Stair tread support

Details Stair tread support Stair tread support

1987-09-14

1988-12-20

Murtagh, John E.

Static structures (e.g., buildings)

Stepped; e.g., stair

Helical type

E04F 1100

Patent

active

047917644

ABSTRACT:
A spiral staircase having a central wooden center column which includes slots spirally located around the center column. Each of the slots includes a steel support bracket which consists of a base plate and a pair of support arms extending from the base plate. Each of the support arms includes a pair of support pins extending from opposite faces of the support arms. Each of the stair treads and risers are provided with a steel pin engaging hook assembly which is attached to the inner end of the tread riser. The engaging member is provided with four downwardly disposed hook members each of which engages one of the pins mounted on the support arms. The stair treads and risers are supported in cantilever fashion by means of the hooks engaging the respective pins.

REFERENCES:
patent: 485449 (1892-11-01), Boreman
patent: 595064 (1897-12-01), Herbst
patent: 768295 (1904-08-01), Palfrey
patent: 977609 (1910-12-01), Freeman
patent: 1216214 (1917-02-01), Connell
patent: 1361918 (1920-12-01), Smith
patent: 2622834 (1952-12-01), Sparring
patent: 3349414 (1967-10-01), Gutner

Affiliated with

Also associated with

Rating

Stair tread support does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Stair tread support, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stair tread support will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1903210