Patent ID: 7757406
Filing Date: 2010-07-20
Classification: G01C

Abstract:
1. A device to assist a driver/operator of nearly all types of vehicles in measuring and showing the grade/slope of any road/terrain that said vehicle is traveling on, where said device is either portable whereby it is installed in one of many possible positions inside said vehicle and/or fixed in said vehicle as part of initial manufacturing of said vehicle; said device comprising in cooperative relationship: a first see-through cylinder which is held in between two round caps/embodiments forming a sealed shell; a first gear connected to a main shaft with said shaft connected at its two ends to the centers of said two round caps/embodiments of said sealed shell and said caps/embodiments' outside relief cylinders with said relief cylinders also used to connect said device to said vehicle; two frames hung from said main shaft by one hole each; a gravity weight held between and on the bottom of said frames by a bolt and nut; an assembly containing a second and a third gear connected to a shaft which in turn is installed parallel to previously said main shaft between said frames through two holes; a forth gear and an indicating drum connected to a bush which together turn on previously said main shaft; a display on said indicating drum for displaying said slope/grade; a second see-through cylinder which slides on the said first see-through cylinder with a horizontal indicating line marked on it; a flat half-circle-shaped spring with curved bottom and straight top, with the bottom of its curved part connected to the top of the bottom part of previously said frames; a pair of brake shoes connected to the outside ends of the curved part of said balance spring, said pair of brake shoes separated from the internal cylindrical surface of the previously said indicating drum by a small gap; a pair of weighs connected to the internal corners of said balance spring where the flat and curved part of said spring join so as to be connected on the opposite side of said spring where the previous said pair of brake shoes were connected.