专利名称：Expandable house trailer structure发明人：Karl Walter Greiner申请号：US05/733984申请日：19761020公开号：US04114942A公开日：19780919
摘要：A shell structure is pivoted outwardly of a house trailer to enlarge the floorarea. The shell structure can include three sides positioned over a cabin or portion of acabin, and the shell structure is pivotal about a horizontal axis near the level of the floorof the cabin which is mounted on the trailer frame. When pivoted outwardly, a foldingslidable or extensible roof can be positioned on the upper edges of the shell structure.
申请人：GREINER; KARL WALTER
代理人：Edwin E. Greigg
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