Vertical arch shelter

Tent – canopy – umbrella – or cane – Umbrella – Self-opening and closing

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Details

52 86, 135DIG1, A45F 116, E04B 132

Patent

active

RE0300446

ABSTRACT:
A vaulted membrane structure that has a series of substantially curved vertical arches that can be arranged in a modular construction to support a flexible membrane that is attached to the arches and tensioned between them in a formed inward depression to minimize vibration and flutter and to increase its ability to withstand heavy live loads such as snow or pulsating loads created by high winds.
This construction applies particularly to comparative small shelters where the membrane can slide in its fastener on the arch, or slide along the arch to stretch the membrane over the arches when it is fabricated in one piece or in multiple sections.
The membrane is tensioned in several ways: by pulling the membrane towards the base or by pulling the arches apart by anchor lines and/or by end closures that are fastened to the base, or by adjustable purlins or jacks between arches to force them apart. A combination of two ways is also used. The arches are fixed apart by compression members between them or by anchor lines to the base. Tension rings along the base can be used to urge the membrane downward between arches and to provide openings under them for shelter ventilation.
Safety cables between arches are optional but can prevent collapse of the shelter in case of membrane failure.

REFERENCES:
patent: 2615458 (1952-10-01), Jones
patent: 2797696 (1957-07-01), Fritshe
patent: 3215153 (1965-11-01), Huddle
patent: 3240217 (1966-03-01), Bird et al.
patent: 3273574 (1966-09-01), Huddle

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