Break-away coupling for highway or roadside appurtenances with enhanced fatigue properties
US11555281B2 · kind B2 · utility
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10References
20Claims
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Key dates
| Filing date | Aug 28, 2015 |
| Grant date | Jan 17, 2023 |
| Priority date | — |
| Expiry date | Apr 29, 2038 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE01F9/635
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A break-away coupling is formed of metal and has a central axis and a necked-down central region formed by two inverted truncated cones each having larger and smaller bases. The cones are joined at the smaller bases by a narrowed transition region having an exterior surface formed by a curved surface of revolution having an inflection point of minimum diameter substantially midway of the coupling along the axis. The cones each define an angle θ1 and θ2, respectively, at each of the larger bases, wherein both θ1 and θ2 are selected to be within the range of 20°-40° and, preferably within the range of 30°-37°.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.