Patent ID: 7770763

Claim:
A precision cover ( 1 ) for closing a container of liquid or particulate product, wherein a top of the cover ( 1 ) forms a spout ( 5 ) with a sliding seal ( 2 ) configured to slide against the spout ( 5 ) and connected to a spring ( 4 ), a sliding motion of the sliding seal ( 2 ) against the spout ( 5 ) controlled by a pivoting opening lever ( 3 ), wherein the pivoting opening lever ( 3 ), in a first mode, controls the sliding seal ( 2 ) such that the sliding seal ( 2 ) slides against the spout ( 5 ) by a low value (a) relative to an opening of the spout ( 5 ) via an angular shift (α) of the pivoting opening lever ( 3 ) so as to enable an operator to meter a flow rate of contents of the container with very high precision, and wherein the pivoting opening lever ( 3 ), in a second mode, controls the sliding seal ( 2 ) such that the sliding seal ( 2 ) slides against the spout ( 5 ) by a higher value (b) relative to the opening of the spout ( 5 ) via the angular shift (α) of the pivoting opening lever ( 3 ) so as to enable an operator to meter a flow rate of the contents of the container with a high value of opening.