Vent plug
AssigneeBurnswick Industrial Supply Co.
InventorsJohn E. Prunty, II, Jeffrey D. Eagens
Life of this patent
Estimating the term…
Abstract
A vent plug used in a chamber for manufacturing sand molds by a blow-squeeze process is configured to provide turbulent swirling flow of air vented from the chamber past the vent plugs to minimize build-up of deposits on the surfaces of the vents and vent plugs.
Claims33
A vent plug comprising:
- a substantially circular head having a central axis, a substantially flat front face, an outer peripheral surface and a rear portion;
- said rear portion including mounting means for mounting said vent plug in a vent hole while providing air flow past said outer peripheral surface;
- and,
- said rear portion including sloping rear surface means which slopes toward said axis in a direction away from said front face.
A vent plug comprising:
- a substantially circular head having a central axis, a substantially flat front face, an outer peripheral surface, and a rear surface opposite from said front face;
- mounting means for mounting said vent plug in a hole while providing air flow past said peripheral surface;
- said peripheral surface being substantially cylindrical and intersecting said rear surface at a rear edge;
- and,
- said rear surface sloping from said rear edge toward said axis at an included angle with said axis of substantially less than 90.degree..
A vent plug comprising:
- a substantially circular head having a central axis, a substantially flat front face, an outer peripheral surface, and a rear surface opposite from said front face;
- a spider on said rear surface having a plurality of spaced-apart spokes which terminate at spoke terminal ends lying on the periphery of a circle having a diameter greater than the diameter of said head, said spider having a rear face which faces outwardly in a direction generally opposite from the facing direction of said front face;
- adjacent spokes of said spider being spaced apart by generally U-shaped spaces whose periphery is defined by side surfaces of said spokes and by curved spoke juncture portions at the inner end portions of said spokes;
- said rear surface of said head being sloped from said outer peripheral surface of said head toward said central axis in a direction from said outer peripheral surface of said head toward said rear face of said spider;
- and,
- said rear surface of said head intersecting said juncture portions of said spokes along intersection lines which are axially spaced from said rear face of said spider.
A plate for a chamber in which sand molds are blown, a stepped circular hole through said plate and including a large diameter bore intersecting an inner face of said plate, an intermediate diameter bore extending concentrically from said large diameter bore, and a small diameter bore extending concentrically from said intermediate diameter bore and intersecting an outer face of said plate, a vent plug having mounting means mounted in said intermediate diameter bore, and
- said vent plug including a substantially circular head which is smaller in diameter than said large diameter bore, an outer peripheral surface, and a rear portion including said mounting means, and said vent plug being mounted by said mounting means so the outer peripheral surface of said head is spaced radially inward from said large diameter bore for allowing air flow pass said outer peripheral surface.
Dependencies are inferred from the claim text.