Patent ID: 9033953
Filing Date: 2015-05-19
Classification: A61M

Abstract:
1. A suction pump unit comprising: a vacuum port; an excess pressure port; and a switching valve, wherein the switching valve comprises a valve body with a first input and a second input, wherein the first input is connected with the vacuum port, and the second input is connected with the excess pressure port, and wherein the switching valve comprises an output defining a through hole, wherein the output can be moved relative to the inputs from the first input to the second input and back, such that the through hole alternately establishes a fluid-communicating connection with one of the first input or the second input, wherein the through hole of the output is released and ventilated during at least part of the movement of the output between the first input and the second input, and wherein the switching valve comprises a first electromagnet with a first coil and a second electromagnet with a second coil, wherein each coil is interspersed by a ferromagnetic, hollow core, wherein a first core forms the first input and a second core forms the second input, and wherein the output comprises a permanent magnet.