Patent ID: 8328697
Filing Date: 2012-12-11
Classification: A63B,Y10T

Abstract:
1. A device for changing a load in various phases of movement comprising: a basic burden capable of substantially vertical movement; at least one hinge with a horizontal axis substantially disposed in a horizontal level; a lever having a first end coupled to said at least one hinge and capable of rotating around said horizontal axis, and a second end capable of positioning above the horizontal level; and at least one revolving means for revolving about an axle fixedly mounted on said basic burden and extending essentially parallel to said horizontal axis; wherein said lever freely leans against said at least one revolving means, and wherein said lever is positioned along the horizontal level while providing a maximum load; said lever is positioned at a positive angle to the horizontal level, while providing an increase of the load up to the maximal load during a positive phase of movement, and providing a decrease of the load from the maximal load during a negative phase of movement; and said lever is positioned at a negative angle to the horizontal level, while providing a decrease of the load from the maximal load during a positive phase of movement, and providing an increase of the load up to the maximal load during a negative phase of movement.