Cam lever assembly for manhole center
US6595716B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2000 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Sep 15, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D90/10
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A sealable manhole system having a weld ring, a cover with a gasket shaped to engage the weld ring, and a cam lever assembly. The cam lever assembly comprising includes a cam lever having a cam surface and a pivot aperture. A pivot pin is sized to engage the pivot aperture and has a screw aperture formed there through. A connector operatively attached to the weld ring and an adjustment screw passes through the screw aperture and engages the connector. The cover further includes a gasket channel with a neck and an internal shoulder formed above the neck. The internal shoulder further has a dimension wider than the neck and is oriented at an angle to the neck.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.