Relief vent for pressurized cans
US4003505A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 23, 1975 |
| Grant date | Jan 18, 1977 |
| Priority date | — |
| Expiry date | Dec 23, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB05B15/14
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
An aerosol dispenser can has a cylindrical body and an outwardly-concave bottom divided into an outer annular frusto-spherical part and a central dome like part by a plurality of discrete generally tangential scores spaced apart in circular configuration, the central part having a greater radius of curvature than the outer part. Generally tangential scores may also be spaced around a rolled rim at the edge of the bottom. These scores weaken the resistance of the bottom to outward deformation so that in the case of a certain internal overpressure, the bottom firstly deforms outwardly and one or more scores then gradually rip, without propagation of the ripping, to release the overpressure. The neighboring ends of adjacent scores may be arranged out of alignment with one another to prevent propagation of ripping from one score to the next.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.