Lawn sprinkler head

Claim 1

In combination with an impact sprinkler head of the popup type normally retained in a well below the ground for rotation around a spindle and having a nozzle in communication with a source of fluid under pressure through said spindle; a drive arm resiliently pivotally supported on said sprinkler head for movement around a first pivot axis; said drive arm having a first portion normally extending in the path of the fluid exiting from said nozzle and a second portion extending in opposite direction from said first axis; the lower end of said second portion being provided with an abutment member; a second pivot axis disposed in adjoining relationship to said first pivot axis; a first pivot member pivotally supporting for rocking movement around said second pivot axis having forked arm extensions; one of said arm extensions being provided with a stop member normally extending into thE path of said abutment member so that, in response to the relative position of said pivot member said abutment member in one position abuts said stop member and said abutment member in the other position clears said stop member; the improvement comprising; cam means adjustably disposed laterally along the inside of said well; a second pivot member conjointly supported for rocking movement around said second pivot axis; a striker pin attached to said second pivot member for extension radially outwardly towards the insides of said well adapted for intermittent abutment against said cam means upon rotation of said sprinkler head in either direction of rotation; means resiliently operably connecting said first and said second pivot member such that said means will be tensioned upon rocking movement of said second pivot member to cause rocking movement of said first pivot member in a direction opposite from the direction of rocking movement of said second pivot member; to thereby reverse the direction of rotation of said sprinkler head as well as alter the angular degree of rotation.