Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Stair system with expandable center

Inactive Publication Date: 2005-12-29
SORENSON ROBERT E JR
View PDF10 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0011] Another object of the present invention is to reduce the assembling complexity of the system.
[0012] It is yet another object of the p

Problems solved by technology

A major cost portion of any construction project, whether residential, commercial, or industrial, is that of stair construction.
These craftsmen are necessary whether building one stair or multiple stairs of the same design, because of the small variations between floor heights, and floors may lead to a not so perfectly level or square.
Considering various aspects this system is limited in many ways as pivotable blocks make the assembly bulky and costly without added benefit addi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Stair system with expandable center
  • Stair system with expandable center
  • Stair system with expandable center

Examples

Experimental program
Comparison scheme
Effect test

Example

REFERENCE NUMERALS

[0027]20 . . . outer stringer [0028]25 . . . central stringer [0029]31 . . . riser [0030]32 . . . tread [0031]33 . . . corner bend [0032]34 . . . lip [0033]35 . . . bolt hole [0034]36 . . . handrail aperture [0035]37 . . . lap seam [0036]41 . . . handrail post [0037]42 . . . post receptacle [0038]43 . . . bracket [0039]44 . . . handrail system [0040]46 . . . first projecting structure [0041]48 . . . receiving grove [0042]50 . . . second projecting structure

DETAILED DESCRIPTION OF THE DRAWINGS

[0043] A further understanding of the present invention may be obtained with reference to the following description taken in conjunction with the accompanying drawings. However, the embodiments used for describing the invention are illustrative only and no way limiting scope of the invention. A person skilled in the art will appreciate that many more embodiments of the invention are possible without deviating from the basic concept of the invention any such embodiment will f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A staircase assembly comprising a plurality of stringers, and; a plurality of stair units, having treads and risers wherein stair unit is secured by means of fastening means on each corner to said plurality of stringers, said stringers, having a diagonally shaped series of equally spaced substantially vertical structure notched out of one side to define the length and height of each step of the stair assembly. The said tread,-forming a channel by rolling the leading edge for holding the riser of the stair unit installed immediately below, and each stair unit is secured by means of fastening means on each corner to said plurality of stringers, said channels further engaging other stair unit laterally sliding for providing horizontal adjustability.

Description

CROSS REFERENCE TO RELATED APPLICATIONS [0001] This application claims priority from the provisional application No. 60 / 583,203 filed on Jun. 28, 2004. The applicant filed a disclosure document on 12 Sep. 2003; Ser. No. 541,502.STATEMENT REGARDING COPYRIGHTED MATERIAL [0002] Portions of the disclosure of this patent document contain material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure as it appears in the Patent and Trademark Office file or records, but otherwise reserves all copyright rights whatsoever. FIELD OF INVENTION [0003] This invention generally relates to a staircase system, more specifically to an adjustable staircase system and, still more precisely to a staircase system with expandable center that is easily and quickly built, cost effective and is safe to be installed by an average worker. BACKGROUND OF THE INVENTION [0004] A major cost portion of an...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): E04F11/00E04F11/025E04F11/18E04F19/10
CPCE04F11/025E04F11/1041E04F11/1812
Inventor SORENSON, ROBERT E. JR.
Owner SORENSON ROBERT E JR
Features
  • Generate Ideas
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com