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    • 4. 发明申请
    • Fifth wheel release lever
    • 第五轮释放杆
    • US20050023848A1
    • 2005-02-03
    • US10629752
    • 2003-07-30
    • Dennis Zimmerman
    • Dennis Zimmerman
    • B62D53/08B65G7/12B66F3/00
    • B62D53/0857
    • A second class lever device provides additional mechanical advantage to pull the release handle in the fifth wheel hitch of a truck tractor and semi trailer combination. Such release handles can bind and become difficult to release due to misalignment between tractor and trailer, corrosion or lack of lubrication, etc. The present release lever includes an elongate fulcrum bar to bridge the gap between the tractor tires and the overlying side of the trailer, with a lever arm extending therefrom. A tension member extends from the lever arm, between the handle end and fulcrum end thereof. The lever arm telescopes for storage, with the fulcrum bar pivoting and sliding in its lever arm attachment to further facilitate compact storage. The tension member preferably comprises a chain, with a release handle engaging hook adjustably installed on the chain to adjust the effective length thereof as required.
    • 第二级杠杆装置提供额外的机械优点来拉动卡车拖拉机和半拖车组合的第五轮牵引中的释放手柄。 这种释放手柄可能由于拖拉机和拖车之间的不对准而结合并变得难以释放,腐蚀或缺乏润滑等。本释放杆包括细长的支点杆,以跨越拖拉机轮胎和拖车的上侧之间的间隙 具有从其延伸的杠杆臂。 张力构件从杠杆臂延伸在手柄端和支点之间。 杠杆臂望远镜用于存储,支点杆在其杠杆臂附件中枢转和滑动,以进一步促进紧凑的存储。 张紧构件优选地包括链条,其具有可调节地安装在链条上的释放手柄接合钩,以根据需要调整其有效长度。