Constructional units for stepped structures

Details Constructional units for stepped structures Constructional units for stepped structures

1975-08-14

1976-09-07

Purser, Ernest R.

Static structures (e.g., buildings)

Stepped; e.g., stair

Tread unit on horizontal tread member connected to riser

52183, 52190, E04F 1100

Patent

active

039786285

ABSTRACT:
A constructional element has an L-shaped body of molded metal or synthetic plastics material. The two arms of the body are provided with inclined stepped surfaces so that two adjacent elements can be locked together in one of a number of different relative positions. In this way a plurality of the elements can be used to build-up a staircase or variable height and extent.

REFERENCES:
patent: 1385209 (1921-07-01), Hall
patent: 1660392 (1928-02-01), Norberg
patent: 1713582 (1929-05-01), Wilson
patent: 3470664 (1969-10-01), Whitehead
patent: 3608256 (1971-09-01), Jeffery's
patent: 3744198 (1973-07-01), Boalssy
patent: 3755981 (1973-09-01), West
patent: 3789556 (1974-02-01), Skinner
patent: 3897665 (1975-08-01), Yokomori

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