Patent ID: 8960071
Filing Date: 2015-02-24
Classification: F04B,F16J,G01N

Abstract:
1. A pump comprising: a seal wash housing having an abutment surface, a surface opposite to the abutment surface, a gland extending from the abutment surface and a bore extending from the gland to the surface opposite the abutment surface; a pump head having an abutment surface adjacent to the abutment surface of the seal wash housing, a fluidic chamber extending at one end from the abutment surface of the pump head, an inlet port in fluidic communication with the fluidic chamber and an outlet port; a movable rod disposed in the bore and configured for axial movement within the fluidic chamber; a seal assembly disposed in the gland of the seal wash housing, the seal assembly having a first sealing surface having an inner diameter and being in sealing engagement with a surface of the movable rod, the seal assembly having a second sealing surface having an outer diameter and being in sealing engagement with a portion of the abutment surface of the pump head adjacent to the gland, wherein a seal cavity is defined between the seal assembly and the abutment surface of the pump head that is inside the outer diameter of the second sealing surface, the seal cavity defining a portion of a fluidic path that couples the fluidic chamber to the outlet port; and a fluid channel having a first end at an interface of the abutment surfaces of the seal wash housing and the pump head outside the outer diameter of the second sealing surface, and having a second end disposed at a diagnostic port on an outer surface of the pump head or the seal wash housing.