Method of forming valve seats

Details Method of forming valve seats Method of forming valve seats

1979-01-02

1980-07-01

Crane, Daniel C.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29451, 277 1, B23P 1500, B23P 1102

Patent

active

042098840

ABSTRACT:
A method of forming a valve seat having a resilient plastic insert received in a serrated groove of the seat. The insert is inserted into the groove and is pressed therein with a power driven ram to effect cold flowing of the insert into serrations in the sides of the groove. The insert is then subjected to hydraulic fluid at a relatively high pressure level to completely bottom the insert against the bottom of the groove prior to machining of a protruding sealing surface of the insert. The invention is directed additionally to another method which includes the step of swaging a lip into the insert to secure it in a non-serrated groove of a valve seat. Hydraulic fluid pressure is then applied to the insert to completely bottom it in the groove prior to installation of the seat in a valve body.

REFERENCES:
patent: 2856677 (1958-10-01), Rekettye
patent: 2925994 (1960-02-01), Downs et al.
patent: 3087232 (1963-04-01), Dow
patent: 3222762 (1965-12-01), Nowlin
patent: 3581379 (1971-06-01), Drobilits
patent: 3694894 (1972-10-01), Jelinek et al.

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