Towline cart engagement apparatus
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United States of America Patent
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Jul 29, 2008
Grant Date -
N/A
app pub date -
Feb 22, 2007
filing date -
Feb 22, 2007
priority date (Note) -
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status (Latency Note)
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Abstract
The apparatus is a coupling device that couples a cart to a continuously moving towline which is recessed into the cart support surface. A vertically movable coupling pin engages the towline and is lifted away from the towline to disengage the cart from the towline. To prevent irregularities in the support surface from accidentally lifting the pin away from the towline, the pin is attached to the cart through a structure that also permits the cart to move freely relative to the pin but maintain the pin engaged with the towline. The preferred embodiment attaches the coupling pin to a movable tube that moves within a fixed tube, and the movable tube also can be lifted by a cam and locked into a position with the pin disengaged.
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