Piston pump device
AssigneeMedela Holding AG
InventorsManuel Ebert, David Imboden, Ivo Ramella
Life of this patent
Estimating the term…
Abstract
A piston pump device has a support unit, a pump cylinder, and a pump piston arranged in the pump cylinder. The pump cylinder has a longitudinal center axis, and a cylinder bottom arranged perpendicular to the longitudinal center axis. The pump piston is movable relative to the cylinder bottom, and the pump cylinder is secured on the support unit by a securing unit. The securing unit has a leaf spring, which permits a pivoting movement of the longitudinal center axis of the pump cylinder relative to the support unit. The piston pump device is wear-resistant and runs quietly. When used as a suction pump, the piston pump device additionally permits a controllable air flow until the pump comes to a stop.
Claims16
A piston pump device with a support unit, a pump cylinder, and a pump piston arranged in the pump cylinder, the pump cylinder having a longitudinal center axis, and a cylinder bottom arranged perpendicular to the longitudinal center axis, the pump piston being movable relative to the cylinder bottom, and the pump cylinder being secured on the support unit by a securing unit, wherein the securing unit has a leaf spring, which permits a pivoting movement of the longitudinal center axis of the pump cylinder relative to the support unit.
A suction pump comprising:
- a piston pump device having a support unit;
- a pump cylinder having a longitudinal center axis and a cylinder bottom arranged perpendicular to the longitudinal center axis;
- a pump piston arranged in the pump cylinder, the piston being moveable relative to the cylinder bottom;
- a securing unit for securing the pump cylinder on the support unit;
- a crankshaft for moving the pump piston;
- a motor for driving the crankshaft;
- and
- a gear mechanism connecting the motor and the crankshaft, the gear mechanism being a sing-stage gear;
- wherein the securing unit has a leaf spring which permits a pivoting movement of the longitudinal center axis of the pump cylinder relative to the support unit.
Dependencies are inferred from the claim text.