Loading patent…
AssigneeGKN Sinter Metals, LLC
InventorsAntonio Casellas, Ewald May
Estimating the term…
The invention relates to a piston-cylinder arrangement, especially a shock absorber piston, comprising a piston body fitted with a peripheral web protruding from the peripheral surface in a section adjacent to the end of the piston to which support webs are attached, said web extending parallel and spaced in relation to each other in longitudinal direction towards the other end of the piston. Two adjacent support webs limit a grooveshaped recess, said webs being open on the ends opposite the peripheral web in longitudinal direction. The piston also comprises a collar-shaped sealing element made of thermoformable plastic material that is formed on the piston body in such a way that only part of the height of both the peripheral web and the support webs is formed in the material of the collar-shaped sealing element.
A piston for a piston-cylinder arrangement, in particular a shock absorber piston, with a piston body (6) that is provided with at least one peripheral web (12) on its peripheral surface in an area adjacent to a piston end (4.1), said peripheral web protruding above the peripheral surface and to which longitudinal support webs (10) attach that run parallel longitudinally at a distance from one another and extend in the direction toward the other end of the piston (5.1), wherein there is a notch-shaped recess (1l) between any two adjacent support webs (10), which are open at their ends opposite to the peripheral web (12) in the longitudinal direction, and with a collarshaped seal (9) made of a thermoplastic sealing material that is formed onto the piston body (6) in such a way that both the peripheral web (12) as well as the support web (10) are press into the material of the collar-shaped seal (9) at least over a portion of their height.
A piston according to one of claims I through 3, characterized in that each of the collar-shaped seal's (9) edges (9.1, 9.2) extends beyond the end surface (4.1, 5.2) of the piston body (6) associated with it.
A piston according to one of claims 1 through 6, characterized in that the collarshaped seal (9) consists of PTFE as a thermoplastic synthetic.
A piston according to one of claims 12 through 7, characterized in that the collarshaped seal (9) is pressed on, calibrating its exterior surface (13) at least in its area overlapping the webs (10, 12).
Dependencies are inferred from the claim text.