Pressure-operated container for viscous products
US4023717A · kind A · utility
13Cited by
8References
37Claims
0Family size
Inventor
Key dates
| Filing date | Sep 24, 1975 |
| Grant date | May 17, 1977 |
| Priority date | — |
| Expiry date | Sep 24, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D83/64
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
The invention contemplates a pressurized container for viscous foods or other viscous products in which the body of the piston includes an axially intermediate flexible circumferential band which lightly contacts or is expandable in the presence of loading pressure exerted by propellant gas. The band thus develops light sealing contact with the interior wall surface of the container, and such contact effectively isolates unexpelled product from the gas-pressure side of the piston, regardless of the extent to which product has been expelled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.