| 摘要 |
A bolting arrangement, especially for coke-oven doors in which the ends of a two-armed bolt turnable about a central axis of a bolt support engage under pressure of a pre-stressed compression spring located between said bolt support and the door panel transverse portions of hook-shaped strikes projecting from a frame defining an opening in a coke oven wall covered by the door panel to press the latter against the frame. A fluid operated piston is sandwiched between the end of the spring distant from the door panel to compress, when actuated, the spring to relief thereby the pressure on the bolt support and the bolt carried thereby so that the latter may be easily turned about the axis and disengaged from the strikes.
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