Piston and valve arrangement
US4579138A · kind A · utility
Inventor
Key dates
| Filing date | Jun 14, 1984 |
| Grant date | Apr 1, 1986 |
| Priority date | — |
| Expiry date | Jun 14, 2004 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/2544
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention relates to a piston for a quick dump valve disposed for filling a space after the evacuating or dumping of that space. The piston is in the form of a plate (21) having a short peripheral flange (22), the external face of which assures only relative guidance by engaging the cylinder with a play sufficiently great as to reserve a passage (3) for the gas supplied via the feed opening sufficient to allow this gas to reach the space and a medial flange (23), the edge of which has a bearing surface the shape of which is complementary to that of the seat (9) with which it cooperates in order to close the discharge passage. The valve is particularly adapted for improving the outflow of products at the outlet of silos.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.