| 摘要 |
A coupling for mine ventilation conduits comprising a first tubular conduit having a flared end portion for receiving an end portion of a second tubular conduit, at least one of the conduits having an elongate flexible strap attached thereto having a length sufficient to reach the other tubular conduit. A resilient compressible strip is placed between said first and second tubular conduits around the periphery of the end position of the second tubular conduit. The coupling also includes a device for tightening the flexible strap length and for holding the strap in a tightened position, the device being secured to one of said conduits and providing for tightening of said strap to draw said tubular conduits together to compress the resilient strip between the flared end portion of the first conduit and the end portion of the second conduit to thereby provide a substantially air tight seal between said conduits.
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