| 摘要 |
PCT No. PCT/SE93/00013 Sec. 371 Date Jul. 13, 1994 Sec. 102(e) Date Jul. 13, 1994 PCT Filed Jan. 12, 1993 PCT Pub. No. WO93/14020 PCT Pub. Date Jul. 22, 1993.A self-closing funnel includes a downwardly narrowing flow-receiving part 1, a tubular spout 2 extending from the receiving part, and a float 5 which is movable within the spout. The funnel further includes a float-control valve 11, 12 and a permanent magnet 10 which influences the closing movement of the valve. The funnel includes a spring 9 which in the active state of the float counterbalances an essential part of its intrinsic weight, and a constriction 11 provided upstream of the float is configured so that the flow area 8 through the construction is smaller than the flow area between the spout and the float. |
