Foam dispenser
US5033654A · kind A · utility
25Cited by
6References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1990 |
| Grant date | Jul 23, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65D47/32
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A foam dispenser utilizes a deformable reservoir of foamable fluid and air, a discharge device and an arrangement for producing foam which includes a foam overlay or filter. When the dispenser is operated, air from inside the dispenser is mixed with the fluid to produce foam. The dispenser employs a check valve in the form of a ball and cylinder disposed outside of the path of liquid flow for use in controlling the backward flow of air from outside the dispenser into the interior to recharge the air supply within the dispenser for use in subsequent foam dispensing operations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.