Concave-convex structure with spaced fittings for intersecting f

Details Concave-convex structure with spaced fittings for intersecting f Concave-convex structure with spaced fittings for intersecting f

1976-09-30

1978-07-11

Schroeder, Werner H.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

24 73PF, 24DIG17, 135 15CF, 135 8, A45F 116

Patent

active

040995330

ABSTRACT:
A concave-convex structure is composed of a plurality of pole or rod elements including at least two series of rows of such rods, the rods of each row being substantially parallel to one another. The rows are intersecting, but are uniform in respective orientation. The rods are stabilized at the intersections by fittings which permit relative sliding movement of restricted degree. These fittings are secured to a flexible membrane or body portion.
Modification of the fittings to provide multiple layer body portions is achieved through the application of spaced layers of material.

REFERENCES:
patent: 1880845 (1932-10-01), Czop
patent: 2186535 (1940-01-01), MacGeorge
patent: 2364266 (1944-12-01), Bryce
patent: 2548004 (1951-04-01), Duefrene
patent: 3498305 (1970-03-01), Hulin
The North Face Catalog, p. 31, 1975.

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