Leak-proof cup assembly with flow control element
US6050445A · kind A · utility
78Cited by
48References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1998 |
| Grant date | Apr 18, 2000 |
| Priority date | — |
| Expiry date | Feb 6, 2018 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D51/165
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A drinking cup assembly including a cup having an open end; a cap adapted to enclose the open end, the cap including a drinking spout and an air vent and mating surfaces adjacent or incorporated into the drinking spout and the air vent; and a flow control valve including two stacks adapted to engage the mating surfaces, each of the two stacks having a concave valve face at a top portion thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.