Primary gasket for a cylinder assembly, cylinder assembly

Abstract

The present invention relates to a primary gasket () for a cylinder assembly (), wherein said cylinder assembly () comprises a cylinder () and a float () slidingly housed in a float housing () delimited by a cylinder wall () of said cylinder () for pressurizing a fluid, wherein said primary gasket () comprises an annular body () configured to be accommodated in a primary gasket housing () defined in said cylinder wall (), wherein the primary gasket housing () is delimited radially by an axial housing wall () and axially by a first radial housing wall () and a second radial housing wall () connected as an undercut to said axial housing wall (), wherein said annular body () comprises an inner lip (), a central lip (), an outer lip (), and a back portion (), wherein the back portion () comprises a back abutment surface () configured to abut against the first radial housing wall () of said primary gasket housing (), wherein the inner lip (), the central lip (), and the outer lip () extend from the back portion () in the axial direction (X-X) spaced apart from one another in the radial direction (R-R) from the opposite side of the back abutment surface (), wherein the inner lip () is configured to form a dynamic and static seal on the float (), wherein the outer lip () is configured to form a seal with said axial housing wall (), wherein the central lip () comprises an annular root (), which extends axially between said back portion () and a root edge (), wherein the central lip () comprises a plurality of protuberances (), wherein each protuberance () projects axially from said root edge (), wherein said plurality of protuberances () and said root edge () define a plurality of discharges (), wherein each discharge () is delimited by each protuberance () and a first neighboring protuberance () thereof of said plurality of protuberances () and by a free edge portion of said root edge (), which extends between each protuberance () and the first neighboring protuberance () thereof, wherein each protuberance () extends circumferentially by one protuberance extension (G), wherein each discharge () extends circumferentially by one discharge extension (L), wherein a sum of each discharge extension (L) is greater than a sum of each protuberance extension (G).