Vented product pump and air filter arrangement
US4889452A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 28, 1989 |
| Grant date | Dec 26, 1989 |
| Priority date | — |
| Expiry date | Feb 28, 2009 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/66
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An apparatus for handling communited materials including a material hopper defining a zone into which the material may be deposited, a filter device having an inlet communicating with the material depositing zone, a pump defining a chamber for receiving material from the hopper, a valve for controlling the supply of material from the hopper to the pump chamber, a device for injecting fluid under pressure into the pump chamber to flush material disposed therein through a pump outlet, a valve for controlling the supply of fluid into the pump chamber, a venting conduit intercommunicating the pump chamber and the inlet of the filter device, and a valve for controlling the flow of fluid through the venting conduit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.