Manufacturing process to make a valve ball

Details Manufacturing process to make a valve ball Manufacturing process to make a valve ball

2005-05-31

2005-05-31

Morgan, Eileen P. (Department: 3723)

Abrading

Abrading process

Roll, roller, shaft, ball, or piston abrading

C451S058000, C251S315160

Reexamination Certificate

active

06899599

ABSTRACT:
A manufacturing process to make a ball valve of the present invention includes the following steps: a) prepare flat circular metallic plates each of which has a rectangular indentation in a circumference; b) mold those plates into bowl shape; c) remove the circular bottom of the bowl shapes to reform a hemi-spherical shape by another mold; d) weld each pair of the hemi-spherical shapes into a spherical shape each of which has a pair of aligned openings and a lateral rectangular through hole; e) trim and grind the uneven connection seam; and f) polish and smooth the outer surface to finished a qualified ball valve which has uniform arc and thickness.

REFERENCES:
patent: 5380184 (1995-01-01), Von Holdt, Sr.
patent: 5979873 (1999-11-01), Wu

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