Fluid handling – Systems – With selective motion for plural valve actuator
Patent
1981-07-13
1983-02-08
Walton, George L.
Fluid handling
Systems
With selective motion for plural valve actuator
119 1418, 134166C, 251 5, 251 6, 251 58, 251 9, 285397, B08B 308, F16L 5514
Patent
active
043723454
ABSTRACT:
A fail-safe valve (10) for precluding contamination of fluid, such as milk, having passed through a main fluid flow line (12) from an input end, such as a milking claw, to a collection and storage tank is the subject of this application. A flushing conduit (46) through which flushing water or a sanitizing agent flows intersects the main fluid flow line (12).
A pinching element (54) is provided with a first arm (56) for pinching closed the main line (12) at a resilient portion thereof down-flow from the intersection (48) of the conduit (46) with the main line (12). The element (54) also includes a second arm (58) which is angularly spaced from the first arm (56). The pinching element (54) is mounted for pivoting about an axis so that, when the element (54) is in its first position, the main line (12) will be pinched closed. With the element (54) in this first position, the flushing conduit (46) will not be occluded. When the element (54) is pivoted to its second position, the second arm (58) will pinch the conduit (46) closed preventing flow therethrough. With the element (54) in the second position, flow through the main fluid flow line (12) will be unobstructed.
REFERENCES:
patent: 1996855 (1935-04-01), Cheswright
patent: 2183835 (1939-12-01), Foulke
patent: 2659387 (1953-11-01), Farris
patent: 3016915 (1962-01-01), Moeller, Jr.
patent: 3269754 (1966-08-01), Bertling et al.
patent: 3385265 (1968-05-01), Schrader
patent: 3744524 (1973-07-01), Blau
patent: 3754768 (1973-08-01), Ellis et al.
patent: 4020871 (1977-05-01), Groth et al.
Economics Laboratory Inc.
Walton George L.
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