Moveable stair apparatus

Details Moveable stair apparatus Moveable stair apparatus

1986-02-10

1987-02-17

Murtagh, John E.

Static structures (e.g., buildings)

Stepped; e.g., stair

Interconnected relatively movable components

52185, 182186, E04F 1104, E06C 910

Patent

active

046429530

ABSTRACT:
A moveable stair apparatus 10 is described for allowing access from a lower floor 103 to a loft or upper floor 101 in a building or between the upper floors 101 and 102 in the building. The moveable stair apparatus includes a plurality of equally spaced apart moveable steps 12 mounted on a girder assembly 11 with a plurality of vertically extending posts 15 mounted to the steps and also a pair of parallel hand rails 16 mounted to the posts. A first pivot pin 18 is secured to the girder assembly to allow pivotable movement of the moveable stair apparatus to a lower floor 103 in a stairway position or to a second floor 102 in a catwalk position.

REFERENCES:
patent: 309951 (1884-12-01), Hoffman
patent: 479436 (1892-07-01), Lummus
patent: 517335 (1894-03-01), Elieson
patent: 867092 (1907-09-01), Ashford
patent: 1166141 (1915-12-01), Merrettig
patent: 1455928 (1923-05-01), Morrill
patent: 2220155 (1940-11-01), Jachim
patent: 2542923 (1951-03-01), Hallen
patent: 3731761 (1973-05-01), Glenn
patent: 4115887 (1978-04-01), Ewards

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