Patent · US Active

Stair modules which co operate to form a temporary stair case

US9499991B2 · kind B2 · utility

5Cited by
22References
21Claims
0Family size

Inventor

Key dates

Filing dateFeb 11, 2014
Grant dateNov 22, 2016
Priority date—
Expiry dateFeb 11, 2034

Classification

  • Technology area (CPC E)Fixed Constructions
  • CPC primaryE04F2011/0218
  • WIPO fieldCivil engineering
  • WIPO sectorOther fields

Abstract

A stair assembly comprising at least two stair modules with each connected to an adjacent module; the stair assembly comprising a first module having first and second side abutments and spanning therebetween a stair tread. There is at least one other abutment surface associated with said first and second side abutments and which provides a bearing surface to receive and retain an adjacent stair module. The second module includes a stair tread which when disposed adjacent the first module is disposed in an us elevated position relative to the stair tread of the first module, wherein the first and second stair module are interconnected via an auxiliary module.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.