Rinse water additive dispenser
US5768918A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 7, 1997 |
| Grant date | Jun 23, 1998 |
| Priority date | — |
| Expiry date | Apr 7, 2017 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F39/024
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
An improved rinse water additive dispenser for an automatic washer has a substantially rigid body having a resilient portion and an internal volume. The dispenser further includes an opening therein and a valve for sealing the opening closed so that the rinse water additive is maintained within the dispenser until the valve is acted upon by centrifugal force applied to the dispenser during a spin cycle of the automatic washer to unseat the valve. The resilient portion provides for volumetric expansion and contraction of the dispenser when the dispenser is placed in variable temperature water. The volumetric expansion and contraction substantially relieves an air pressure differential between ambient and the internal volume so that the centrifugal force unseats the valve without interference from the pressure differential. The opening may be in the resilient portion or in the substantially rigid body.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.