Pull-out diaphragm seal for hollow tubes

Details Pull-out diaphragm seal for hollow tubes Pull-out diaphragm seal for hollow tubes

1981-03-04

1983-03-15

Pollard, Steven M.

Hydraulic and earth engineering

Marine structure or fabrication thereof

405227, 138 89, 220234, E02B 316

Patent

active

043765971

ABSTRACT:
A diaphragm seal assembly for large tubes such as used as supporting legs in offshore platforms and pile drivers in underwater environments, with the diaphragm seal closure constructed to resist loads retained in such manner as to be nearly completely removed by upward tension pull on a pull-out cable. The diaphragm seal assembly is retained between rings welded inside a tubular member by a split ring forced apart to a retaining diameter by a removable key. Pull on a cable removes the key allowing the split ring to return to its initial smaller diameter size small enough to be removed up out of the tube along with the diaphragm closure member.

REFERENCES:
patent: 4058330 (1977-11-01), Wolf
patent: 4142371 (1979-03-01), Mayfield et al.
patent: 4175592 (1979-11-01), Coone
patent: 4215951 (1980-08-01), Knox
patent: 4249576 (1981-02-01), Streich et al.
patent: 4292004 (1981-09-01), Knox

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