Patent · US Expired

Self-closing dispenser

US4519530A · kind A · utility

25Cited by
3References
6Claims
0Family size

Inventor

Key dates

Filing dateFeb 25, 1983
Grant dateMay 28, 1985
Priority date—
Expiry dateFeb 25, 2003

Classification

  • Technology area (CPC B)Performing Operations; Transporting
  • CPC primaryB65D47/2068
  • WIPO fieldHandling
  • WIPO sectorMechanical engineering

Abstract

A self-closing dispenser device having a generally rigid valve support with a two-way passageway for dispensing in one direction and return air flow in the other direction, a diaphragm on one side of the valve support, a valve member on the other side of the valve support, porting in the diaphragm, a valve stem connected to the diaphragm member and extending through the two-way passageway, and having a valve closure surface and a dispensing opening in the valve member, normally closed by the valve closure surface and movable outwardly for ejection of material, and the valve stem and closure surface being movable inwardly away to permit re-entry of air.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.