[특허]Radial shaft seal, radial shaft seal assembly and method of installation

[미국특허] Radial shaft seal, radial shaft seal assembly and method of installation 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	F16J-015/32
출원번호	US-0042533 (2011-03-08)
등록번호	US-9062773 (2015-06-23)
발명자 / 주소	Sedlar, Brent R. Toth, David M.
출원인 / 주소	Federal-Mogul Corporation
대리인 / 주소	Stearns, Robert L.
인용정보	피인용 횟수 : 2 인용 특허 : 33

초록 ▼

A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air side of the seal from an oil side of the seal is provided. The seal includes a mounting portion and a seal lip having a sealing surface extending between an oil side end and a free air side end. An annular bridge is connected to the oil side end of the seal lip by a first hinge and to the mounting portion by a second hinge. The bridge extends in radially overlying relation to the seal lip. A projection extends from the first hinge away from the bridge. A plurality of ribs extend radially inwardly from the projection. The ribs minimize friction between the seal and the shaft during installation and prevent the seal lip from inverting during the oil-side installation assembly.

대표청구항 ▼

1. A radial shaft seal configured for receipt in a housing and about a shaft to sealingly isolate an air side of the shaft seal from an oil side of the shaft seal, comprising: an annular mounting portion;a seal lip having an annular sealing surface extending between an oil side end and a free air side end, said sealing surface being configured to extend axially relative to the shaft;an annular bridge connected to said oil side end of said seal lip by a first hinge and to said mounting portion by a second hinge, said bridge extending from said first hinge to said second hinge in radially overlying relation to said seal lip;at least one projection extending from said first hinge away from said bridge toward said oil side of said seal, said at least one projection having a radially outwardly facing outer surface and a radially inwardly facing inner surface; anda plurality of circumferentially spaced ribs extending radially inwardly from said inner surface, wherein said ribs have an inner minimum diameter and said sealing surface has an inner maximum diameter, said minimum diameter being greater than said maximum diameter. 2. The radial shaft seal of claim 1 wherein said seal lip has a radially outwardly facing surface with a maximum diameter and said minimum diameter of said ribs is greater than said outwardly facing maximum diameter of said seal lip. 3. The radial shaft seal of claim 1 wherein said at least one projection has a length extending away from said first hinge and said ribs extend substantially along said length of said at least one projection. 4. The radial shaft seal of claim 1 further comprising a plurality of circumferentially spaced stiffening ribs extending axially along said outer surface of said at least one projection and said bridge. 5. The radial shaft seal of claim 1 wherein said at least one projection is circumferentially continuous. 6. The radial shaft seal of claim 1 further comprising a plurality of said projections spaced from one another by gaps. 7. The radial shaft seal of claim 6 wherein each one of said projections has a separate one of said ribs. 8. The radial shaft of claim 7 wherein a plurality of stiffening ribs extend axially along said bridge and along at least some of said outer surfaces of said projections. 9. The radial shaft seal of claim 8 wherein said stiffening ribs extend along each of said projections. 10. A radial shaft seal assembly, comprising: a shaft extending along a central axis and providing a running surface with a predetermined diameter; anda radial shaft seal configured for receipt in a housing and about said shaft to sealingly isolate an air side of the radial shaft seal from an oil side of the radial shaft seal, comprising:an annular mounting portion;a seal lip having an annular sealing surface and an opposite backing surface extending between an oil side end and a free air side end, said sealing surface being configured to extend axially in dynamic sealing contact with said running surface;an annular bridge attached to said oil side end of said seal lip by a first hinge and to said mounting portion by a second hinge, said bridge extending from said first hinge to said second hinge in radially overlying relation to said seal lip;at least one projection extending axially from said first hinge toward said oil side of said seal, said at least one projection having a radially outwardly facing outer surface and a radially inwardly facing inner surface; anda plurality of circumferentially spaced ribs extending radially inwardly from said inner surface, wherein said ribs are spaced radially outwardly out of contact from said running surface of said shaft. 11. The radial shaft seal assembly of claim 10 wherein said at least one projection has a length extending away from said first hinge and said ribs extend substantially along said length of said at least one projection. 12. The radial shaft seal assembly of claim 10 further comprising a plurality of circumferentially spaced stiffening ribs extending axially along said outer surface of said at least one projection and said bridge. 13. The radial shaft seal assembly of claim 10 wherein said at least one projection is circumferentially continuous. 14. The radial shaft seal assembly of claim 10 further comprising a plurality of said projections spaced from one another by gaps. 15. The radial shaft seal assembly of claim 14 wherein each one of said projections has a separate one of said ribs. 16. The radial shaft assembly of claim 15 wherein a plurality of stiffening ribs extend axially along said bridge and along at least some of said outer surfaces of said projections. 17. The radial shaft seal assembly of claim 16 wherein said stiffening ribs extend along each of said projections.

이 특허에 인용된 특허 (33) 인용/피인용 타임라인 분석

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Ting, Shih Chieh; Azni, Muhammad Mujahid; Rosly, Mohd Imran, Energy saving seal with main lip and dust lip hinge point.
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Antonini Joseph (Chicago IL) Gallo Paul E. (Berwyn IL), Floating lip seal assembly with convoluted flexible section.
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Antonini Joseph (Chicago IL) Gallo Paul (Berwyn IL), Floating lip seal with reinforced flexible portion.
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Downes Michael, Fluid side contamination exclusion sealing lip for radial shaft seals.
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Otto Dennis L. (Malvern OH), Hydrodynamic seal.
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Kanayama Hiroshi (Aichi JPX) Shimasaki Keiichi (Aichi JPX) Shibata Makoto (Aichi JPX), Lip seal device.
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MacDonald, George, Marine shaft seal with lip seal, bearing and gasket.
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Yamamoto,Tomonaga; Kariya,Isao, Multistage oil seal against different cutting fluids for a machine tool motor.
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Bailey John M. (Dunlap IL) Stratton Michael K. (Peoria IL), Seal for rotating means.
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이 특허를 인용한 특허 (2) 인용/피인용 타임라인 분석

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A	생활필수품
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[미국특허] Radial shaft seal, radial shaft seal assembly and method of installation 원문보기

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[미국특허] Radial shaft seal, radial shaft seal assembly and method of installation 원문보기

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이 특허에 인용된 특허 (33) 인용/피인용 타임라인 분석

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