Patent ID: 7287547
Filing Date: 2007-10-30
Classification: F04B,F16K,Y10T

Abstract:
1. An inlet or outlet pump valve, said pump valve comprising: a pump valve closing body having a guiding portion and a closing cylinder with a flat closing face, said face including a perimeter, said closing body pre-tensioned by a spring element such that movement of said closing body can open or close a passage at least partially defined by a flat valve seat; and a pump valve guide element connected to the valve seat by means of a press fit, the pump valve guide element including: a cylindrical portion having a length in a first direction, wherein at least a portion of the spring element is disposed within the cylindrical portion; and a plurality of arms disposed outwardly of an external circumference of the cylindrical portion and extending in the first direction along and beyond the length of the cylindrical portion; wherein the guiding portion of the pump valve closing body is guided inside a first guide area defined by an opening formed in the cylindrical portion of the pump valve guide element, and wherein an end of the closing cylinder of the pump valve closing body is guided inside a second guide area defined by the plural arms of the pump valve guide element, such that the perimeter is in physical contact with each of the plurality of arms; and wherein the pump valve is configured to allow a transfer flow in the axial direction.