20090272040 | COMBINED MECHANISM OF ROLLER and SHAFT - The combined mechanism of roller and shaft has a roller provided with dust and moisture proof means at both surfaces thereof that contribute to smooth operation of the mechanism for prolonged lifespan. The hollow structure of the shaft results in saving the material and fabrication costs. The shaft is successfully divided into a pivot section and an axle section with the aid of dexterously designed collar ringing the shaft at its front end and a ferrule holding the roller which is hinged to the riveted tip of the pivot section. The collar and the ferrule make the mechanism universally applicable to sectionalized lift up door for various applications, such as garage or vehicle door without the need of preparing different sized shafts to meet individual specifications. | 11-05-2009 |