Sealing unit for sealing opening with smooth inner periphery

Abstract

A sealing unit for sealing a jar includes an inner cap having a flange and an outer groove is defined in the outer periphery of the flange. A resilient ring has a bent portion which is engaged with the outer groove. An outer cap has an annular recess in the underside thereof and the flange of the inner cap is engaged with the annular recess. The outer cap has an inner groove defined in the inner wall thereof and the resilient ring is engaged with the inner groove. A linking member extends through the outer cap and is connected to the inner cap. A lever is pivotably connected to the linking member so as to drive the linking member which moves the inner cap upward to squeeze the resilient ring to be deformed so as to seal the smooth inner periphery of the opening of the jar.

1 . A sealing unit for a jar comprising:
 an inner cap having a flange extending from a top thereof and having a protrusion extending radially therefrom, an outer groove defined in an outer periphery of the flange beneath the protrusion;   a resilient ring having a bent portion extending radially from an underside thereof and the bent portion engaged with the outer groove, the resilient ring having an L-shaped cross section;   an outer cap having an annular recess defined in an underside thereof and the flange of the inner cap engaged with the annular recess which has room so that the flange is movable within the room, the outer cap having an inner groove defined in an inner wall thereof and the resilient ring engaged with the inner groove, a through hole defined through a center of a top of the outer cap;   a linking member extending through the through hole of the outer cap and connected with a connection portion of the inner cap so as to move the inner cap up and down relative to the outer cap, and   a lever pivotably connected to the linking member and the linking member being driven by the lever to move the inner cap upward, the resilient ring engaged between the inner groove of the outer cap and the inner cap and being adapted to be deformed toward an inner periphery of the jar.   
     
     
         2 . The sealing unit as claimed in  claim 1 , wherein the connection portion protrudes from the top of the inner cap and the outer cap has a positioning portion located at an underside thereof, the connection portion is engaged with the positioning portion. 
     
     
         3 . The sealing unit as claimed in  claim 2 , wherein the linking member has two latches protruding from two sides thereof and the connection portion of the inner cap has two slots with which the latches are engaged. 
     
     
         4 . (canceled) 
     
     
         5 . The sealing unit as claimed in  claim 1 , wherein the outer cap has at least one boss protruding therefrom for positioning engagement with the lever.