초록 ▼

An oscillating wave-type lawn sprinkler is provided of the type having a water-powered drive mechanism for angularly oscillating an elongated spray tube generally about its own axis, wherein the drive mechanism has a crank link coupled to the spray tube by an improved releasable coupling assembly. T

An oscillating wave-type lawn sprinkler is provided of the type having a water-powered drive mechanism for angularly oscillating an elongated spray tube generally about its own axis, wherein the drive mechanism has a crank link coupled to the spray tube by an improved releasable coupling assembly. The releasable coupling assembly comprises a C-shaped clamp at one end of the crank link, sized to fit around the spray tube, an indentation in the spray tube, and at least one tab on the interior surface of the clamp for releasingly engaging the indentation. During normal operation, the tab is engaged in the indentation and the angularly oscillatory motion of the crank link is imparted to the spray tube. When the spray tube is subjected to an external rotational force exceeding a predetermined magnitude, the spray tube rotationally disengages the indentation from the tab to move independently of the crank link, thereby preventing damage to the drive mechanism. Normal engagement of the spray tube with the crank link is restored by manually rotating the spray tube until the indentation returns to alignment with the crank link tab.

대표청구항 ▼

In an oscillating wave lawn sprinkler of the type having a spray tube, a fluid-driven motor, and a drive linkage, which includes a crank link, said linkage being coupled between the motor and the spray tube for transforming rotational motion of the motor into angularly osillatory motion of the spray

In an oscillating wave lawn sprinkler of the type having a spray tube, a fluid-driven motor, and a drive linkage, which includes a crank link, said linkage being coupled between the motor and the spray tube for transforming rotational motion of the motor into angularly osillatory motion of the spray tube, the improvement comprising: a releasable coupling assembly for releasably coupling said drive linkage to said spray tube, said coupling assembly including: an indentation formed on one of said crank link and said spray tube; a tab located on the other of said crank link and said spray tube for engaging said indentation, the one of said indentation and said tab on said spray tube being formed integrally with said spray tube; and means for permitting said spray tube to move relative to said crank link by releasably securing said tab in engagement with said indentation for normal angular oscillatory driving of said spray tube by said crank link, said securing means being disengageable from said indentation or tab whenever said spray tube is subjected to an externally applied rotational force exceeding a predetermined magnitude to permit said spray tube to rotate relate to said crank link and move independently of said drive linkage.