Hopper car outlet gate valve
US6263802A · kind A · utility
2Cited by
12References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 30, 1999 |
| Grant date | Jul 24, 2001 |
| Priority date | — |
| Expiry date | Apr 30, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D90/582
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A pneumatic outlet gate of a railroad hopper car has an valve member mounted for rotation in a discharge tube between open and closed positions. The valve member is an arcuate segment terminating laterally at edge faces. The edge faces are angled such that in the upper half of the discharge tube they always slant downwardly from the surface of the tube, while in the lower half of the discharge tube the edge faces face downwardly. An arrangement of stops and abutments prevents rotation of the valve member to a location where the edge faces could trap lading against the discharge tube. Accordingly, the edge faces are self-emptying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.