US 4,460,074 AGranted

Continuously open throttling fluid passage device for shock absorbers

AssigneeFichtel & Sachs AG

InventorsGerd Muller, Manfred Koller, Heinz Sydekum

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Abstract

In the illustrative embodiments described, a double tube shock absorber is provided with a continuously open throttling fluid passage device both on the piston valve unit and the bottom valve unit. The continuously open fluid passage device comprises a fluid passage chamber defined by a first wall member and a second wall member. The fluid passage chamber is connected to a first fluid chamber of the shock absorber by a first axially directed opening and to a second fluid chamber of the shock absorber by a second radially directed opening. The second radially directed opening is located radially outward of said first opening. The axial height of the fluid passage chamber continuously decreases in radial direction between said first opening and said second opening.

Claims21

Dependent claims

In a continuously open, throttling fluid passage device for hydraulic shock absorbers comprising two annular concentric wall members substantially perpendicular with respect to their common axis, namely, a first and a second wall member which cooperate in defining an annular fluid passage chamber, said fluid passage chamber being connected by at least one first substantially axially directed opening of said first wall member to a first fluid chamber and being further connected by at least one second substantially radially directed opening to a second fluid chamber, said second opening being located radially outward of said first opening,

the improvement that the axial height of said fluid passage chamber substantially continuously decreases from the location of said first axially directed opening toward the location of said second radially outwardly directed opening,
said first wall member contacts by its side remote from said fluid passage chamber a valve seat so as to define together with said valve seat an excess pressure valve, said excess pressure valve being opened, when the pressure in said first fluid chamber exceeds the pressure in said second fluid chamber by a predetermined amount.

Dependencies are inferred from the claim text.

Facts

Application: 06/337,467Filed 6 Jan 1982
Priority: DE 310088614 Jan 1981
Granted: 17 Jul 1984
Term ends: Not estimatedThe source records don’t support an estimate.

Classification4 codes

F16F 9/3487
Characterised by features of supporting elements intended to guide or limit the movement of the annular discs: with spacers or spacing rings
F16F 9/341
Special valve constructions ; Shape or construction of throttling passages: comprising noise-reducing or like features, e.g. screens
F16F 9/3484
Throttling passages in the form of annular discs or other plate-like elements which may or may not have a spring action, operating in opposite…:…
F16F
Springs