Patent US2046166A successfully refreshed from Google Patents.
US4094518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Shaft seal
Assignee: FLAVELL Ltd Pty
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Filing: 1976-08-23
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Granted: 1978-06-13
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Expires: 1996-08-23
Abstract
Abstract A seal for sealing between a shaft and a shell where the shell is sealingly located between two webs which extend radially outwardly from a body portion, and inwardly towards each other.
Inventors
- 👤 Jack Jebson Cox
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 21:45
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/3436; F16J15/3456
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
358 words
A fluid seal for installation as a unit between first and second, relatively rotatable machine elements, said seal unit including a relatively rigid, annular seal case element having a mounting portion for engaging one of said machine elements and a radially extending flange portion having an axially directed first sealing surface facing toward the region to be sealed and an axially directed second sealing surface facing axially away from the region to be sealed, and an annular elastomeric seal element molded into a single piece, said elastomeric element having a seal body including a radially inwardly directed portion adapted to engage the other of said machine elements to form a secondary seal therewith, and first and second, axially inner and outer sealing lip portions extending radially outwardly from the axial ends of said body, said lip portions being spaced apart from each other at the radially inner ends thereof by a radially outwardly facing, circumferentially extending seal body surface, said lips each including a sealing edge adjacent the radially outer portions thereof and having said radially outer portions thereof extending axially towards each other in use, with said sealing edges of said axially inner and outer lips lying in use respectively axially inwardly and outwardly of the central plane of said radial flange of said case element, said edges being also spaced radially apart from each other, said sealing edges being disposed, as said elastomeric element is formed, in axially overlapping relation such that said radially outer edge of said axially inner lip lies axially outwardly of said central plane of said radial flange and said radially outer edge of said axially outer lip lies axially inwardly of said central plane of said radial flange, said case element being positioned in use such that said radial flange thereof extends between said lips, such that said lip edges engage said first and second flange surfaces, respectively, in snug engagement, said lips being thereby biased towards each other and toward said first and second flange surfaces by the inherent resiliency of said lips, thereby furnishing an axially directed sealing force for application to said first and second sealing surfaces respectively.
Claim 2
Dependent Claim
358 words
A fluid seal for installation as a unit between first and second, relatively rotatable machine elements, said seal unit including a relatively rigid, annular seal case element having a mounting portion for engaging one of said machine elements and a radially extending flange portion having an axially directed first sealing surface facing toward the region to be sealed and an axially directed second sealing surface facing axially away from the region to be sealed, and an annular elastomeric seal element molded into a single piece, said elastomeric element having a seal body including a radially inwardly directed portion adapted to engage the other of said machine elements to form a secondary seal therewith, and first and second, axially inner and outer sealing lip portions extending radially outwardly from the axial ends of said body, said lip portions being spaced apart from each other at the radially inner ends thereof by a radially outwardly facing, circumferentially extending seal body surface, said lips each including a sealing edge adjacent the radially outer portions thereof and having said radially outer portions thereof extending axially towards each other in use, with said sealing edges of said axially inner and outer lips lying in use respectively axially inwardly and outwardly of the central plane of said radial flange of said case element, said edges being also spaced radially apart from each other, said sealing edges being disposed, as said elastomeric element is formed, in axially overlapping relation such that said radially outer edge of said axially inner lip lies axially outwardly of said central plane of said radial flange and said radially outer edge of said axially outer lip lies axially inwardly of said central plane of said radial flange, said case element being positioned in use such that said radial flange thereof extends between said lips, such that said lip edges engage said first and second flange surfaces, respectively, in snug engagement, said lips being thereby biased towards each other and toward said first and second flange surfaces by the inherent resiliency of said lips, thereby furnishing an axially directed sealing force for application to said first and second sealing surfaces respectively.
Claim 3
Dependent Claim
58 words
A fluid seal unit as defined in claim 1 in which an annular seal body stiffening element is provided, said stiffening element being disposed in use within said seal body, said stiffener engaging said outwardly facing, circumferentially extending seal body surface and urging said seal body into snug secondary sealing relation with said other of said machine elements.
Claim 4
Dependent Claim
94 words
A fluid seal as defined in claim 1 which one of said sealing lip portions includes a shoulder element adjacent the radially inner end of one of said lips thereof, said shoulder serving to reduce the axial extent of said outwardly directed seal body surface, said shoulder further including an axially directed, radially extending portion adapted to engage an inner margin of one of said sealing surfaces on said radial flange of said seal case element when said elastomeric seal body is being urged over said other machine element into a position of use.
Claim 5
Dependent Claim
68 words
A fluid seal as defined in claim 1 in which one of said sealing edges on said lip portion is a discontinuous edge, said edge being defined by a plurality of formations disposed on an inner surface of one of said lips, a portion of each of said formations being adapted to engage one of said sealing surfaces on said radial flange in the use of said seal.
Claim 6
Dependent Claim
51 words
A fluid seal as defined in claim 1 in which said mounting portion of said seal case is in the form of an axially extending flange having an edge adapted to engage a portion of said element for registering said seal in a desired position of use within said machine element.
Claim 7
Dependent Claim
47 words
A fluid seal as defined in claim 1 in which said radially inwardly directed portion of said elastomeric element includes a plurality of annular, circumferentially and radially inwardly extending ribs, said ribs being adapted to engage said other of said machine elements when said seal is installed.
Claim 8
Dependent Claim
29 words
A fluid seal as defined in claim 1 in which said auxially inner and outer lip portions each tapers to a reduced thickness at the radially outer portions thereof.
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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) | 1981-06-12 | 1981-12-12 | 1982-06-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-06-12 | 1985-12-12 | 1986-06-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-06-12 | 1989-12-12 | 1990-06-13 | $7700.00 | Window Closed / Lapsed |