专利名称：PET DOOR STRUCTURE发明人：JOHNSON F,US申请号：US3797554D申请日：19720609公开号：US3797554A公开日：19740319
摘要：A pet door structure having an open frame to which is swingingly secured adoor, the upper edge of the frame comprising an elongated element which is caneshaped in cross-section, the free end of the cane shaped element extending toward theinterior of said frame, a first connection means located between the door and the frameadjacent the upper surface of the door permitting such to swing loose in either directionwith respect to the frame, a substantially U-shaped border element attached to theelongated element by a second connecting means, the border element to swing only inone direction along with the door and remain in contact with the frame during swingingmovement of the door in the opposite direction.
申请人：JOHNSON F,US
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容