Rosenberg, Klein & Lee
Umbrella
 An umbrella includes a shaft having a plurality of ribs radially and pivotally connected to a finishing cap on the top of the shaft and a sleeve is slidably mounted to the shaft. A stop, a first flange and a second flange respectively extend radially outward from the sleeve, wherein the first flange is located between the stop and the second flange. A collar is movably mounted to the sleeve and located between the stop and the first flange. A plurality of first stretchers pivotally connected between the collar and the ribs. A runner is movably mounted to the sleeve and located between the first flange and the second flange. A plurality of second stretchers are pivotally connected between the runner and the ribs. The sleeve is pushed toward the collar to move the collar and to let the panel be expanded by the first stretchers and the movement of the ribs expand the second stretchers. 
A A
A45B A45B
inventional inventional
Ching-Tsai Chieh-Chih Chen-Maan
Chen Wu Chang