| 摘要 |
A portable apparatus for feeding liquid under pressure to an applicator, comprises a vessel having a pressurizing assembly associated therewith, the assembly having a housing for receiving a capsule of pressurized gas and having pressure reducing means. A first fluid path extends from the high pressure side of the pressure reducing means and communicates with the outlet of the capsule inserted, in use, in the housing. The vessel has defined therein a first chamber and a second chamber, the second chamber containing, in use, the liquid to be fed to the applicator. A diaphragm is disposed between the first and second chambers. A second fluid path extends from the low pressure side of the pressure reducing means and communicates with the second chamber. Gas is allowed to flow through the diaphragm between the first and second chambers to equalize the pressure in said chambers; but flow of liquid is inhibited from the second chamber to the first chamber whereby the liquid is inhibited from reaching other parts of the apparatus. Preferably this is accomplished by having a small hole or a slit in the diaphragm. A feed conduit is connected to the vessel and communicates with the second chamber for transferring liquid from the second chamber to the applicator. The second chamber may be defined by a liquid container received within the vessel. |
