Spraying apparatus

Claim 1

A BREAKWAY COUPLING ADAPTED TO PIVOTALLY SECURE THE OUTRIGGER BOOM OF A SPRAYING MACHINE TO THE MAIN FRAME THEREOF COMPRISING: A FIRST COUPLING-HALF MOUNTED ON SAID FRAME AND HAVING A PLATE PORTION DISPOSED IN A SUBSTANTIALLY HORIZONTAL PLANE, A SECOND COUPLING-HALF MOUNTED ON SAID OUTRIGGER BOOM HAVING A PLATE PORTION DISPOSED IN A SUBSTANTIALLY HORIZONTAL PLANE, EACH OF SAID COUPLING PLATE PORTIONS HAVING COMPLEMENTARY COOPERATING POSITIONING MEANS FORMED THEREON ADAPTED TO HOLD SAID BOOM ALTERNATELY IN AN OPERATING POSITION EXTENDING LATERALLY OF THE FRAME AND A NON-OPERATING POSITION AT AN ANGLE TO SAID OPERATING POSITION, SAID POSITIONING MEANS INCLUDING A FIRST MEMBER FORMED ON ONE OF SAID PLATE PORTIONS HAVING AN INCLINED SURFACE AND A SECOND MEMBER FORMED ON THE OTHER PLATE PORTION ENGAGEABLE WITH SAID INCLINED SURFACE WHEN THE BOOM IS DISPOSED IN SAID OPERATING POSITION, SPRING MEANS ASSOCIATED WITH SAID PLATE PORTIONS FOR BIASING THE BOOM TO SAID OPERATING POSITION, SAID SPRING MEANS BEING YIELDABLE UPON PIVOTING OF THE BOOM WHEN ENCOUNTERING AN OBSTRUCTION TO ACCOMMODATE MOVEMENT OF SAID SECOND MEMBER OVER THE INCLINED SURFACE OF SAID FIRST MEMBER IN RESPONSE TO PIVOTAL MOVEMENT OF SAID BOOM AND TO AUTOMATICALLY RETURN THE BOOM TO SAID OPERATING POSITION, THE LENGTH OF SAID INCLINED SURFACE BEING SUFFICIENT TO PERMIT THE BOOM TO SWING APPROXIMATELY ONE-HALF THE DISTANCE TO SAID NON-OPERATING POSITION AND AUTOMATICALLY RETURN THE BOOM, IN RESPONSE TO THE BIAS OF SAID SPRING MEANS, TO ITS OPERATING POSITION, AND MEANS IN THE MOUNTING OF SAID FIRST COUPLING HALF ON THE MAIN FRAME FOR ADJUSTING SAID FIRST COUPLING HALF VERTICALLY TO VARY THE DISTANCE BETWEEN SAID BOOM AND THE GROUND WHILE ACCOMMODATING THE PIVOTING OF SAID BOOM.