Tight vial assembly with one-piece cap

US4444327A · kind A · utility

Inventor

• Peter Hedgewick · Windsor, CA

Key dates

• Filing date: Mar 11, 1983
• Grant date: Apr 24, 1984
• Expiry date: Mar 11, 2003

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B65D41/06
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A safety container and closure assembly including an integrally-molded, one-piece plastic cap having a sealing portion which provides an "oil-can" effect during axial and rotative motion of the cap relative to the container. The sealing portion comprises a relatively thin, radially outwardly curved wall which is integrally joined to a relatively stiff annular base portion from which a peripheral skirt portion axially projects for receiving the mouth of the container. Integrally formed with the sealing portion is a relatively thin, annular biasing portion which, in turn, is integrally formed with a relatively stiff, inner, disc-like base portion. The biasing portion biases the sealing portion to axially spaced positions such that when the cap is placed on the container, the biasing portion biases the cap in a fixed axial sealing position relative to the container and simultaneously applies pressure to the sealing portion. Preferably, a rib comprising an O-ring seal projects inwardly on the inner surface of the mouth portion of a container and simultaneously engages the sealing portion during the axial and rotative motion of the cap relative to the container.