| 摘要 |
PCT No. PCT/EP90/02280 Sec. 371 Date Aug. 24, 1992 Sec. 102(e) Date Aug. 24, 1992 PCT Filed Dec. 21, 1990 PCT Pub. No. WO91/13281 PCT Pub. Date Sep. 5, 1991.A valve for a dispenser has a spherical valve body which is fixed in the closed position by a catch mechanism. When a predetermined dispensing pressure is applied, the valve body is moved out of the locked position and displaced, like a piston, into a sealed receiving chamber, in which it is fixed. This results in a very simple, reliable closure of the outlet channel, which only needs to be opened once.
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