Static structures (e.g. – buildings) – Shaped or strengthened by fluid pressure – Fluid pressure is subatmospheric
Patent
1979-09-17
1981-06-09
Bell, J. Karl
Static structures (e.g., buildings)
Shaped or strengthened by fluid pressure
Fluid pressure is subatmospheric
135 3R, E04B 1345
Patent
active
042716420
ABSTRACT:
A lightweight tent for backpackers and like uses and characterized by a generally rectangular floor panel and a double layered canopy, the inner membrane of the canopy being breathable and the outer membrane being waterproof, these membranes being connected to opposite sides of the tunnel surrounding three sides of the floor and extended as an arch over the fourth side of the floor. The tunnel houses an inflatable tube which tends to straighten when inflated and this results in both membranes of the canopy being stretched in spaced relation to define an occupancy space having its greatest height dimension at said arch where a zippered closure flap permits access to the occupancy space.
REFERENCES:
patent: 1827486 (1931-10-01), Poulsen
patent: 3058127 (1962-10-01), Hassold
patent: 3338001 (1967-08-01), Fraser
patent: 3534750 (1970-10-01), Kolozsvary
patent: 3899853 (1975-08-01), Wertman
patent: 3970096 (1976-07-01), Nicolai
patent: 3999333 (1976-12-01), Amarantos
patent: 4031674 (1977-06-01), Rand
patent: 4109424 (1978-08-01), Block
patent: 4197681 (1980-04-01), Holcombe
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