Rotary rake for a hay making machine

A hay making machine comprising:

• a closed gyro housing rotatable about a vertical axis;
• a plurality of angularly offset brackets rotatably fixed on said gyro housing, each of said brackets extending along a respective horizontal bracket axis and being formed with a respective pair of apertures spaced axially from each other along the respective horizontal bracket axis;
• a plurality of journal bearings, each of the journal bearings received in the respective pair of apertures of the respective bracket and being axially fixed thereon;
• a plurality of prong arms each received in the respective journal bearing and extending along the respective horizontal bracket axis and formed with a respective plurality of prongs on a respective outer end of the arm;
• a plurality of cam rollers in said gyro housing and rotatable therewith along a cam path, each of the cam rollers being operatively connected with the respective bracket and centered on a respective horizontal cam axis angularly offset with respect to the horizontal axis of the respective bracket;
• and
• cam means in said gyro housing cooperating with said cam rollers for pivoting each of said prong arms between respective rake and swath formation positions upon displacing said rollers along said cam path.