Dishwashing apparatus
US4559959A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 18, 1982 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Oct 18, 2002 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA47L2501/30
- WIPO fieldFurniture, games
- WIPO sectorOther fields
Abstract
A multiple-fill dishwasher and method includes a wash chamber having a sump at the bottom thereof, a remotely controlled inlet valve for supplying cleansing liquid into the sump, a drain for draining liquid and entrained soil from the sump, and a recirculating pump having a spraying system receiving the output thereof for spraying liquid onto soiled ware contained within the chamber. A control circuit controls the valve, drain means, and pump to perform a selected one of a plurality of different cleansing cycles which are automatically selected according to the extent of soil on the ware. An operator-actuated switch for commencing operating of the control circuit, and a chamber for collecting soil particles in a concentrated fashion during liquid recirculation, are also provided. The improvement comprises a sensor responsive to a predetermined particulate soil concentration in the soil collection chamber, the sensor being operable during liquid recirculation to cause the control circuit to select either a cycle designed to wash heavily soiled ware, or a cycle designed to wash lightly soiled ware.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.