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Cap device for mouthpiece of container and methods of sealing mouthpiece portion of container and opening the same

  • US 5,145,083 A
  • Filed: 08/27/1990
  • Issued: 09/08/1992
  • Est. Priority Date: 08/28/1989
  • Status: Expired due to Fees
First Claim
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1. A cap device to be mounted to a mouthpiece of a container, comprising:

  • a connecting portion to be connected to the mouthpiece of the container, said connecting portion being provided with an inner hollow portion;

    a coupling projecting portion formed integrally with said connecting portion and adapted to be connected to an external connection line, said coupling projecting portion being provided with an axial through hole in communication with the inner hollow portion of said connecting portion; and

    a movable valve means disposed in said axial through hole to be axially movable,said movable valve means having a first seal member for sealing one end of the axial through hole of said coupling projecting portion, a second seal member for sealing the other end of the axial through hole and a coil spring disposed between said first and second seal members for outwardly urging said first and second seal members, wherein the first seal member and the second seal member are movable in an inward direction of the axial through hole, respectively, when the first seal member and the second seal member receive an external force larger than a force of the coil spring, respectively.

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