| 摘要 |
A covered hopper car having a removable and releasably lockable hinged roof pivotally connected to the top of the car body and provided with releasable hinges on each side of the upper car body and each side of the roof for pivotally connecting by pivot pins each side of the car roof with each side of the car body wherein releasable locks are mounted on each of the car body sides and releasably connecting with a respective roof hinge and the car body hinges being tied to the roof hinges by tension rods whereupon tipping of the car toward an upside down position for dumping, results in releasing of one side of the roof from its respective car side while the other roof side remains pivotally connected to the other car body side to permit dumping of the contents through the open top of the car.
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