专利名称：Pet door
发明人：Robert Taylor,David Smith申请号：US07/692256申请日：19910426公开号：US05117890A公开日：19920602
摘要：In general, existing pet doors are unnecessarily complicated and consequentlyexpensive to produce and/or install. The pet door of the present invention overcomesthese problems and provides a readily visible indication of whether a pet is inside oroutside a house. The pet door disclosed herein includes a pair of simple rectangularframes carrying a flexible flap with a weighted bottom end for overhanging inner andouter ledges on the bottom ends of the frames, inside or outside of the frames
depending upon the location of the pet, i.e. a pet moving through the door will push theflap through the frames, the weight returning the flap to a closed position in the frameswith the weight against one bottom ledge.
申请人：TAYLOR; ROBERT,SMITH; DAVID
代理机构：Shlesinger, Arkwright & Garvey
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