Patent ID: 8113818
Filing Date: 2012-02-14
Classification: B29C,F16K

Abstract:
1. A valve gate assembly for use with a hot manifold, the valve gate assembly formed around an axis and comprising: a piston and a cylinder, the piston actuable along the axis within the cylinder between a forward position and a rear position, the piston having the cylinder having a chamber disposed forwardly of the cylinder stop surface, an open gate supply port opening onto the chamber and in fluid communication with the forward pressure surface of the piston; and a shutoff pin substantially aligned with the axis and having an elongated shaft with a front end forward of the cylinder and a rear end affixed to the piston, the shaft passable through the forward opening and the hot manifold pin hole to a gate of a mold, the front end of the shutoff pin operable to open and close the gate.