Filter-separator pour-out cap
US4880140A · kind A · utility
Inventors
Key dates
| Filing date | Apr 26, 1988 |
| Grant date | Nov 14, 1989 |
| Priority date | — |
| Expiry date | Apr 26, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/04
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A filter-separator pour-out cap for attachment to the neck opening of a container to separate particulate material from a liquidic suspension in the container when the container is tipped to pour out its contents. The cap comprises a filter-separator section having an upstream face at which flow from the container enters and a downstream face at which flow exits. This section comprises successive elements that are spaced axially apart from each other and are constructed and arranged to present at the upstream face juxtaposed uniformally spaced apart edges that define the entrances of openings that pass through the filter-separator from the upstream face to the downstream face. These elements have, in transverse cross section, a taper which narrows in the direction from the upstream face to the downstream face so that the openings are of progressively increasing taper in the same direction. In one embodiment of the invention these elements are identical circular rings. In another, the elements are convolutions of a helix. Various embodiments of caps are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.