Operating nut for fire hydrant
US4633896A · kind A · utility
29Cited by
7References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 28, 1986 |
| Grant date | Jan 6, 1987 |
| Priority date | — |
| Expiry date | Feb 28, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/9247
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
An operating nut construction for a fire hydrant including a body member having a lower tapped portion for threadably receiving a fire hydrant valve rod, a sleeve rotatably mounted on the body member against axial movement, a cap rotatably mounted on the body member against axial movement, a narrow gap between the sleeve and the cap, and a plurality of shallow depressions in the body member aligned with the gap for reception of a specialized wrench having narrow shoulders thereon to turn the body member. The rotation of the sleeve or the cap or both will not turn the body member because they are rotatably mounted thereon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.