Mechanism to facilitate raising and lowering hinged end section of deck
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United States of America Patent
Stats
-
Jun 15, 2004
Grant Date -
Oct 31, 2002
app pub date -
Mar 11, 2002
filing date -
Aug 6, 1999
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A mechanism to assist in raising and lowering a hinged deck end section wherein a lifting force is applied to the deck end section by a counterweight mechanism. In the preferred embodiment, the counterweight mechanism operates in conjunction with a conventional, proven spring assist mechanism of the type that has been used in the past on trilevel railway cars. The counterweight mechanism preferably includes a counterweight that is slidable along a vertical track in a location that is readily accessible for visual inspection and maintenance. Nonmetallic wear pads are preferably employed in conjunction with a dry film lubricant to control friction between the counterweight and the track. The mechanism preferably provides a mechanical advantage so that the lifting force applied by the counterweight mechanism exceeds the weight of the counterweight. A roller chain, steel cable, or the like is preferably employed to connect the weight to the deck end section.
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