초록 ▼

A dynamic seal for sealing radially two members that are displaceable relative to each other axially comprises a sealing body made of elastomeric material having two axially spaced, radially exterior sealing lips and two axially spaced, radially interior sealing lips, and a supporting body bearing t

A dynamic seal for sealing radially two members that are displaceable relative to each other axially comprises a sealing body made of elastomeric material having two axially spaced, radially exterior sealing lips and two axially spaced, radially interior sealing lips, and a supporting body bearing the sealing body and consisting of a harder material than the sealing body, in particular of a plastic. The supporting body possesses a radially exposed guiding portion extending between two sealing lips in the axial direction for axially guiding the movable member, and an anchoring portion opposing the guiding portion for anchoring the seal in the other member.

대표청구항 ▼

1. A seal for mutually sealing radially two members that are displaceable relative to each other axially, comprising: a sealing body made of elastomeric material having two axially spaced, radially exterior sealing lips and two axially spaced, radially interior sealing lips, anda supporting body bea

1. A seal for mutually sealing radially two members that are displaceable relative to each other axially, comprising: a sealing body made of elastomeric material having two axially spaced, radially exterior sealing lips and two axially spaced, radially interior sealing lips, anda supporting body bearing the sealing body and consisting of a harder material than the sealing body,wherein the supporting body has a radially exposed guiding portion extending between respective two sealing lips of one of said two radially interior and said two radially exterior sealing lips in the axial direction, said respective two sealing lips extending beyond the guiding portion in the radial direction, andwherein the supporting body has an anchoring portion opposing the guiding portion, the anchoring portion being disposed between and extending in the radial direction beyond respective two sealing lips of the other one of said two radially interior and said two radially exterior sealing lips. 2. The seal according to claim 1, wherein the guiding portion of the supporting body is configured on a radially inwardly pointing surface of the seal. 3. The seal according to claim 2, wherein the material of the sealing body is formed onto the supporting body in a primary forming process. 4. The seal according to claim 3, wherein the material of the sealing body penetrates the supporting body. 5. The seal according to claim 4, wherein the supporting body possesses at least one axial passage filled with the material of the sealing body. 6. The seal according to claim 5, wherein the material of the supporting body is a polymeric material. 7. The seal according to claim 6, wherein the axial cross section of at least the sealing body is tilt-symmetric relative to a radial axis of symmetry. 8. The seal according to claim 4, wherein the supporting body and the sealing body of the seal are manufactured by two-step injection molding, first the supporting body, which is subsequently overmolded with the sealing body. 9. The seal according to claim 1, wherein the two sealing lips extending beyond the guiding portion in the radial direction extend away from each other in the axial direction and the two sealing lips between which the anchoring portion is disposed extend towards each other in the axial direction. 10. The seal according to claim 9, wherein the supporting body and the sealing body of the seal are manufactured by two-step injection molding, first the supporting body, which is subsequently overmolded with the sealing body. 11. The seal according to claim 1, wherein the supporting body and the sealing body of the seal are manufactured by two-step injection molding, first the supporting body, which is subsequently overmolded with the sealing body. 12. A control device, comprising a first member that is displaceable axially by means pneumatic pressurization, and a stationary second member relative to which the first member is guided axially displaceably, wherein the two members are mutually sealed radially by means of the seal recited in claim 1 such that the guiding portion of the supporting body of the seal performs an axial guidance function for the axially displaceable member during operation of the control device. 13. An electromagnetically actuated valve, comprising a sealing element which is arranged to close a sealing seat when in a closed position,an axially movable control piston coupled with the sealing element,a sleeve within which the control piston is mounted so as to be axially displaceable,an electrically energizable coil, with the control piston being movable, through electrical energizing of the coil, against a mechanical load acting on the control piston,wherein the control piston has a pressure compensation bore in the axial direction, with the control piston and the sleeve being mutually sealed radially by means of the seal recited in claim 1 such that the guiding portion of the supporting body of the seal performs an axial guidance function for the control piston during operation of the valve. 14. The valve according to claim 13, wherein the sealing seat has substantially the same nominal width as the radially interior sealing lips. 15. The valve according to claim 13, wherein the control piston is movable, through electrical energizing of the coil, against the mechanical load acting on the control piston into a position in which the sealing element assumes the closed position. 16. The valve according to claims 13, wherein the mechanical load acting on the control piston is effected by means of a spring which urges the control piston into the closed position.