A hand-powered watercraft comprising: a watercraft body comprising a hatch opening 2 having a peripheral rim 3, a hatch lid 4, and an O-ring 7, having a ring length and a cross-section, the cross-section being deformable and incompressible. The hatch lid is configured to close the hatch opening. In a first option, the O-ring is positioned around an engaging portion (10, Fig 4A) of the rim on an outer surface of the rim. The hatch lid further comprises a lip (12, Fig 4A) extending radially inward from an inner surface of a portion of a peripheral lid wall 6. In a second option, the O-ring is positioned around an engaging portion (Fig 4A) of the lid on an outer surface of the lid wall. The peripheral rim further comprises a lip extending radially inward from an inner surface of a portion of the rim that the O-ring must pass to reach the engaging portion of the rim when the lid is moved to the closed position, the lip forming an inner lip perimeter of the rim. The inner lip extends radially inwards by at least 5% of a rest diameter of the O-ring.
Hand-powered watercraft
2023-04-05
Patent
Electronic Resource
English
IPC: | B63B Schiffe oder sonstige Wasserfahrzeuge , SHIPS OR OTHER WATERBORNE VESSELS |