| 摘要 |
An aerosol valve (10) adapted to be secured to the neck of a container (C) may be manufactured from synthetic plastic material and includes a main body (11), a flexible valve housing and seat member (26) secured and sealed to the main body, and a poppet valve (35) freely reciprocable in the space defined between the main body and flexible housing. The flexible housing (26) has a valve seat (33) and the poppet valve (35) has a valve head (36) arranged to seat on the valve seat. The main body has a poppet retainer (24, 25) and the poppet valve has a tail piece (37) with a detent (38) thereon in a position to cooperate with the retainer on the main body to limit movement of the poppet valve. The flexible housing includes a diaphragm (29) with a preset bias tending to close the valve head on the valve seat, and an actuator (46) may be manipulated to overcome the bias and unseat the valve head from the seat to enable flow of product from the container. In another form (60) of the invention, plural seating surfaces (73, 74 and 33, 36) are provided on the poppet valve (61) and flexible valve housing (62). In a further form (109) of the invention, a second valve head (110) is on the poppet opposite the first valve head (36) for cooperation with a second valve seat (40) to obtain metered dispensing.
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