| 摘要 |
PCT No. PCT/FR86/00279 Sec. 371 Date Apr. 6, 1987 Sec. 102(e) Date Apr. 6, 1987 PCT Filed Aug. 5, 1986 PCT Pub. No. WO87/00883 PCT Pub. Date Feb. 12, 1987.An apparatus for filtering debris from a body of liquid, particularly for automatic cleaning of the bottom of a swimming pool. The apparatus includes a housing having a liquid inlet, a liquid outlet, and a filter located between the inlet and outlet. The apparatus is configured such that liquid is expelled from the housing through the outlet in a direction along a line which does not intersect the axis of symmetry of the housing, which tends to provide a force for rotating the housing about its axis of symmetry. A device is further provided for counteracting the rotational force to propel the apparatus substantially rectilinearly. When an obstacle is encountered by the apparatus, such as a wall of the swimming pool, the device for counteracting the rotational force is no longer effective to maintain rectilinear movement. Consequently, the apparatus rotates and then moves rectilinearly away from the obstacle or wall. Repeated movement in this manner is effective to remove debris from the entire bottom surface of the swimming pool or like surface. The apparatus can also be made to float and to thereby clean the upper surface of a body of liquid, particularly the upper surface of a swimming pool. |
