Patent ID: 7461542
Filing Date: 2008-12-09
Classification: G01N

Abstract:
1. A viscosimeter for measuring the funnel viscosity of a liquid comprising: a) a funnel section having an open upper end and a lower apex; b) a tubular section connected to the funnel section at the apex and defining an orifice passage, for draining the funnel section, whereby the liquid flows from the funnel section through the orifice passage; and c) a mechanical device for selectively closing and opening the orifice passage wherein the mechanical device is a valve mounted on the viscosimeter and being movable between a closed position and an open position to selectively close and open the orifice passage, wherein the valve is mounted internally of the funnel section and comprises a stem extending upwardly within the funnel section having an upper end and a lower end sized to close the inlet of the orifice passage, wherein the stem extends axially through the funnel section and includes a spring for urging the lower end of the stem into engagement with the inlet of the orifice passage, and further includes a valve actuator operative on the upper end of the stem to move the stem upwardly against the spring thereby moving the lower end of the stem away from the inlet of the orifice passage.