Patent ID: 6137040
Filing Date: 2000-10-24
Classification: G10D

Abstract:
A spring and spring support structure for rotating a shaft to a selected orientation comprising:the spring support structure comprisinga shaft support, a rotary shaft rotatably supported in the shaft support, a cam on the shaft which is rotatable with the shaft and which is operable to set the rotation orientation of the shaft;a spring support rotatably supported to the cam;a spring between the spring support on the cam and the shaft support such that the spring normally urges the cam and the shaft toward a first rotation orientation and such that rotation of the cam and the shaft off the first rotation orientation is opposed by the spring which urges the cam and the shaft toward the first rotation orientation;the spring support having a window therein and the window having an engagement groove at and around the window and defining the window;a bearing between the cam and the spring support for permitting relative rotation between them, the bearing being so positioned in the window that the spring draws on the spring support in a direction for urging the engagement groove of the spring support against the bearing so that the spring support is supported on the bearing, the window being sized larger than the outside periphery of the bearing in the window, whereby the bearing can be easily inserted into the window and can engage the engaging groove of the window and can be removed from the engagement groove and the window.