Patent US4141562A successfully refreshed from Google Patents.
US4141562A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of enhancing the performance of lip-type shaft seals
Assignee: Vickers Inc
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Filing: 1975-02-03
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Granted: 1979-02-27
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Expires: 1995-02-03
Abstract
Abstract A lip-type cartridge shaft seal has its toroidal body cavity filled with a silicone rubber adhesive sealant bonded to the main body of the seal. The silicone's adhesive properties and its lower hardness stabilize the body against collapse under intermittent or continuous high pressure forces without interfering with body flexibility.
Inventors
- 👤 David H. Wu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:12
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3284; F16J15/3204; F16J15/3208
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
222 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing being under high internal fluid pressure, the method comprising providing in the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip, a first portion extending from the sealing lip axially outwardly, and a second portion extending thence radially outwardly and axially inwardly providing a generally toroidal space facing inwardly toward the internal fluid pressure, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft and preventing deterioration of said first portion by its being forced radially inwardly down upon said shaft by the fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material in contact with said fluid pressure, and bonding said ring to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft, preventing said fluid from getting between said ring and said first portion, and allowing said first portion to retain its flexibility without any substantial interference from said ring.
Claim 2
Independent Claim
222 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing being under high internal fluid pressure, the method comprising providing in the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip, a first portion extending from the sealing lip axially outwardly, and a second portion extending thence radially outwardly and axially inwardly providing a generally toroidal space facing inwardly toward the internal fluid pressure, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft and preventing deterioration of said first portion by its being forced radially inwardly down upon said shaft by the fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material in contact with said fluid pressure, and bonding said ring to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft, preventing said fluid from getting between said ring and said first portion, and allowing said first portion to retain its flexibility without any substantial interference from said ring.
Claim 3
Dependent Claim
39 words
The method according to claim 1 wherein at least said first portion of said body is composed of an elastomeric material and in which said filling step comprises substantially filling said toroidal space with an elastomeric adhesive sealant material.
Claim 4
Dependent Claim
34 words
The method according to claim 2 wherein said filling step includes filling said space with an elastomeric adhesive sealant material having a hardness substantially less than that of the elastomeric portion of said body.
Claim 5
Dependent Claim
25 words
The method according to claim 1 including the step of providing said sealing lip with a predetermined amount of elasticity by incorporating a spring therein.
Claim 6
Dependent Claim
42 words
The method according to claim 1 including the steps of positioning said lip type seal body on a shaft with said toroidal space facing inwardly toward said fluid pressure and sealing said high internal fluid pressure with said lip type seal body.
Claim 7
Dependent Claim
44 words
The method according to claim 1 wherein said substantially filling step comprises substantially filling said toroidal space while said seal is on said shaft with a ring of elastomeric material in a fluid state and simultaneously curing and bonding said ring to said body.
Claim 8
Independent Claim
207 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing being under high internal fluid pressure, the method comprising providing in the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip, a first portion extending from the sealing lip axially outwardly, and a second portion extending thence radially outwardly and axially inwardly providing a generally toroidal space facing inwardly toward the internal fluid pressure, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft and preventing deterioration of said first portion by its being forced radially inwardly down upon said shaft by the fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material in contact with said fluid pressure, and bonding said ring to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft and preventing said fluid from getting between said ring and said first portion.
Claim 9
Independent Claim
207 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing being under high internal fluid pressure, the method comprising providing in the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip, a first portion extending from the sealing lip axially outwardly, and a second portion extending thence radially outwardly and axially inwardly providing a generally toroidal space facing inwardly toward the internal fluid pressure, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft and preventing deterioration of said first portion by its being forced radially inwardly down upon said shaft by the fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material in contact with said fluid pressure, and bonding said ring to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft and preventing said fluid from getting between said ring and said first portion.
Claim 10
Dependent Claim
236 words
The new use of a filler of elastomeric material in a generally toroidal space of a lip type seal body installed between a shaft and a housing being under high fluid pressure, the seal body having a radially inwardly extending shaft engaging sealing lip, a flexible first portion extending from the sealing lip axially outwardly, and a second portion extending radially outwardly and axially inwardly to provide said generally toroidal space, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft, said new use comprising preventing deterioration of said first portion of said lip type seal body when installed between a shaft and a housing and exposed to high internal fluid pressure with said toroidal space facing said fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material such that said material will be in contact with said high internal fluid pressure, and bonding said ring of material to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft, preventing said fluid from getting between said ring and said first portion, and allowing said first portion to retain its flexibility without any substantial interference from said ring.
Claim 11
Dependent Claim
236 words
The new use of a filler of elastomeric material in a generally toroidal space of a lip type seal body installed between a shaft and a housing being under high fluid pressure, the seal body having a radially inwardly extending shaft engaging sealing lip, a flexible first portion extending from the sealing lip axially outwardly, and a second portion extending radially outwardly and axially inwardly to provide said generally toroidal space, said first portion having a radially inner surface the diameter of which is greater than the inner diameter of said lip such that said inner surface is spaced from and out of contact with said shaft, said new use comprising preventing deterioration of said first portion of said lip type seal body when installed between a shaft and a housing and exposed to high internal fluid pressure with said toroidal space facing said fluid pressure, by substantially filling said toroidal space with a ring of elastomeric material such that said material will be in contact with said high internal fluid pressure, and bonding said ring of material to the entire surface of said body in contact with said ring, said filling and bonding steps including the steps of holding said first portion up off of said shaft, preventing said fluid from getting between said ring and said first portion, and allowing said first portion to retain its flexibility without any substantial interference from said ring.
Claim 12
Dependent Claim
59 words
The new use according to claim 8 including the steps of positioning said lip type seal body on said shaft with said toroidal space facing inwardly toward said fluid pressure such that said high internal fluid pressure is in contact with said ring of elastomeric material and sealing said high internal fluid pressure with said lip type seal body.
Claim 13
Independent Claim
244 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing having high internal fluid pressure, the method comprising providing the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip and also having a first portion spaced radially outwardly away from the shaft and extending from the sealing lip axially outwardly, having a second portion extending thence radially outwardly, and having a third portion extending thence axially inwardly to enclose on three sides a generally toroidal space facing inwardly toward the internal fluid pressure, and preventing deterioration of said lip type seal body due to exposure to said high internal fluid pressure tending to force said first portion radially inwardly into contact with the shaft by substantially filling said toroidal space with a ring of elastomeric material that can, when bonded to all axially extending portions of said seal body, hold said first portion radially outwardly away from and out of contact with a shaft in contact with said lip against the force of high internal fluid pressure in contact with said ring and tending to force said first portion radially inwardly into contact with the shaft, said ring of elastomeric material being located such that it is in contact with said fluid pressure, and bonding said ring to said body along at least all of said first and third portions of said body.
Claim 14
Independent Claim
244 words
A method for sealing the space between a shaft and a bore of a housing through which the shaft extends, the housing having high internal fluid pressure, the method comprising providing the space between the shaft and bore, a lip-type seal body having an axially inwardly extending, shaft-engaging sealing lip and also having a first portion spaced radially outwardly away from the shaft and extending from the sealing lip axially outwardly, having a second portion extending thence radially outwardly, and having a third portion extending thence axially inwardly to enclose on three sides a generally toroidal space facing inwardly toward the internal fluid pressure, and preventing deterioration of said lip type seal body due to exposure to said high internal fluid pressure tending to force said first portion radially inwardly into contact with the shaft by substantially filling said toroidal space with a ring of elastomeric material that can, when bonded to all axially extending portions of said seal body, hold said first portion radially outwardly away from and out of contact with a shaft in contact with said lip against the force of high internal fluid pressure in contact with said ring and tending to force said first portion radially inwardly into contact with the shaft, said ring of elastomeric material being located such that it is in contact with said fluid pressure, and bonding said ring to said body along at least all of said first and third portions of said body.
Claim 15
Dependent Claim
31 words
The method according to claim 10 wherein said step of substantially filling said toroidal space comprises substantially filling said toroidal space with a ring of elastomeric material impervious to said fluid.
Claim 16
Dependent Claim
35 words
The method according to claim 10 wherein said filling step comprises substantially filling said toroidal space with a ring of elastomeric material having a hardness in the range of about Short A30 to Shore A85.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-02-26 | 1982-08-28 | 1983-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-02-26 | 1986-08-28 | 1987-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-02-26 | 1990-08-28 | 1991-02-27 | $7700.00 | Window Closed / Lapsed |