Grid for a water intake opening, especially the water intake opening of a water jet propelled boat

Claim 1

A GRID FOR PREVENTING SOLID OBJECTS TO PASS IN A WATER INTAKE OPENING COMPRISING, IN COMBINATION, A FIRST SET OF BARS AND A SECOND SET OF BARS ALTERNATINGLY ARRANGED AND TRANSVERSELY SPACED FROM THE BARS OF SAID FIRST SET, SAID BARS BEING MOUNTED ADJACENT ONE OF THE ENDS THEREOF FOR PIVOTAL MOVEMENT ABOUT A COMMON AXIS EXTENDING TRANSVERSE TO THE ELONGATION OF SAID BARS BETWEEN A SERVICE POSITION IN WHICH SAID BARS EXTEND SUBSTANTIALLY IN ONE PLANE AND SUBSTANTIALLY CO-PLANAR TO SAID INTAKE OPENING AND A CLEANING POSITION IN WHICH THE BARS OF SAID FIRST SET ARE TURNED ABOUT THE COMMON AXIS OUT OF SAID PLANE THROUGH A GREATER ANGLE THAN THE BARS OF SAID SECOND SET; OPERATING MEANS MOVABLE BETWEEN TWO END POSITIONS FOR TURNING THE BARS OF SAID TWO SETS BETWEEN SAID POSITIONS THEREOF; AND CONNECTING MEANS CONNECTING SAID BARS TO SAID OPERATING MEANS, SAID CONNECTING MEASN FOR THE BARS OF ONE SET OF BARS INCLUDING LOST MOTION MEANS CONSTRUCTED AND ARRANGED IN SUCH A MANNER SO AS TO TURN DURING MOVEMENT OF SAID OPERATING MEANS BETWEEN SAID TWO END POSITIONS SAID FIRST SET OF BARS THROUGH A GREATER ANGLE THAN THE BARS OF SAID SECOND SET SO THAT THE BARS OF SAID SETS IN SAID CLEANING POSITION WILL BE ANGULARLY DISPLACED FROM EACHH OTHER SO AS TO DISPLACE SOLID OBJECTS WHICH BECAME WEDGED BETWEEN SAID BARS WHILE THE LATTER WERE IN SAID SERVICE POSITION.