Pick hole guard for manhole covers
US8579541B2 · kind B2 · utility
1Cited by
16References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2011 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Apr 19, 2031 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE02D2200/1628
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Pick hole guards are provided for use in guarding pick holes on manhole covers. In some embodiments of the present invention, the pick hole guards can have a base, biasing member, and guard member. The biasing member can be attached to the base and guard member, and can bias the guard member toward a pick hole on the manhole cover to guard the pick hole. In other embodiments, the pick hole guards do not have movable guard members, but instead have retaining surfaces to serve as a receptacle for catching waste disposed through a pick hole.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.