Static structures (e.g. – buildings) – Shaped or strengthened by fluid pressure – Fluid pressure is subatmospheric
Patent
1987-07-10
1988-05-24
Murtagh, John E.
Static structures (e.g., buildings)
Shaped or strengthened by fluid pressure
Fluid pressure is subatmospheric
52 11, E04D 1300
Patent
active
047457090
ABSTRACT:
A building drain gutter has a flexible liner disposed in the trough of the gutter and connected in sealed relationship with upper edges of the gutter, the liner being loosely disposed within the trough and conforming to its configuration between the edges. A conduit is connected into the trough and communicates with an air compressor which when activated forces the liner to balloon upwardly out of the trough to remove debris which has accumulated thereon. The liner is a relatively thin plastic film such as vinyl. A downspout connected into the gutter communicates through a hole in the liner which is sealed with the trough about the hole. The liner acts to channel water to the downspout, yet can be lifted by the compressed air when necessary.
REFERENCES:
patent: 2865674 (1958-12-01), Jelmeland
patent: 3157002 (1964-11-01), Herman
Murtagh John E.
Ruderman Alan
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