Anti-twist rod section and method of using the same in survey monument placement
US4625473A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 1985 |
| Grant date | Dec 2, 1986 |
| Priority date | — |
| Expiry date | Feb 22, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01C15/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An anti-twist rod section (10) is disclosed which adapts a survey monument (38) at once to resist rotation and to conveniently accept hardware designed to engage cylindrical rods. The method of using the anti-twist rod section (10) in placing a survey monument (38) is also disclosed. The anti-twist rod section includes an elongated body (12) which may have at least one surface channel (18). At least one fin (20) joined to the body (20) at a junction (22) preferably within the channel (18). The junction (22) is adapted to allow the anti-twist rod section (10) to be driven into the ground with the fins (20) in place such that a portion of the fin (20) resists rotation of the anti-twist section. The junction (22) is also adapted to allow the fins (20) to be severed from the body (12) as they are bent tangentially away from the body (12) such that the anti-twist rod section (10) is left unimpeded by fins. The body of the anti-twist rod section (10) may then accept hardware designed to engage cylindrical rods. The anti-twist rod section (10) is commonly employed as an upper section in a survey monument (38) where, after having been driven into the ground, it can resist tampering and can…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.