Patent ID: 11971055
Assignee: FESTO SE &CO. KG
Field: Mechanical elements (Mechanical engineering)
Classification: CPC F | IPC F

Claim 17:
18. A fluid-actuated working cylinder, having a cylinder housing and a piston, which piston is displaceablv by fluid action and is arranged in a cylinder chamber enclosed by the cylinder housing, the cylinder housing having a cylinder tube whose inner circumferential surface forms a piston running surface against which the piston bears in a slidingly displaceable manner, wherein the cylinder tube is formed as a composite body with a tubular inner layer forming the piston running surface and a tubular support jacket enclosing the tubular inner layer with a radial supporting effect, wherein the tubular inner layer consists of a diffusion-tight glass material or of a diffusion-tight ceramic material and wherein the support jacket has a cellulose-containing and/or lignin-containing material structure, and
wherein the cylinder housing has two end walls which are each arranged in the region of one of the two axial end faces of the cylinder tube, are fastened to the cylinder tube and bound the cylinder chamber at the end face, wherein at least one of the two end walls is penetrated by a drive fluid channel enabling the supply and discharge of a fluidic pressure medium for driving the piston, and
wherein each end wall has a diffusion-tight wall inner layer facing the cylinder chamber and a wall outer layer which is thicker in relation thereto and acts as a support layer for the wall inner layer, the wall inner layer consisting of a diffusion-tight glass material or diffusion-tight ceramic material, and the wall outer layer having a cellulose-containing and/or lignin-containing material structure.