Negative pressure wound therapy apparatus

An apparatus for applying negative pressure to a wound, comprising:

• a pump operatively coupled to a dressing and configured to apply negative pressure to the wound via the dressing, comprising:
• a magnetic circuit comprising a magnet;
• an electrically conductive coil;
• a diaphragm;
• and
• a valve assembly comprising:
• one or more valves configured to control a flow of fluid through the pump assembly,
• a first valve member comprising one or more recesses configured to receive the one or more valves therein,
• a second valve member, the one or more valves configured to be supported between the first valve member and the second valve member, and
• one or more protrusions configured to facilitate the flow of fluid around at least a portion of the one or more valves, wherein the one or more protrusions are configured to bias at least the portion of the one or more valves toward an open position that permits the flow of fluid through the one or more valves,
• wherein the coil is directly or indirectly coupled with the diaphragm and is configured to move at least a portion of the diaphragm to pump a fluid through the pump assembly.