Patent ID: 8932040
Filing Date: 2015-01-13
Classification: B29C,G01B

Abstract:
1. An injection unit comprising: (a) a cylinder casing comprising an inner cylindrical surface extending along an axis; (b) a piston housed in the casing and translatable along the axis between an advanced and a retracted position, the piston comprising a piston radial surface in facing relation to the inner cylindrical surface, the piston radial surface comprising a measurement detection feature; c) a probe fixed relative to the cylinder casing, the probe communicating with the measurement detection feature when the piston is in and moving between the advanced and retracted positions to measure the translation of the piston, wherein the cylinder casing comprises an outer surface spaced radially outward from the inner cylindrical surface and a cavity extending therebetween, the cavity having opposed open ends at the inner cylindrical surface and the outer surface, and wherein at least a portion of the probe is received within the cavity.