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US 6,883,652 B2Granted
Heavy duty base valve
AssigneeTenneco Automotive Operating Company Inc.
InventorStefan Deferme
Life of this patent
Estimating the term…
Abstract
A dual tube shock absorber has a base valve assembly which includes both low speed control using a bleed type orifice and high speed/high pressure blow off control using a disc spring. The base valve assembly provides this variable damping force characteristic while reducing the dead length of the shock absorber.
Claims8
A shock absorber comprising:
- a pressure tube forming a working chamber;
- a piston body slidably disposed within said working chamber, said piston body dividing said working chamber into an upper working chamber and a lower working chamber;
- a piston rod attached to said piston body, said piston rod extending through one end of said pressure tube;
- a reserve tube surrounding said pressure tube to form a reservoir chamber between said reserve tube and said pressure tube;
- a base valve assembly disposed between said working chamber and said reserve chamber, said base valve assembly comprising:
- a cylinder end disposed between said pressure tube and said reserve tube, said cylinder end defining a central fluid passage;
- an intake valve directly engaging said cylinder end to close said central fluid passage, said intake valve defining a plurality of compression passages;
- and
- a disc spring having an outer circumferential edge biased against only said intake valve to close said plurality of compression passages.
6 more elements
Dependencies are inferred from the claim text.