发明名称 VERTICALLY ADJUSTABLE TRAILER HITCH
摘要 A vertically adjustable trailer hitch of the type mounted upon a trailer tongue and attachable to a towing vehicle, particularly including a ball socket arm and a parallelogram linkage interconnecting the ball socket arm and a pivotable front wheel. The parallelogram linkage enables a level ride of the trailer tongue upon the pivotable front wheel, regardless of the vertical position of the towing vehicle or hitch itself, also the hitch may be vertically extended for manual handling of the trailer apart from the towing vehicle.
申请公布号 US3679233(A) 申请公布日期 1972.07.25
申请号 USD3679233 申请日期 1971.03.10
申请人 CALVIN LEE BAKER;CLARENCE H. ROGERS 发明人 CALVIN LEE BAKER;CLARENCE H. ROGERS
分类号 B60D1/46;B60D1/66;B60S9/18;B62D53/08;B62D63/06;(IPC1-7):B60D1/00;B60P3/22 主分类号 B60D1/46
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