Static structures (e.g. – buildings) – Stepped; e.g. – stair
Patent
1990-06-11
1992-02-18
Chilcot, Jr., Richard E.
Static structures (e.g., buildings)
Stepped; e.g., stair
52179, 52716, 52829, E04F 1100
Patent
active
050882473
ABSTRACT:
A returned tread for use on an open stairway or open portion of a stair way constructed of wood and a return nosing joined on at least one side edge of the tread so as to form an exposed joint on a forward end portion of the assembly. The tread and nosing are fastened or secured together only along a forward end portion which contains at least a portion of the exposed joint. The remainder of the nosing and tread are slidable relative to one another and are joined on a rear end portion by means of an expansion joint. In one embodiment, the expansion joint includes an oval shaped biscuit glued and disposed in a slot formed in a nosing facing edge of the tread which biscuit projects into an elongated slot formed in the nosing for permitting the biscuit to slide along the elongated slot as the tread expands and contracts. In the second embodiment, the biscuit is replaced by a peg glued into a blind hole in the nosing which projects into an elongated slot formed in a nosing facing edge portion of the tread for permitting the peg to slide along the elongated slot as the tread expands and contracts relative to the nosing. The expansion slot of the expansion joint may be formed in either the nosing facing edge of the tread or in the tread opposing edge of the nosing.
REFERENCES:
patent: 4730425 (1988-03-01), Young
Chilcot Jr. Richard E.
Miller Jr. Maurice L.
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