Frictionless damper
AssigneeTayco Developments, Inc.
InventorsDouglas P. Taylor, David A. Lee
Life of this patent
Estimating the term…
Abstract
A frictionless hydraulic damper having a cylinder and a piston head and piston rod connected to the piston head, with the piston head dividing the cylinder into chambers on opposite sides thereof and with the piston rod extending beyond the cylinder, and with sealed bellows extending between the end walls of the cylinder and opposite sides of the piston which confine the fluid to the space between the outside of the bellows and the wall of the cylinder and thus prevent leakage of hydraulic fluid from the cylinder and eliminate the need for fluid seals on the piston rod.
Claims22
A fluid damper comprising a cylinder, first and second opposite end walls in said cylinder, piston means, said piston means including an elongated piston rod having a first portion between said first and second end walls and a second portion extending outwardly away from said first portion and a piston head mounted on said first portion of said piston rod, first and second sides on said piston head facing said first and second end walls, respectively, said piston head dividing the space in said cylinder between said first and second end walls into a first cylinder chamber between said first side and said first end wall and into a second cylinder chamber between said second side and said second end wall, guide means for guiding said piston means for linear movement relative to said cylinder, a first fluid-tight bellows in said first chamber mounted in sealed relationship between said first end wall and said first side of said piston, a second fluid-tight bellows in said second chamber mounted in sealed relationship between said second end wall and said second side of said piston, said first portion of said piston rod being located within said second bellows, fluid in said first and second cylinder chambers located entirely outside of said first and second bellows, respectively, orifice means located relative to said piston head for permitting flow of fluid past said piston head between said first and second cylinder chambers during movement of said piston head, first engagement means on said cylinder for effecting engagement between said cylinder and a first external object, and second engagement means on said second portion of said shaft for effecting engagement between said shaft and a second external object which is movable relative to said first external object.
A fluid damper comprising a cylinder, first and second end walls on said cylinder, piston means in said cylinder, first and second sides on said piston means, said piston means dividing said cylinder into a first chamber between said first side and said first end wall and into a second chamber between said second side and said second end wall, a first bellows in said first chamber and having opposite ends in fluid-tight engagement with said first side and said first end wall, a second bellows in said second chamber and having opposite ends in fluid-tight engagement with said second side and said second end wall, an internal surface on said cylinder, fluid located in said first chamber between said first bellows and said internal surface and located in said second chamber between said second bellows and said internal surface, guide means for guiding said piston means for movement toward and away from said first and second end walls, and orifice means located relative to said piston means for permitting flow of fluid between said first and second chambers in response to said movement of said piston means toward and away from said first and second end walls.
Dependencies are inferred from the claim text.