Patent ID: 6840012
Filing Date: 2005-01-11
Classification: E05F,E05Y

Abstract:
1. A rail-less window lifter, comprising: a cable; a window glass guide frame; a window glass; a linking member attached to the window glass and the cable and, applying a force to the window glass while the window glass is being raised, wherein A is a front lower point of contact of the window glass with the window glass guide frame; B is a rear upper point of contact of the window glass with the window glass guide frame; G is the center of gravity of the window glass; C is a point where said linking member applies the force to the window glass; F is the magnitude of the force applied by the linking member to the window glass; tan φ is the coefficient of friction between the window glass and the window glass guide frame; β is an angle of inclination of the window glass guide part with respect to a vertical direction; P is a force of gravity applied to a mass of the window glass; {right arrow over (y)} is a unit vector directed in the vertical direction defined by gravity; {right arrow over (x)} is a unit vector directed along a horizontal direction; Rar is a magnitude of a force of the frame on the window glass at the point B, equal to (P−F·(sin β·tan(β+φ)+cos β))/(sin(β−φ)−cos(β−φ)·tan(β+φ)); a position of C is defined such that: