Suction-operated automatic swimming pool cleaner
US4761848A · kind A · utility
40Cited by
6References
6Claims
0Family size
Inventor
Key dates
| Filing date | Jul 17, 1987 |
| Grant date | Aug 9, 1988 |
| Priority date | — |
| Expiry date | Jul 17, 2007 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H4/1663
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A suction-operated swimming pool cleaner includes a valve in the outlet for venting applied suction upon contact of the pool cleaner with an obstruction to movement. Venting of applied suction reduces suction adherence of the head to the pool surface and permits reorientation of the cleaner to be free of the obstruction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.