Method of making a valve seat retainer

Details Method of making a valve seat retainer Method of making a valve seat retainer

1995-10-25

1998-01-06

Cuda, Irene

Metal working

Method of mechanical manufacture

Prime mover or fluid pump making

2988806, B23P 1500

Patent

active

057041210

ABSTRACT:
A valve seat retainer is formed having a flange that extends over the valve seat and that applies both a radial and a longitudinal force to the valve seat. The flange extends an order of magnitude further than typical prior art valve seat retaining flanges. The flange is created by a rolling method with a roller having a unique surface profile. The roller surface has a pair of spaced ridges with a groove in between, and a curved convex surface adjacent to one of the ridges. When a downward force is applied to the roller, the curved surface on the roller causes the roller to move radially inward while at the same time material from the upper surface of the engine block is disposed in the groove and is moved to create the flange.

REFERENCES:
patent: 1783884 (1930-12-01), Lee
patent: 1795433 (1931-03-01), Leipert
patent: 1949613 (1934-03-01), McDonald
patent: 1949614 (1934-03-01), McDonald
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patent: 2165311 (1939-07-01), Stancliff
patent: 3285235 (1966-11-01), Euberschaer
patent: 3487823 (1970-01-01), Tarter et al.
patent: 3669408 (1972-06-01), Baxter, Jr.
patent: 4763876 (1988-08-01), Oda et al.
patent: 4831976 (1989-05-01), Pozniak et al.

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