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US 4,795,331 AGranted
Mold vent plug
AssigneeThe Goodyear Tire & Rubber Company
InventorsDon A. Cain, Michael F. Dewaele
Life of this patent
Estimating the term…
Abstract
A vent plug for a mold having a head, neck and collar where the collar seats the plug in a bore in the mold, and the head forms an annulus with the bore for passage of air to the neck and past the collar to a cross vent and drilled hole providing a labyrinth to vent the mold. The bore may be counterbored to receive the head.
Claims16
A mold defining a cavity having walls surrounding the cavity and venting apparatus in a bore in the walls between the cavity and the outside atmosphere, comprising:
- a vent plug with a head of lateral area less than the area of the bore forming the opening to receive the plug which plug is located adjacent the cavity, the head defining a gap, between said head and said walls defining said bore, of generally annular form and generally uninterrupted;
- a plug portion having an indented annulus adjacent said head;
- an engaging portion for engaging the walls defining said bore;
- a body portion for guiding said plug into the bore and means for passing fluid past the engaging portion from the mold cavity, the passages formed by the gap, forming a labyrinth with the indented annulus and said means for passing fluid.
1 more element
Dependencies are inferred from the claim text.