Push pull dispensing closure
US5931350A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 13, 1997 |
| Grant date | Aug 3, 1999 |
| Priority date | — |
| Expiry date | Feb 13, 2017 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/242
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dispensing closure for installation on a bottle finish having a mouth comprises a cap which covers the mouth, and an upwardly bowed diaphragm between the cap and the mouth, normally in contact with the cap. The mouth has a concave frustoconical end surface, and the cap has a circular rib overlying the end surface so that when the cap is pressed downward, it depresses the diaphragm, opening a flow path through an aperture in the cap. In one embodiment of this invention, a sealing interface is formed between the diaphragm and the bottom of the cap, around the aperture, while in another embodiment, a seal is formed around a central aperture in the diaphragm by a protrusion on the bottom surface of the cap.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.