Piston pump and device for feeding and metering a fluid for medical purposes by means of a piston pump
US9427517B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 2013 |
| Grant date | Aug 30, 2016 |
| Priority date | — |
| Expiry date | Mar 8, 2033 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61M2205/3375
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A piston pump is described for pumping a fluid, comprising at least two cylinders each having a piston which is movable inside the associated cylinder along the longitudinal axis of the cylinder by means of a drive, wherein cylinders are attached to a common pump flange. In each cylinder a chamber is formed having a volume that changes when the associated piston is moved in the cylinder. The pump flange extends along the direction of motion of the pistons, and at least one inlet port and one outlet port are attached to the pump flange, whose longitudinal axes run along the pump flange. A central valve plate is attached to the side of the pump flange facing away from the cylinders that bear on the pump flange and continuously rotates transversely to the pump flange during pumping operation of the piston pump. Respective passages are introduced to the pump flange in the region of each inlet and outlet port, and cylinder openings are introduced to the pump flange in the region of each cylinder. The valve plate has at least two cavities on the flange side, of which a first cavity coincides, upon rotation of the valve plate to a first angular position, with a cylinder opening of a first…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.