Patent ID: 8776963
Filing Date: 2014-07-15
Classification: F16F

Abstract:
1. Device for damping, at the end of travel, of the movement of a body capable of moving between two positions, a first and a second position, relative to a given frame of reference, the device comprising: a first abutment defining the first position, this said first abutment being connected to the said frame of reference, a second abutment defining the second position, this said second abutment being connected to the said frame of reference, a first cylinder, a first wall closing off a first end of the said first cylinder and capable of coming into contact with the said first abutment, a first piston mounted to slide sealingly in the said first cylinder in order to delimit between it, the internal wall of the first cylinder and the said first wall, a first chamber with a volume varying according to the sliding of the said first piston in the first cylinder, a second cylinder with an external section at most equal to the internal section of the first cylinder, means for mounting the said second cylinder in cooperation with the first piston, the first piston closing off a first end of the said second cylinder and this second cylinder being not situated in the first chamber, a second piston mounted to slide sealingly in the said second cylinder in order to delimit between it, the internal wall of the second cylinder and the said first piston, a second chamber with a volume varying according to the sliding of the second piston in the second cylinder, a first fluid filling the two chambers, the first and second chambers, means for placing the said first and second chambers in fluidic communication under a pressure loss of at least a given value, a third abutment capable of coming into contact with the said second abutment, means for mounting the said third abutment in cooperation with the said second piston, this said third abutment having a movement correlative with that of the second piston and being situated in the half-space delimited by the said second piston and opposite to that in which the second chamber is situated, means for connecting the said second cylinder to the said body, and means for connecting the said second cylinder to the said frame of reference, wherein the means for connecting the second cylinder to the body consist of a rod passing through the first wall via a first sealed passageway and capable of sliding in the said first sealed passageway, a first end of the said rod being mounted integrally on the first piston on its face turned towards the first chamber and its second end being connected to the body, the length of the said rod being determined to have this second end outside the said first chamber.