Damper valve for hydraulic power steering device

Details Damper valve for hydraulic power steering device Damper valve for hydraulic power steering device

1999-09-02

2000-11-21

Hepperle, Stephen M.

Fluid handling

Line condition change responsive valves

Bi-directional flow valves

1374938, 1882825, 1882826, F16K 1718

Patent

active

061488534

ABSTRACT:
A damper valve for a hydraulic power steering device is disposed on a hydraulic oil circuit for connecting an oil passage changing-over valve in a gear box and left and right oil chambers of a power cylinder, and is provided with a partition plate member for partitioning the interior of a valve casing into two valve chambers. The partition plate member is formed at equal intervals along a peripheral direction with a plurality of through holes. A first valve spring plate for opening/closing every other one of the plurality of through holes is fixed to one wall face of the partition plate member facing a first valve chamber of the two valve chambers positioned on the oil passage changing-over valve side, while a second valve spring plate for opening/closing the other every other one of the plurality of through holes is fixed to the other wall face of the partition plate member facing a second valve chamber of the two valve chambers positioned on the power cylinder side. The outer diameter of a first flat washer 38 for pressing the first valve spring plate is made larger than that of a second flat washer which holds the second spring plate, and the spring force of the first valve spring plate is made stronger than that of the second spring plate.

REFERENCES:
patent: 2748898 (1956-06-01), deCarbon
patent: 4352417 (1982-10-01), Stinson
patent: 4428567 (1984-01-01), Fournales
patent: 5584226 (1996-12-01), Roemer et al.

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