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US 8,113,818 B2Granted
Valve gate system
OwnerPanos Trakasinventor
Life of this patent
Estimating the term…
Abstract
A valve gate assembly comprises a piston that is actuable between a forward position and a rear position and has a piston stop surface and a forward pressure surface. A cylinder has a cylinder stop surface that is disposed to contact the piston stop surface when the piston is in the forward position. The cylinder stop surface is radially outward of at least a portion of the forward pressure surface and a shutoff pin is substantially aligned with the axis.
Claims17
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
- a cylindrical wall having a forward end;
- a piston stop surface extending radially inwardly from the forward end of the first cylindrical wall and terminating in a radially inward end;
- a forward pressure surface extending radially inwardly from the inward end of the piston stop surface such that a fluid acting on the forward pressure surface will urge the piston in a rearward direction;
- the cylinder having
- a cylindrical first wall formed to be parallel to the axis, the piston axially displaceable along the wall;
- a forward opening for positioning adjacent the hot manifold and communicating with a hot manifold pin hole;
- a cylinder stop surface disposed to contact the piston stop surface with the piston in the forward position, the cylinder stop surface being radially outward of at least a portion of the forward pressure surface of the piston;
- 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.
8 more elements
A valve gate assembly for use with a hot manifold, the assembly formed around an axis and comprising:
- a cylinder and a piston actuable along the axis within the cylinder between a forward position and a rear position, the piston having
- a cylindrical wall having a forward end;
- a piston stop surface extending radially inwardly from the forward end of the cylindrical wall and terminating in a radially inward end;
- a forward pressure surface extending radially inwardly from the inward end of the piston stop surface, such that a fluid acting on the forward pressure surface urges the piston in a rearward direction;
- the cylinder having
- a cylindrical first wall formed to be parallel to the axis, the piston axially displaceable along the first wall;
- a forward opening for disposal adjacent the hot manifold and communicating with a hot manifold pin hole;
- a cylinder stop surface disposed to contact the piston stop surface with the piston in the forward position
- a chamber disposed forwardly of the cylinder stop surface;
- and
- an open gate supply port opening onto the chamber and in fluid communication with the forward pressure surface, the open gate supply port being forward of the cylinder stop surface.
8 more elements
A valve gate assembly comprising:
- a piston actuable along an axis between a forward position and a rear position, the piston having
- a cylindrical wall having a forward end;
- a piston stop surface extending radially inwardly from the forward end and terminating in a radially inward end;
- a forward pressure surface extending radially inwardly from the inward end of the cylindrical wall of the piston stop surface;
- and
- a cylinder having
- a cylindrical wall formed to be parallel to the axis and in slidable engagement with the cylindrical wall of the piston;
- a forward opening communicating with a hot manifold pin hole;
- a cylinder stop surface disposed to contact the piston stop surface with the piston in the forward position;
- a chamber for collecting debris, the chamber being forward of the forward end of the cylindrical wall of the piston;
- a purging supply port in fluid communication with the chamber for purging the chamber with a purging fluid;
- and
- an exhaust port for exhausting the purging fluid out of the chamber, the exhaust port being in fluid communication with the chamber.
10 more elements
Dependencies are inferred from the claim text.