公开(公告)号：US11821444B2

公开(公告)日：2023-11-21

申请号：US17838330

申请日：2022-06-13

Applicant: Festo SE & Co. KG

Inventor： Michael Rau ,  Stephan Widmayer ,  Nenad Bartolic

IPC: F15B15/14 ,  F15B15/22 ,  F15B15/28 ,  F16J1/00 ,  F16J15/328 ,  F16J15/3232

CPC classification number: F15B15/1452 ,  F15B15/1471 ,  F15B15/226 ,  F15B15/2807 ,  F16J1/005 ,  F16J1/006 ,  F16J1/008 ,  F16J15/328 ,  F16J15/3232

Abstract: A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides. The piston further includes an annular enveloping body which has rubber elastic characteristics.

公开(公告)号：US20220397132A1

公开(公告)日：2022-12-15

申请号：US17838330

申请日：2022-06-13

Applicant: Festo SE & Co. KG

Inventor： Michael Rau ,  Stephan Widmayer ,  Nenad Bartolic

IPC: F15B15/14 ,  F15B15/28 ,  F15B15/22

Abstract: A piston for a fluid-actuated working cylinder, with a piston base unit which is coaxial to a piston longitudinal axis, consisting of a rigid core body which has radial outer peripheral surface and of an annular filling body which is seated in an annular receiving groove. The receiving groove is coaxial to the piston longitudinal axis and in the region of the radial outer peripheral surface is designed with a radially outwardly facing groove opening in the core body. The piston further includes a ring element which consists of plastic. The ring element radially outwardly coaxially encompasses the piston base unit at least in the region of the filling body, being radially supported with a radial inner peripheral surface on the piston base unit, projecting radially beyond the radial outer peripheral surface of the core body and comprising an axially orientated axial support surface radially outside the piston base unit on its two axial face sides. The piston further includes an annular enveloping body which has rubber elastic characteristics.