Bowl and cover assembly
US4341324A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 9, 1980 |
| Grant date | Jul 27, 1982 |
| Priority date | — |
| Expiry date | Jul 9, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D2543/00851
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A bowl and cover assembly includes a bowl with an annular sealing lip depending radially outwardly from the upper annular rim of the bowl. The sealing lip has an annular top sealing surface and an annular edge sealing surface. The cover has a flared annular skirt about its periphery which defines a down facing mating surface and an infacing mating surface adjacent thereto. When the cover is placed over the sealing lip the top sealing surface seats against the downfacing mating surface and the edge sealing surface seats against the infacing mating surface to form an airtight seal. An annular depression in the interior surface of the bowl extends upward from an upfacing interior shoulder to provides an air bypass region to prevent vacuum locking between adjacent stacked bowls.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.