Rotatable shade umbrella

For a tiltable shade umbrella comprising an umbrella portion;

• an upper shaft supporting the umbrella portion;
• a middle shaft pivotally secured to the upper shaft above a horizontal axis;
• means for locking the upper and middle shafts selectively into a linear configuration and into an angular configuration;
• the improvement which comprises a lower shaft selectively rotatably, slidably, releasably mounted to the middle shaft, one within the other;
• a cam button resiliently secured to the innermost shaft of the lower and middle shafts, so as to protrude radially beyond the circumferential surface of the innermost shaft adjacent a first end thereof, and through one of a plurality of openings arranged circumferentially around the outermost shaft adjacent a first outer end thereof;
• the cam button being shaped to permit slidably interconnecting the middle and lower shafts by inserting the inner first end into the outer first end and sliding the outer shaft over the cam button until the cam button seats through one of the plurality of openings;
• sleeve means secured to and formed around the innermost of the middle and lower shafts, covering the opening therethrough but spaced radially outwardly therefrom so as to permit the outer shaft to slide thereunder;
• manual button means, radially movably secured to the sleeve means and in contact with the cam button to move the cam button radially inwardly of the outer shaft to release the outer shaft;
• and stop means within the casing to limit the movement of the lower shaft over the middle shaft so that the cam button is axially aligned with the plurality of holes in the lower shaft.