Position sensitive damper
OwnerDenis Boivininventor
Life of this patent
Estimating the term…
Abstract
The damper generally has a cylinder with a damping fluid, and a piston having a connecting rod slidably carrying a first damping piston head and an obstructing portion in the cylinder. Further, a second damping piston head is slidably mounted in the cylinder, independently from the piston, and biased to a neutral position. The second damping piston head has a damping flow path and a bypass flow path which is normally kept in an open state. When an abnormally strong shock occurs, the displacement of the first damping piston head exceeds its normal displacement span and the obstructing portion is placed into obstruction with the bypass flow path, thereby forcing the damping fluid through the damping flow path of the second damping piston head.
Claims20
A damper comprising a cylinder with a damping fluid, a piston having a connecting rod slidably carrying a first damping piston head and an obstructing portion in the cylinder, and a second damping piston head slidably mounted in the cylinder independently from the piston and biased to a neutral position, the second damping piston head having a damping flow path and a normally open bypass flow path, the normally open bypass flow path being obstructable by the obstructing portion to force the damping fluid through the damping flow path.
A method of damping with a damper having a first damping piston head and an obstructing portion collectively normally slid in a first portion of a cylinder having damping fluid and a second piston head having a bypass flow path and a damping flow path, the second piston head being slidable in a second portion of the cylinder, independently of the first piston head, and biased to a neutral position, the method comprising:
- sliding the first damping piston head and the obstructing portion into the second portion of the cylinder, thereby obstructing the bypass flow path of the second piston head with the obstructing portion and forcing damping fluid through the damping flow path.
A damper comprising a first damping piston head, and a second piston head having a compression damping flow path and a normally open bypass flow path, both the first piston head and the second piston head being slidably mounted in an elongated cylinder having damping fluid therein, the cylinder having a first portion and a second portion along its length, the damper also having a blocking portion configured and adapted for blocking the bypass flow path when the first piston head slides into the second portion of the cylinder, thereby forcing the damping fluid into the compression damping flow path of the second piston head;
- the damper being CHARACTERIZED IN THAT the second piston head is slidable in the cylinder independently from the first piston head and is slidably biased to an equilibrium position along the cylinder, and in that the blocking portion is associated with the first piston head.
Dependencies are inferred from the claim text.