Helical staircase support

Details Helical staircase support Helical staircase support

1979-10-22

1981-10-27

Friedman, Carl D.

Static structures (e.g., buildings)

Stepped; e.g., stair

Helical type

248282, E04F 1100

Patent

active

042965772

ABSTRACT:
A staircase support for a flying staircase of helical construction requiring attachment to the dwelling only at an upper and lower end thereof is disclosed. The support comprises a bracket including a first vertical tube and a second vertical tube axially spaced from the first tube and a horizontal member which extends from an upper portion of the first tube to a lower portion of the second tube. A plurality of identical brackets are assembled with a first bracket second tube upper end abutting a second bracket first tube lower end. In a preferred embodiment an expandable sleeve slidingly engages the abutting tubes and is expanded to fixedly engage adjacent brackets.

REFERENCES:
patent: 1774582 (1930-09-01), Woodbridge
patent: 2164390 (1939-07-01), Dickerson
patent: 3207259 (1965-09-01), Gebhart
patent: 3213579 (1965-10-01), Neher
patent: 3430729 (1969-03-01), Miceli
patent: 3473275 (1969-10-01), Lappin, Jr.
patent: 3482364 (1969-12-01), Albrektson et al.
patent: 3916591 (1975-11-01), Agterhof et al.
patent: 4125175 (1978-11-01), Ernst

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