A seal between an outer part and a circular cylindrical inner part, which is accommodated within the outer part at least in sections, includes a sealing ring having a groove portion and consisting of high-temperature-resistant thermoplastic plastics material. The outer part and the inner part are mo
A seal between an outer part and a circular cylindrical inner part, which is accommodated within the outer part at least in sections, includes a sealing ring having a groove portion and consisting of high-temperature-resistant thermoplastic plastics material. The outer part and the inner part are movable in a linear manner in relation to each other. A circumferential groove, into which the groove portion of the sealing ring is inserted at least in sections, is realized on an inner circumference of the outer part or on an outer circumference of the inner part. The sealing ring is in one part, and the groove is closed.
대표청구항▼
1. A seal for use in a parking brake which is releasable by pressure means in which the parking brake includes an outer part in the form of or part of a housing and an inner part that is a brake piston or is fastened to a brake piston operably disposed within the housing, the brake piston configured
1. A seal for use in a parking brake which is releasable by pressure means in which the parking brake includes an outer part in the form of or part of a housing and an inner part that is a brake piston or is fastened to a brake piston operably disposed within the housing, the brake piston configured to be prestressed against a plate stack within the housing by a spring, wherein the outer part and the inner part are movable in a linear manner in relation to each other, the seal disposed between the outer part and the inner part, which is accommodated within the outer part at least in sections, the seal comprising: a one piece sealing ring composed of a high-temperature-resistant thermoplastic material, the sealing ring having an open U-shaped profile including a main portion and two elongated legs extending from said main portion to define the U-shaped profile, one of said legs including a groove portion at an end of the leg opposite the main portion, and the other of said legs including a sealing portion configured as a sealing lip; anda closed circumferential groove, sized and configured to receive only the groove portion of the sealing ring inserted therein at least in sections, defined in an inner circumference of the outer part or defined in an outer circumference of the inner part, wherein the circumferential groove and the other of the outer part or the inner part translate linearly in relation to each other. 2. The seal as claimed in claim 1, wherein the sealing ring is composed of polyphenylene sulfide. 3. The seal as claimed in claim 1, wherein: the groove is formed on the inner circumference of the outer part, andthe inside surface of the sealing portion of the sealing ring has two conical portions defining the sealing lip, the conical portions forming one leg of the U-shaped profile. 4. The seal of claim 3, wherein the U-shaped profile of said sealing ring is open toward the brake piston and said two conical portions are angled radially outward away from said brake piston and toward the main portion in relation to the outer circumference of the inner part. 5. The seal as claimed in claim 1, wherein: the groove portion and the groove each have a generally rectangular cross section, anda respective axial dimension of the groove portion and the groove is greater than a respective radial dimension of the groove portion and the groove. 6. The seal as claimed in claim 5, wherein the axial dimensions of the groove portion and the groove are configured for snap fit engagement of the groove portion within the groove. 7. The seal as claimed in claim 5, wherein the sealing ring includes: a main portion extending radially between said groove portion and said sealing portion; anda tubular elastic portion connecting said groove portion to said main portion, the tubular elastic portion forming one leg of the U-shaped sealing ring. 8. The seal as claimed in claim 7, further comprising a support ring arranged between the housing and the inner part and between the plate stack and the main portion of said sealing ring. 9. The seal as claimed in claim 8, wherein the support ring is reinforced by glass fibers. 10. A seal for use in a parking brake which is releasable by pressure means, the seal comprising: a one piece sealing ring composed of a high-temperature-resistant thermoplastic material, the sealing ring including;an open U-shaped profile including a main portion and two elongated legs extending from said main portion to define the U-shaped profile, one of said legs including a groove portion at an end of the leg opposite the main portion, and the other of said legs including a sealing portion configured as a sealing lip;the main portion extending radially between said groove portion and said sealing portion; andsaid one of said legs formed by a tubular elastic portion connecting said groove portion to said main portion,wherein only the groove portion of the sealing ring is configured to be inserted at least in sections into a circumferential groove of a part of the parking brake. 11. The seal as claimed in claim 10, wherein the sealing ring is composed of polyphenylene sulfide. 12. The seal as claimed in claim 10, wherein the groove is formed on the inner circumference of the part of the parking brake, and the inside surface of the sealing portion of the sealing ring has two conical portions defining the sealing lip, the conical portions forming one leg of the U-shaped profile. 13. The seal as claimed in claim 10, wherein the groove portion and the groove each have a generally rectangular cross section, and a respective axial dimension of the groove portion and the groove is greater than a respective radial dimension of the groove portion and the groove. 14. The seal as claimed in claim 13, wherein the axial dimensions of the groove portion and the groove are configured for snap fit engagement of the groove portion within the groove.
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이 특허에 인용된 특허 (11)
Kyle M. Muramoto, Combined parking and service brake.
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