Vacuum Jug

Abstract

The present invention is using the elementary principle that a containers weight varies with the amount of fluid the container is containing. This observation is used in the present invention to show the amount of fluid in the container by a simple weight measurement of the container. The container/jug is placed on or hung one or more springs (FIG. 2. B.) or other material with the same elastic characteristic. The indicator of the fluid level is achieved by the inner containers position read in comparison to the outer container (FIG. 1. C). As the container/jug is emptied, the weight decreases and the inner container will get a higher rest position and a further bigger part of the inner container (indicator) will be visible. FIGS. 1 and 2 (left container) illustrate a jug filled with coffee (fluid). The spring is calibrated in a way that the inner container (A) has a rest position, where it is nearly invisible and covered by the outer container (C). FIGS. 1 and 2 (right container) illustrate a jug that is nearly empty. The inner container now has a considerable lesser weight and a high rest position. It gives a visual effect indicating the amount of fluid in the jug and it will be possible to make that estimate at a distance. As the jug empties the weight gets lesser and the container will get a rest level on a higher position and a rising part of the indicator will be visible. The advantages of the invention are the possibility from a distance to determine how much fluid the container/jug contains without shaking/lifting the jug, because the container/jug is changing form depending on how much fluid its contain.

1 . Container/jug with a fluid level indication characterized that the container is movable in proportion to an exterior/outer container depending of the weight of the inner container, and the indication is made visual by a weight based movement/change of the containers/thermojug appearance as the container empties. 
   
   
       2 . The container of  claim 1  characterized by the container are mounted on elastic parts, so there will be a movement as the inner containers empties/weight decreases. 
   
   
       3 . The container of  claim 1  characterized by the container is mounted on a springy/elastic construction—it can be a push or pull type, as long as it delivers the linear movement of the inner container as it empties/the weight fluctuate. 
   
   
       4 . The container of  claims 1  and  3  characterized by, the weight based movement of the container can be used to register the level of fluid by reading a scale or to visually establish the inner containers position against the outer. 
   
   
       5 . The container of  claims 1  and  4  characterized by, that the level indication can be read on a relatively further distance in comparison with known inventions like fx. U.S. Pat. No. 5,447,248 Kimberly, because the area used to indication are bigger existing methods. 
   
   
       6 . The container of  claim 1 - 5  characterized by, that the indication can be made in the way that the top of the jug raises over in time as the thermo jug is emptied and the top of, the thermo jug will in this way indicate “empty” in a “high position” and “full” in a “low position” 
   
   
       7 . The container of  claim 1 - 5  characterized by, that the indications are shown in the bottom or other places on the jug, where it is possible to show the inner containers position in relation to the outer container or “rack” 
   
   
       8 . The container based on the same principles of  claim 1 - 7  characterized by, that a weight based indication can be made by a separate unit, whereupon a “standard coffee jug” or alike can be placed. The indication in the design version is made by the separate unit that will make a visually established movement over time as the weights are de- and in-creased. The unit can with advantage be made adjustable and this way be used on different kinds of containers and a like.