Piston sealing arrangement for pressure-fluid-operated systems
AssigneeAlfred Teves GmbH
InventorJuergen Schonlau
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Abstract
A piston sealing arrangement for pressure-fluid-operated systems is disposed in an annular recess of a piston (5) or an associated housing (4) and is composed of a sealing ring element (1A, 1B) as well as an elastic element (2, 3) acting on one side in opposition to the direction of the pressure force (A). Herein the elastic element is dimensioned such that the sealing ring element (1) moves against its elastic element (2, 3) at a pressure smaller than the force against which the piston (6) is moving and by which it is kept on its stop, a pressure-fluid film being formed as a result which safeguards a uniform initial movement of the piston to a largest possible degree.
Claims8
In combination:
- housing means defining a bore;
- a piston slidably disposed within said bore for axial positioning in response to fluid pressure axially applied thereto;
- an annular recess closed at an interface between said housing means and said piston;
- an annular seal disposed within said recess;
- first biasing means having a first characteristic spring constant disposed within said recess and operative to urge said seal in a direction axially opposed to said applied fluid pressure;
- and
- second biasing means having a second characteristic spring constant operative to urge said piston in a direction axially opposed to said applied fluid pressure, said second rate exceeding said first rate.
A piston sealing arrangement for pressure-fluid-operated systems which is placed in an annular recess intermediate a piston and an associated housing, said sealing arrangement comprising a sealing ring element and an elastic element acting on one side of said sealing ring element such that the elastic element biases said sealing ring element in a direction opposed to fluid pressure applied to said piston, wherein the elastic element axially yields at lower pressure than does the piston sealed in relation to the housing.
Dependencies are inferred from the claim text.