Ball valve and production method therefor

Details Ball valve and production method therefor Ball valve and production method therefor

2005-07-12

2005-07-12

Keasel, Eric (Department: 3754)

Valves and valve actuation

Rotary valves

Ball valve

C137S015220, C029S890130

Reexamination Certificate

active

06916011

ABSTRACT:
The invention provides a ball valve excelling in economy due to the efforts devoted to the reduction of cost, enjoying light weight and high reliability, manifesting high and uniform accuracy, and enabling manufacture of compact finished products having a small interface dimension, and provides a method for the production of the ball valve. The ball valve includes a body formed from a pipe having a predetermined length by subjecting opposite terminal parts (ends) of the pipe to a plastic processing including flaring and diametrical contraction. The body has at a central position a seat-shaping part (seat) formed with a stem-inserting hole, a stem inserted into the stem-inserting hole, a ball disposed non-rotatably at a lower terminal of the stem, and a pair of inserting members having an annular shape forced into the body from opposite terminals of the body. Opposite terminal faces of the body are compression-formed so that the pair of inserting members receive and support the ball rotatably.

REFERENCES:
patent: 2573177 (1951-10-01), Bohlen
patent: 3490734 (1970-01-01), Freeman
patent: 3584833 (1971-06-01), Grenier
patent: 3819149 (1974-06-01), Kinder
patent: 4545564 (1985-10-01), Krosoczka et al.
patent: 4546790 (1985-10-01), Huber et al.
patent: 5586749 (1996-12-01), Conley et al.
patent: 5890286 (1999-04-01), Eklof
patent: 62-165081 (1987-07-01), None
patent: 63-266276 (1988-11-01), None
patent: 10-122390 (1998-05-01), None

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