Pump for variable dosing
OwnerDan Broninventor
Life of this patent
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Abstract
A variable dosing piston pump having a cylinder made of two parts, the fixed part through which the piston rod extends and a part adapted to be inserted more or less within said fixed part and means to fix said parts relative to each other, an outlet in said fixed part for the dosed liquid, an inlet controlled by a non-return valve in said movable part, the piston having a diameter adapted to that of the movable part and comprising a non-return valve. By changing the positions of the two cylinder parts relative each other, and retaining the same piston movement, the effective stroke of the piston is changed, thereby changing the dosing.
Claims4
A variable dosing piston pump having a cylinder, a piston housed in said cylinder and a piston rod attached to said piston, the cylinder being made of two parts, namely a fixed part through which the piston rod extends and a movable part adapted to be inserted within said fixed part and means to fix said parts relative to each other, an outlet in said fixed part for the dosed liquid, an inlet controlled by a non-return valve in said movable part, the piston having a diameter corresponding to that of the movable part and said piston comprising a non-return valve.
Dependencies are inferred from the claim text.