MANUAL TYPE PRE-COMPRESSION PUMP FOR SPRAYING LIQUID

摘要

PURPOSE: To provide a small-size and simple-design liquid distributing unit with a small number of components including a precompression pump. CONSTITUTION: This precompression pump 1 for spraying liquid at a constant pressure has a first piston 7 with an axis X formed with a manipulating member 6 and forming a cylindrical pumping chamber 2; a cylindrical main body 3 accommodating the piston 7 abutting on a first spring 9 provided in the chamber 2; a second piston 10 with an axis Y abutting on a second spring 11; and a cylindrical precompression chamber 5 communicating with the pumping chamber 2. The precompression chamber 5 is disposed in an extension of the pumping chamber 2, while liquid accommodated in the pumping chamber 2 directly flows into the precompression chamber 5 in operation of the manipulating member 6.