Foldable frame apparatus
US4140141A · kind A · utility
8Cited by
7References
13Claims
0Family size
Inventor
Key dates
| Filing date | Sep 23, 1977 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Sep 23, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S135/909
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A portable collapsible frame structure for tents, shelters, temporary buildings and the like is disclosed. The frame includes a plurality of elongate, rigid frame members connected by pivotable joints to each other in end-to-end relation such that alternating joints are articulatable in opposite directions to permit folding of the frame members into side-by-side, parallel relation for ease of transportation. The frame structure is held in its erected position by tensile elements which are arranged to apply a compressive force to the abutting ends of the frame members and thereby rigidify the joints of the frame structure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.