Anti-swish mechanism for a damper
AssigneeTenneco Automotive Inc.
InventorStefan Deferme
Life of this patent
Estimating the term…
Abstract
An anti-swish mechanism for a damper is disclosed to reduce the swish noise heard during movement of a piston assembly within the damper. The damper includes a pressure cylinder which forms a working chamber having a first portion and a second portion operable to store damping fluid. A piston rod is partially disposed within a pressure cylinder and a piston body is secured within the piston rod. Extending from the piston body are first and second annular axially extending lands which are concentric with the piston body. A set of axially extending, circumferentially spaced flow ports are formed in the piston body between the first and second annular axially extending lands. Adjacent to the flow ports is an anti-swish mechanism which reduces "swish" noise as the piston body moves within the pressure cylinder.
Claims10
A damper comprising:
- a pressure cylinder forming a working chamber operable to store damping fluid;
- a piston rod at least partially disposed within said pressure cylinder;
- a piston body disposed in said pressure cylinder and secured to said piston rod, said piston body separating said working chamber into a first portion and a second portion;
- a continuously open flow path extending between said first and said second portions of said working chamber;
- a first annular axially extending land being concentric with said piston body;
- a second annular axially extending land being concentric with said piston body;
- a plurality of axially extending, circumferentially spaced flow ports formed concentrically with said piston body between said first annular axially extending land and said second annular axially extending land;
- and
- anti-swish means positioned adjacent to said circumferentially spaced flow ports for reducing swish noise as said piston body moves in said pressure cylinder, said anti-swish means being disposed within said open flow path and including an annular axially extending sub-land being concentric with said piston body and positioned between said first annular axially extending land and said second annular axially extending land.
A damper comprising:
- a pressure cylinder forming a working chamber operable to store damping fluid;
- a piston rod at least partially disposed within said pressure cylinder;
- a piston body disposed in said pressure cylinder and secured to said piston rod, said piston body separating said working chamber into a first portion and a second portion;
- a continuously open flow path extending between said first and said second portions of said working chamber;
- a first annular axially extending land being concentric with said piston body;
- a second annular axially extending land being concentric with said piston body;
- an annular axially extending sub-land being concentric with said piston body and positioned between said first annular axially extending land and said second annular axially extending land
- an annular anti-swish chamber being concentric with said piston body between said first annular axially extending land and said second annular axially extending land, said anti-swish chamber being disposed within said open flow path;
- and
- a plurality of axially extending, circumferentially spaced flow ports formed concentrically with said piston body adjacent to said second annular land, wherein said damping fluid flows from said first portion to said second portion of said working chamber through said plurality of axially extending, circumferentially spaced flow ports, with said damping fluid first passing into said annular anti-swish chamber to reduce swish noise.
Dependencies are inferred from the claim text.