| 摘要 |
ABTRACT " This invention relates to a expanding doorway that allows for the passage of items or animals through it. The doorway resets in an unexpanded state. By pushing on the expandable membrane the object t or animal can pass through the door thus being on the other side of a solid structure. Once through the doorway way the membrane returns to it's unexpanded condition, thus, sealing the doorway by virtu of its elasticity until used again. The door way is useful as it weather out. other animals not familiar with the doorway will also be kept from passing through the doorway (from the outside to inside).
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