Extendable support
US5067589A · kind A · utility
19Cited by
5References
7Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jul 31, 1990 |
| Grant date | Nov 26, 1991 |
| Priority date | — |
| Expiry date | Jul 31, 2010 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04G2001/157
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A support having two support sections slidably engaged with each other includes a lock that can be used to releasably fix the size of the support surface defined by the support sections. The lock is mounted to one of the support sections and includes a shaft that can be received by any of the series of openings defined by the remaining support section. When the shaft is located within an opening, the positions of the support sections relative to each other are fixed, and the support surface will remain stable during use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.