| 摘要 |
<p>The pump e.g. counter-current swimming pump (1), has connection couplings (200, 200a, 200b) comprising a spherical ball (210) ending in a cylindrical tubular end-piece (230) for inter-fitting with an end of a fluid flow pipe. An axis (X2, X'2) of the end-piece is inclined relative to an axis of the ball such that the axis of the end-piece pivots in all directions of an angle (alpha) relative to an axis (XX') of a delivery orifice (1b) or a suction orifice of the pump. The angle is varied from less than alpha-max to more than alpha-max in a range of about 30 to 45 degrees. An independent claim is also included for a water flow installation for a swimming pool, comprising a filtration pump or counter-current swimming pump.</p> |
