| 摘要 |
PCT No. PCT/DK89/00137 Sec. 371 Date Nov. 26, 1990 Sec. 102(e) Date Nov. 26, 1990 PCT Filed May 26, 1989 PCT Pub. No. WO89/11218 PCT Pub. Date Nov. 30, 1989.In rows of mink cages in mink farms it is characteristic that the animals relieve nature in the same end of the cages in which the animals' drinking valves are mounted, and the surplus water from the drinking valves, therefore, gets mixed with the manure, whereby the required manure tanks have to be much larger than necessary for the mere collection of the manure. According to the invention the drinking valves (4) are designed so as to produce a minimum of surplus water, but it is an associated risk that the valves may then fail to function in case of even quite small foreign bodies occurring in the watering water. For minimizing this risk the valve is designed such that the valve body (10), in an intermediate position thereof, allows for an essentially increased through-flow, which in normal use will occur briefly only, but nevertheless will be sufficient to cause a cleaning of the valve; the valve, therefore, can remain operative with a minimum of produced surplus water, whereby the manure tank can be made with a significantly reduced size.
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