| 摘要 |
553,186. Milking-machine valves. ALFALAVAL CO., Ltd., and CLARK, T. L. Dec. 11 1941, No. 16007. [Class 84] A milking machine pulsator is provided with a needle valve comprising a tapered throttling element 2 movable to restrict or close the aperture in the bush 8, and an end portion 3 working with clearance in the aperture. Throttling may be adjusted by a nut 7, and cleaning effected by depressing the protruding end 6 against the action of the spring 9. Specification 373,300 is referred to.
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