Appliance for plugging a hole in a boat hull

Details Appliance for plugging a hole in a boat hull Appliance for plugging a hole in a boat hull

1991-12-09

1993-10-19

Mitchell, David M.

Ships

Leak stoppers

114229, B63B 4316

Patent

active

052536025

ABSTRACT:
An appliance for plugging a hole in a boat hull comprises a threaded stem (3), a tubular slide (4) sleeved upon the stem (3), a hub (5) fixed to a distal end of the stem (3), a proximal abutment flange (6) on the slide (4), a distal abutment flange (7) having a converging distal surface on the slide (4), a collar (8) slideable along the slide (4) between the abutment flanges, a plurality of ribs (10), each pivoted at one end to the collar (8) and able to radiate therefrom in the manner of wheel spokes, a like plurality of control arms (11) respectively pivoted at one end to the ribs (10) at a position intermediate the rib ends and pivoted at their other ends to the hub (5), and an impervious membrane (12) secured to the ribs (10) and filling the spaces therebetween when the ribs are radiating from the collar (8). Having been thrust through a hole in a boat hull the slide (4) may be moved outwardly to cause the ribs (10) to swing out and the membrane (12) to cover the hole. Thereafter a cover (19) may be attached to the stem (3) by a combined handle
ut (14) and an bladder (24) inflated to form an effective seal preventing the ingress of water.

REFERENCES:
patent: 1249422 (1917-12-01), Kook
patent: 2220085 (1940-11-01), Dirschel
patent: 2365488 (1944-12-01), Nelson
patent: 2574859 (1951-11-01), Chisholm
patent: 4329132 (1982-05-01), Melvold et al.
patent: 4527500 (1985-07-01), Fuerst
patent: 4951590 (1990-08-01), Kassbaum

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