Self-closing closures

US3952926A · kind A · utility

Inventor

• Billy Nilson

Key dates

• Filing date: Dec 14, 1973
• Grant date: Apr 27, 1976
• Expiry date: Dec 14, 1993

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D47/2081
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A self-closing structure has a tube having a free end surrounded by a funnel shaped end of a cylinder supported on a diaphragm capable of being mounted on the open top of an elastically yielding container and upon compressing said container forcing the contents thereof against said diaphragm the funnel shaped end moves along said tube allowing said content to be extruded and upon the release of the container said funnel shaped end returns below said tube free end and is closed thereby. The release of the container due to its elastically creates a suction thereof drawing air down said tube into said container. A valve can be mounted below said tube normally closing the same, but being opened only for the suction in said container.