Back to results
US 7,114,944 B2Granted
Tactical venting
AssigneeDavid Wolfe Design, Inc
InventorsDavid Kenneth Wolfe, Douglas Edward Pryor
Life of this patent
Estimating the term…
Abstract
A method of venting a rotational mold at a predetermined condition by actuating an actuating venting assembly pierces the shell of the molded article and introduces a passageway to relieve pressure during the molding cycle. The actuating venting assembly enables a tactical methodology for venting such molds.
Claims17
An actuating venting assembly for rotational molds comprises:
- a housing for attachment to the mold and being aligned or partially inserted through an opening to an internal cavity in a rotational mold, the housing having an internal cylinder;
- a movable piston, the movable piston having a body and a stem, the body being mounted in the internal cylinder, the stem having vent passages for allowing internal pressure of the mold to be vented upon actuation;
- the stem being adjacent to or extending from the body of the piston to a distal end;
- wherein the stem is a hollow tube having one or more venting passages adjacent to the distal end and one or more venting passages in proximity to the piston body in communication through a central opening or bore end in the hollow tube.
1 more element
An actuating venting assembly for rotational molds comprises:
- a housing for attachment to the mold and being aligned or partially inserted through an opening to an internal cavity in a rotational mold, the housing having an internal cylinder;
- a movable piston, the movable piston having a body and a stem, the body being mounted in the internal cylinder, the stem having vent passages for allowing internal pressure of the mold to be vented upon actuation;
- the stem being separate but adjacent to the body of the piston and extending to a distal end.
Dependencies are inferred from the claim text.