Piston with direction-dependent advance opening cross sections

Details Piston with direction-dependent advance opening cross sections Piston with direction-dependent advance opening cross sections

1996-06-28

1998-07-28

Butler, Douglas C.

Brakes

Internal-resistance motion retarder

Valve structure or location

1882826, 18832222, F16F 932

Patent

active

057851603

ABSTRACT:
A vibration damper has a cylinder tube which is divided into two work chambers by a piston, which is fastened to a piston rod. The piston has a piston body which has fluid passage channels which are covered by valve discs on supporting bodies with valve support surfaces, and the piston body is in a sliding or frictional connection, by way of at least one piston ring, with the cylinder tube. The piston ring covers the peripheral surface of the piston body and is axially supported respectively on the upper side and the lower side of the piston. The piston body is in a disc-shape, is in one piece and is manufactured by stamping. Starting from the piston base body, the piston body areas which are raised on one side of the piston are depressions on the axially opposite side of the piston. The piston ring is able to move axially as a function of the direction of movement, and is actuated by the friction force between the cylinder tube and the piston ring. Between the surface of the piston ring facing the piston and the surface of the piston, there is at least one advance opening cross section which is opened as a function of the axial position of the piston ring in relation to the piston body.

REFERENCES:
patent: 5615756 (1997-04-01), Grundei et al.

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