| 摘要 |
A pneumatic ejector comprises a rigid support member having a base portion and an upstanding boss integral with the base portion, and an elastomeric ejection element having a diaphragm portion and a skirt portion surrounding the diaphragm portion and secured to the boss. The support member has an air inlet passage for supplying air under pressure to move the diaphragm away from the boss. The upper end of the upstanding boss is concave and the diaphragm is of complementary shape. The diaphragm has an integral protrusion upstanding from a central region of the diaphragm. Additionally, the diaphragm has an integral protrusion which depends from a central region of the diaphragm and which extends into a through bore in the upstanding boss, the through bore communicating with the air inlet passage in the support member.
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