|국가/구분||United States(US) Patent 등록|
|미국특허분류(USC)||220/023.83 ; 220/004.12 ; 220/023.87 ; 220/023.91|
|발명자 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 13 인용 특허 : 5|
Spiral slopes are formed at regular intervals in the circumferential direction on the end face of an opening portion of the outer container. In the inner container, spiral slopes which conform to the spiral slopes are formed at regular intervals in the circumferential direction on the end face of a thick portion of a center portion of the barrel portion, thereby allowing the containers to be relatively moved in an easy manner.
[ What is claimed is:] [1.]1. A vacuum airtight container wherein a cylindrical inner container having a bottom portion provided with a second check valve which can discharge air to an outside only is slidably inserted into an inner cylindrical portion of a cylindrical outer container having a bottom portion provided with a first check valve which can discharge air to the outside only, in a hermetic condition, via a sealing member which is slidably contactable, andsaid inner container is hermetically sealed by attaching a cover member to a cylindrical up...