Self-propelled mobile lawn sprinkler

Claim 1

A MOBILE SPRINKLER COMPRISING AN ELONGATED SUPPORTING FRAME INCLUDING A PAIR OF SPACED PARALLEL HORIZONTAL LONGITUDINALLY EXTENDING SIDE FRAME BARS, A SUPPORTING WHEEL ASSEMBLY PIVOTED TO ONE END OF SAID FRAME, A GUIDING MEMBER RIGIDLY CONNECTED TO SAID PIVOTED SUPPORTING WHEEL ASSEMBLY, GROUND-ENGAGING PROPELLING MEANS MOUNTED ON THE FRAME ADJACENT ITS OTHER END, A HYDRAULIC MOTOR MOUNTED ON THE FRAME, MEANS DRIVINGLY CONNECTING SAID MOTOR TO SAID PROPELLING MEANS, A SPRINKLER HEAD MOUNTED ON THE FRAME, A FLUID SUPPLY CONDUIT MOUNTED ON THE FRAME AND CONNECTED TO SAID MOTOR AND SAID SPRINKLER HEAD, A SHUT-OFF VALVE IN SAID FLUID SUPPLY CONDUIT, A BUMPER MEMBER SLIDABLY AND YIELDABLY MOUNTED ON THE FORWARD PORTIONS OF THE FRAME BARS AND BEING ENGAGEABLE WITH AN OBSTACLE IN THE PATH OF MOVEMENT OF THE FRAME, WHEREBY THE BUMPER MEMBER WILL BE MOVED REARWARDLY RELATIVE TO THE FRAME UPON ENGAGING THE OBSTACLE, AND MEANS TO CLOSE SAID SHUT-OFF VALVE RESPONSIVE TO SAID REARWARD MOVEMENT OF THE BUMPER MEMBER.