| 摘要 |
A dispensing or suction pump includes a reciprocating hollow piston (2A) sliding in a cylinder (2B). Piston and cylinder are connected by a spring (2C), which retracts the piston into the cylinder during the discharge stroke. The spring is attached to the piston and cylinder by four spring supports (21) and fixed by screws inserted into the respective screw holes (2D). The cylinder has a flange (2F) containing a one-way valve (2H) and supports for attachment of a hose or container. |
