| 摘要 |
This invention relates to pressure dispensing pumps which are capable of dispensing a predetermined amount of a fluent mass whether thus mass be liquid, semi-liquid, semi-solid or of a gel or paste like substance. The invention comprises a pressure dispensing pump (1) having a housing (2) adapted to be attached to a fluent container said housing including an inlet port (3) said dispensing pump including a valve means (4) for said inlet port and further comprising a pressure chamber portion (5) which integrally includes an outlet port with valve means (7) to close said outlet port. The invention also includes a pressure dispensing pump containing a pressure chamber portion (5) which comprises a collapsible wall portion (9) terminating in a substantially planar pressure surface (10). Further the pressure chamber can be of an asymmetrical configuration. |
