et al.
patent: 3828756 (1974-08-01), Kammeraad et al.
patent: 4103662 (1978-08-01), Kammeraad

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