B - Operations – Transporting – 63 – B
Patent
B - Operations, Transporting
63
B
114/29, 190/15.0
B63B 19/14 (2006.01) B65D 45/10 (2006.01)
Patent
CA 1076497
HATCH COVER ABSTRACT OF THE DISCLOSURE A hatch cover for closing and sealing a hatch open- ing has radial latching arms connected at their inner ends to a rotatable arm-actuating hub on the bottom side of the cover at ball-and-socket connections and loosely connected to the cover near their outer ends, In one rotational position of the hub the arms overlap and apply clamping pressure to the rim of the hatch opening and in a second rotational position of the hub the arm-clamping pressure is released and the arms are retracted from the rim to enable removal of the cover from the opening. The hub rides on camming surfaces of the cover which are shaped so that as the hub rotates in a hatch- closing direction, the arms first extend over the rim of the opening and then pivot into clamping engagement with the rim about their loose connections to the cover, urging the cover through such connections into tight seated engagement with the rim, A resilient sealing ring with double lips and car- ried by the cover engages the rim when the cover is seated to seal the hatch opening. A shaft extending through the cover and axially slidable and rotatable relative to it and the hub can be selectively engaged with the hub to rotate it. A handle fixed to the upper end of the shaft is used to engage and disengage the shaft and hub and to rotate the hub to acti- vate the arms, The top surface of the cover is recessed to receive and store the handle flush with the cover surface when not in use.
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