Washing machine
US4711104A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 9, 1986 |
| Grant date | Dec 8, 1987 |
| Priority date | — |
| Expiry date | Apr 9, 2006 |
Classification
- Technology area (CPC D)Textiles; Paper
- CPC primaryD06F23/04
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
A washing machine includes a washing tub whose peripheral wall is constituted by an upper peripheral wall section and a lower peripheral wall section which is located below the upper peripheral wall section and which is driven to rotate clockwise and counterclockwise. The washing tub receives water and laundry therein. In the case of a small load of laundry, the laundry is caused to flow, and to be washed due mainly to the flow or water caused by the rotation of the lower peripheral wall section. In the case of a large amount of the load of laundry, the laundry can be due to the synergetic action of the frictional forces. In such a washing machine, the inner surface of the lower peripheral wall section is made gradually larger in diameter from its lower portion to its upper portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.