Ships – Ports – Stoppers
Patent
1979-09-06
1981-07-28
Blix, Trygve M.
Ships
Ports
Stoppers
114173, 114201R, 215329, 220288, B63B 1900
Patent
active
042804345
ABSTRACT:
A threaded access cover plate construction for boat decks, comprising a threaded fitting which is adapted to be secured to the deck, and a screw closure receivable in the fitting. Both the fitting and the closure have cooperable buttress-type threads which are dimensioned such that there is a relatively loose fit between the two parts. The rim of the fitting is in the form of a resilient upstanding skirt constituted of deformable material, the skirt being capable of yielding at selected points, due to its engagement by a centering shoulder of the closure. The yielding of the skirt permits improved seating of the closure, by minimizing the effect of interference between high points at the regions of contact of the two parts. Accordingly, a highly leak-resistant seal is established, even when the fitting or the closure has become slightly warped, or the fitting has been stressed to some extent by virtue of its being secured to the deck.
REFERENCES:
patent: 999688 (1911-08-01), Winton
patent: 1934356 (1933-11-01), Rice
patent: 2131762 (1938-10-01), Smith
patent: 2146587 (1939-02-01), Merolle
patent: 2818204 (1957-12-01), Henchert
patent: 3022917 (1962-02-01), Montgomery
patent: 3223269 (1965-12-01), Williams
patent: 3432069 (1969-03-01), Craig
patent: 4065026 (1977-12-01), Williams
Blix Trygve M.
Keen D. W.
Lehmann H. Gibner
Lehmann K. Gibner
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