| 摘要 |
PURPOSE:To facilitate smooth pumping operation, in a pressure-accumulating type sprayer which prepresses air in a vessel, by arranging a one-way valve at each top end part of a cylinder and a piston to release residual high pressurized air into the atmosphere. CONSTITUTION:A pressure-accumulating valve 42 is a one-way valve which allows the flow of air into a vessel only. Through this pressure-accoumulating valve 42, air inflows into a chamber 56 and a pressure is accumulated there. A big diameter piston 60 is locked to a cylinder 16 by a locking means 66, while a small diameter piston 61 is moved back and forth inside the big diameter piston 60, so as to further accumulate high pressurized air in the vessel 12. In this case, an airtight-breaking means 74 is attached to the inside wall of the cylinder 16, to prevent the action, as a resistance, of residual pressurized air in the chamber 56. Consequently, the residual air in the pressurized chamber 56 is released through a gap 80 into the atmosphere, and the airtightness of the big diameter piston 60 is released. As a result, the piston 54 can easily move to its locking position without any resistance. |
