초록 ▼

An air vent plug for clean container is disclosed, which includes a mounting ring, a plug body, and a plug cap, the plug cap having an inner ring fitted into the plug body, retaining notches forced into engagement with respective hooks of the plug body, an outer ring fitted over the outer surface of

An air vent plug for clean container is disclosed, which includes a mounting ring, a plug body, and a plug cap, the plug cap having an inner ring fitted into the plug body, retaining notches forced into engagement with respective hooks of the plug body, an outer ring fitted over the outer surface of the mounting ring, and top hooks extended from the outer ring and hooked on respective pegs at the outer surface of the mounting ring. An O-ring is mounted outside the plug body and stopped between a collar of the plug body and a bottom edge of the mounting ring for sealing. A filter is mounted inside the plug body to prevent contamination from air passing through the plug body and the air vent of the clean container.

대표청구항 ▼

1. An air vent plug arrangement installed in an air vent of a clean container, comprising: a mounting ring fixedly fastened to an air hole of said clean container, said mounting ring comprising an inner surface, an outer surface, a bottom side edge, and at least two pegs symmetrically provided at

1. An air vent plug arrangement installed in an air vent of a clean container, comprising: a mounting ring fixedly fastened to an air hole of said clean container, said mounting ring comprising an inner surface, an outer surface, a bottom side edge, and at least two pegs symmetrically provided at the outer surface of said mounting ring; a plug body comprising a top wall, an annular peripheral sidewall, a collar disposed outside and around said annular peripheral sidewall and dividing said annular peripheral sidewall into an upper part insertable into said mounting ring, and a lower part, and at least two hooks symmetrically axially extended from said lower part; and a plug cap adapted to secure said plug body to said mounting ring, said plug cap comprising a bottom wall, an outer ring upwardly extended from the bottom wall at an outer diameter thereof and fitted over the outer surface of said mounting ring, an inner ring upwardly extended from the bottom wall at an inner diameter thereof and being adapted to fit into said plug body, at least two top hooks respectively extended from the outer ring and being adapted to be hooked on said at least two pegs of said mounting ring, a top wall integral with a top side of the inner ring of said plug cap, and at least two retaining notches disposed in the inner ring of said plug cap adjacent to the bottom wall of said plug cap and being engageable with the at least two hooks of said plug body respectively. 2. The air vent plug arrangement as claimed in claim 1, further comprising an O-ring mounted outside the upper part of the annular peripheral sidewall of said plug body and being disposed between the collar of said plug body and the bottom side edge of said mounting ring.3. The air vent plug arrangement as claimed in claim 1, further comprising a filter mounted inside said plug body and retained between the top wall of said plug body and the top wall of said plug cap.4. The air vent plug arrangement as claimed in claim 1, wherein the hooks of said plug cap each have a front side and a beveled face at the front side.5. The air vent plug arrangement as claimed in claim 1, wherein the hooks of said plug cap each have a front side and a protruded portion projected from the front side.6. The air vent plug arrangement as claimed in claim 1, wherein the hooks of said plug cap each have a retaining notch disposed at a rear end of an inner side thereof.7. The air vent plug arrangement as claimed in claim 1, wherein the pegs of said mounting ring are oblong pegs.8. The air vent plug arrangement as claimed in claim 1, wherein the pegs of said mounting ring are circular pegs.9. The air vent plug arrangement as claimed in claim 1, wherein the hooks of said plug body each have a front side and a beveled face at the front side.10. The air vent plug arrangement as claimed in claim 1, wherein said mounting ring is fixedly fastened to the air vent of said clean container by ultrasonic welding.11. The air vent plug arrangement as claimed in claim 1, wherein the air vent of said clean container is disposed in a bottom panel of said clean container.12. The air vent plug arrangement as claimed in claim 1, wherein the top wall of said plug body has a slotted partition wall portion for the passing of air.13. The air vent plug arrangement as claimed in claim 1, wherein the top wall of said plug cap has a slotted partition wall portion for the passing of air.