Importance

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Abstract

A dispensing head includes a housing defining an interior chamber and an inlet formed in the chamber. The inlet supplies the chamber with viscous material under pressure from a source of material. The dispensing head further includes a piston disposed in the chamber and a nozzle secured to the housing at a lower end of the chamber. The nozzle has an orifice extending in a direction co-axial with the chamber, with one of the housing and the nozzle defining a bottom wall of the chamber. The dispensing head further includes a valve seat provided on the bottom wall of the chamber. The valve seat includes a body having a valve seat surface disposed above the bottom wall of the chamber, with the body having an opening co-axial with the orifice of the nozzle to enable viscous material to flow through the valve seat surface during a dispensing operation.

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First Claim