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US 2019/0210907 A1Published application
Parison Plunger Actuation
AssigneeOwens-Brockway Glass Container Inc.
InventorsEdward A. Grant, Thomas R. Kirkman, Ronald Rook
Life of this patent
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Abstract
An apparatus and a method of actuating a parison plunger includes transforming linear force applied to a plunger extension into roto-translational motion of the plunger extension via a cam path between the plunger extension and a piston.
Claims21
A parison plunger actuator for actuating a parison plunger for forming a parison of a container, comprising:
- a plunger cartridge that includes;
- a plunger extension sub-assembly that has
- a plunger extension carrying cam follower mounts;
- and
- cam followers carried by the cam follower mounts of the plunger extension.
2 more elements
A parison plunger actuator for forming a parison of a container, comprising:
- a plunger cylinder assembly that includes:
- a cylinder housing;
- an actuator piston reciprocably carried in the cylinder housing;
- and
- a piston rod coupled to the piston;
- and
- a plunger cartridge carried by the plunger cylinder assembly and that includes:
- a plunger extension sub-assembly that has:
- a plunger extension carrying cam follower mounts;
- at least two sets of cam followers carried by the cam follower mounts of the plunger extension, wherein the sets of cam followers include cam followers that are axially spaced apart and circumferentially spaced apart;
- a plunger extension center support disposed radially inward with respect to the plunger extension and coupled to the piston rod of the plunger cylinder assembly;
- and
- a piston disposed radially outward with respect to the plunger extension and including a wall having a cam path to receive and guide the cam followers;
- a thimble lock carried radially outwardly of the plunger extension;
- a plunger pull spring disposed radially outward with respect to the thimble lock and axially between corresponding portions of the thimble lock and the plunger extension;
- and
- a load position spring disposed radially outward with respect to the piston and axially against a portion of the piston.
14 more elements
A method of operating a parison plunger actuator, wherein the method comprises the steps of:
- a) advancing a plunger extension along a longitudinal axis through a piston;
- and
- b) retracting the plunger extension by a roto-translational motion, wherein said plunger extension is rotated around the longitudinal axis while being longitudinally retracted, wherein the roto-translational motion for the retraction of the plunger is generated by:
- imposing a linear force on the plunger extension, and
- transforming said linear force on said plunger extension into said roto-translational motion of said plunger extension via a cam path between said plunger extension and said piston.
2 more elements
Dependencies are inferred from the claim text.