Back to results
US 6,148,969 AGranted
Frequency dependant damper
AssigneeTenneco Automotive Inc.
InventorLuc Lemmens
Life of this patent
Estimating the term…
Abstract
A gas shock absorber has a pressure tube which defines a working chamber. A piston divides the working chamber into an upper working chamber and a lower working chamber. A series of extension passages extend through the piston and are always left open. A series of compression passages extend through the piston and are opened and closed by a compression valve assembly. A rod guide assembly is located between the pressure tube and a piston rod. The rod guide assembly includes an oil chamber for sealing and lubricating the piston rod.
Claims7
A damper comprising:
- a pressure tube forming a working chamber;
- a piston disposed within said working chamber, said piston dividing said working chamber into an upper working chamber and a lower working chamber, said piston comprising:
- a piston body;
- a plurality of compression passages extending through said piston body;
- and
- a plurality of extension passages extending through said piston body, said extension passages being interconnected by inlet and outlet openings unobstructed for providing flow paths which are always completely open;
- a compression check valve disposed adjacent said piston body, said compression check valve closing said compression passages.
4 more elements
Dependencies are inferred from the claim text.