Patent ID: 8241019
Filing Date: 2012-08-14
Classification: F04B

Abstract:
1. A pump element comprising: a pump element housing defining a pump chamber; an inlet into the pump chamber; an outlet from the pump chamber; a first movable element movable in the pump chamber between a first and a second position, wherein during a movement of the first movable element in the direction from the first to the second position, a flow resistance of a flow path from the first movable element through the inlet is higher than a flow resistance of a flow path between the pump element housing and the first movable element, and wherein during a movement of the first movable element in the direction from the second position to the first position, a flow resistance of a flow path from the first movable element through the outlet is smaller than a flow resistance of the flow path between the pump element housing and the first movable element, so that a net flow through the outlet takes place during a reciprocating movement of the first movable element between the first and the second position, wherein the first movable element closes the outlet when the same is in the first position.