Laminated arch members and method of constructing them

Details Laminated arch members and method of constructing them Laminated arch members and method of constructing them

1976-02-23

1978-06-06

Schroeder, Werner H.

Tent, canopy, umbrella, or cane

Umbrella

Self-opening and closing

29155R, 29449, 52 63, 52642, 52731, 52745, 135DIG1, 135 15CF, A45F 116

Patent

active

040929922

ABSTRACT:
Large hollow curved beams and arches are inexpensively produced by curving individual shallow components, such as channels, that are then tiered to form a large laminated member. Smaller beams or arches can be made by tiering the components, curving them all at one time, then fastening them together. Individual layers of curved components are usually fastened together consecutively or in multiple laminations to construct a member with a much higher moment of inertia than the sum of the moments of inertia of the layers in a non-fastened state.

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patent: 3415260 (1968-12-01), Hall
patent: 3469587 (1969-09-01), Folkes
patent: 3811454 (1974-05-01), Huddle
patent: 3909994 (1975-10-01), Richter
patent: 3953955 (1976-05-01), Huddle
patent: 3995081 (1976-11-01), Fant et al.

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