| 摘要 |
<p>PCT No. PCT/EP92/02167 Sec. 371 Date Sep. 20, 1994 Sec. 102(e) Date Sep. 20, 1994 PCT Filed Sep. 19, 1992 PCT Pub. No. WO93/09368 PCT Pub. Date May 13, 1993.In order to protect a cup-seal non-return valve (1) against permanent deformation, it is suggested to provide radial supporting walls (15) between the cylindrical inner wall (10)* (*translator's note: the correct reference numeral is '14') and the sealing lip (13). Preferably, three supporting walls (15), roughly 1 mm thick, are provided because both the natural stability and the valve function are safeguarded this way.</p> |
