Cover height adjuster
US5360131A · kind A · utility
38Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 1, 1993 |
| Grant date | Nov 1, 1994 |
| Priority date | — |
| Expiry date | Mar 1, 2013 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A cover height adjuster which can be used for a boundary box, a manhole cover, etc. in a paved location having two rings with interengaging sloping castellated end surfaces extending around the peripheries of at least three sectors of the rings and can vary the height of the upper ring upon its rotation over the lower ring. The upper surface of the upper ring may have a slope which engages a sloping surface of a cover assembly, so that relative rotation can also vary the slope of the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.