Ships – Hatches and covers – Inflatable gaskets
Patent
1978-05-25
1981-01-27
Kazenski, Edward R.
Ships
Hatches and covers
Inflatable gaskets
114173, 220288, B63B 1912
Patent
active
042468590
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 closure has a centering shoulder which is engaged by the rim of the fitting whereby a self-centering of the closure takes place when it is screwed into the fitting. The loose fit and the sliding engagement of the flat surfaces of the buttress-type threads enable an unimpeded lateral shifting of the closure to occur as determined by the engagement of the centering shoulder on the closure and the rim of the fitting. Accordingly, proper seating of the shoulder on the rim is insured, resulting in a leak-resistant seal being 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: 304684 (1884-09-01), Adams
patent: 1934356 (1933-11-01), Kice
patent: 2146587 (1939-02-01), Merolle
patent: 2818204 (1957-12-01), Henchert et al.
patent: 3022917 (1962-02-01), Montgomery
patent: 3037251 (1962-06-01), Landis
patent: 3432069 (1969-03-01), Craig
patent: 3664540 (1972-05-01), Witkin
patent: 4065026 (1977-12-01), Williams et al.
patent: 4114779 (1978-09-01), Stoll
Douglas Winston H.
Kazenski Edward R.
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