Manway gasket
US8656840B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2012 |
| Grant date | Feb 25, 2014 |
| Priority date | — |
| Expiry date | Mar 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB61D5/08
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A gasket for a railroad car manway nozzle and cover includes an inner leg portion and an outer leg portion joined by a generally planar annular body portion defining an upper annular cover sealing surface and a lower annular nozzle body sealing surface. Concentric annular chevrons are formed on the upper and lower annular sealing surfaces. In one form, the chevrons have a uniform height relative to the upper and lower sealing surfaces. In a modified form, the height of the chevrons varies relative to the surfaces from the which they extend. The height of the chevrons is a minimum where the gasket is radially aligned with cover clamping bolts and a maximum at radial locations midway between clamping bolts. A tab depending from the outer leg portion provides visual verification of the presence of the gasket.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.