초록 ▼

An annular sealing element (16) for sealing an annular gap between the inner surface of a cylindrical wall and a cylindrical piston which can be displaced axially relative to said wall and is arranged concentrically therewith, has two separate annular and axially adjoining parts (42, 44), of which t

An annular sealing element (16) for sealing an annular gap between the inner surface of a cylindrical wall and a cylindrical piston which can be displaced axially relative to said wall and is arranged concentrically therewith, has two separate annular and axially adjoining parts (42, 44), of which the first part (42) consists of an elastomer material and the second part (44) consists of a rigid material. In order to ensure, in conjunction with a displaceable body of a valve, that the opening and closing behavior of the valve is as constant as possible, the two parts (42, 44) are connected to one another in a releasable manner, and the part (44) made of rigid material has an axial protrusion (46) which is formed integrally with it, runs around it in the form of a ring, passes more or less to the full extent through the part (42) made of elastomer material and has its end surface covered over to the full extent by the part (42) made of elastomer material. The axial protrusion (46), which runs around in the form of a ring, is designed and arranged such that a radial wall thickness S.sub.i of the part (42) made of elastomer material, on the radially inner flank of said protrusion, is approximately equal to a radial wall thickness S.sub.a on the radially outer flank of said protrusion. The radial extent S of the protrusion (46) is not more than 70% of the sum of the wall thicknesses S.sub.i +S.sub.a.

대표청구항 ▼

[What is claimed is:] [1.]the two parts (42, 44) are connected to one another in a releasable manner, in surface to surface contact and non-rotatable with respect to each other during use,the protrusion (46), which runs around in the form of a ring and is formed on the part (44) made of rigid materi

[What is claimed is:] [1.]the two parts (42, 44) are connected to one another in a releasable manner, in surface to surface contact and non-rotatable with respect to each other during use,the protrusion (46), which runs around in the form of a ring and is formed on the part (44) made of rigid material, passes substantially through the thickness (D) of the part (42) made of elastomer material in the axial direction,the part (42) made of elastomer material covers over the end surface of the protrusion (46) to the full extent, andthe wall thickness S.sub.i is approximately equal to the wall thickness S.sub.a.