Cleaning apparatus for submerged surfaces
US4351077A · kind A · utility
Inventor
Key dates
| Filing date | Dec 18, 1980 |
| Grant date | Sep 28, 1982 |
| Priority date | — |
| Expiry date | Dec 18, 2000 |
Classification
- Technology area (CPC E)Fixed Constructions
- CPC primaryE04H4/1663
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
Cleaning apparatus of the type including a cleaning head for cleaning submerged surfaces and a flapper valve for moving the head relative to the surface by oscillation thereof. An annular flexible disc located at the inlet end of the suction head surrounds a central opening below the flexible disc and at least one transverse inlet opening to the passage through the suction head is located above and adjacent the flexible disc. The transverse inlet opening is substantially symmetrical about the direction of movement of the head and faces in the general direction towards which the head moves in operation. An upper member held in spaced relation relative to the disc may be provided to define a flow path between it and the disc towards the transverse inlet opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.