Self-closing closure utilizing a single diaphragm
US4141474A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1976 |
| Grant date | Feb 27, 1979 |
| Priority date | — |
| Expiry date | Jul 9, 1996 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/2081
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A self-closing closure for a tube or package having a resilient wall for dispensing flowable material upon the application of pressure on the tube, utilizing a relatively stiff spider for supporting an outwardly extending valve stem having a closed outer surface and a diaphragm member having its periphery interconnected with the periphery of the spider to form a closure unit and its inner portion forming a valve with the valve stem. The diaphragm member is formed with a relatively thick flange substantially parallel with the walls of the tube for interconnection therewith, a relatively thin, resilient planar portion extending inwardly toward the stem, and a substantially tubular portion surrounding the stem and terminating in an open lip which makes a close, sliding fit with the outer surface of the stem. The resilient, planar portion of the diaphragm member is normally concave, being formed with an unstressed negative angle of substantially 5.degree. to 15.degree. with a plane perpendicular to the longitudinal axis of the tube. When assembled with the spider, the stem interacts with the lip of the tubular portion of the diaphragm member to reduce the negative angle by about 2.degr…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.