Ball check valve

Details Ball check valve Ball check valve

1994-09-21

1996-04-16

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

F16K 1504

Patent

active

055073123

ABSTRACT:
A ball check valve including a valve cage having at least three elongated rods longitudinally disposed in the valve cage wall and extending into the cage interior for contacting the ball to prevent wearing of the cage wall when the ball moves back and forth in the cage responsive to fluid flow through the cage and check valve. In a preferred embodiment eight such rods are rotatably disposed in respective rod cavities provided in spaced relationship with respect to one another in the valve cage wall, to present a varying contact surface on the rods as the ball moves in the cage and thus prolong the life of the rods. In a second embodiment, the rods are fixedly mounted in the respective rod cavities.

REFERENCES:
patent: 960944 (1910-06-01), Johnson
patent: 1777539 (1930-10-01), Yerkes
patent: 2085360 (1937-06-01), Hammett
patent: 2137402 (1938-11-01), Hoferer
patent: 2274968 (1942-03-01), O'Barrion
patent: 2937659 (1960-05-01), Harris et al.
patent: 3219057 (1965-11-01), Knowles
patent: 3724496 (1973-04-01), Secrist
patent: 3827122 (1974-08-01), Douglas
patent: 4070237 (1978-01-01), Woodward
patent: 4091839 (1978-05-01), Donner
patent: 4243067 (1981-01-01), Rubey
patent: 4674529 (1987-06-01), Ferguson

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