Bale latch for extendable/retractable support column
US9719244B2 · kind B2 · utility
4Cited by
49References
22Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 9, 2016 |
| Grant date | Aug 1, 2017 |
| Priority date | — |
| Expiry date | Mar 9, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T403/70
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
An extendable and retractable column which is formed from at least three linked sections or chains. The linked sections include a plurality of individual segments linked end to end. As the linked segments are extended, each of the individual segments of the linked chains engage individual segments of adjacent linked sections to form a column. As the linked sections are retracted, each of the individual segments of the linked sections disengage from the individual segment of the adjacent linked sections and the individual linked sections may be rolled up into a multi-sided form for compact storage.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.