UNFIXTURING DEVICE Russian patent published in 2011 - IPC E01H5/06 

FIELD: mechanics.

SUBSTANCE: device includes levers in series connected by means of movable connection, through which force is transmitted to return spring element when levers move under action of force; at that, spring element is connected to extension piece of lever, blade construction connected by means of a joint. Force acting on blade construction is transmitted to levers when the impact force acting on blade construction moves the blade construction and levers connected to it. Movable connection is located lower relative to the ground than straight line passing through connections on ends of levers. Version of unfixturing device is described.

EFFECT: unfixturing at angle of slope when the blade collides with obstacle.

19 cl, 7 dwg