US3746351A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial shaft seal with positively retained garter spring
Assignee: Chicago Rawhide Manufacturing Co Inc
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Filing: 1971-07-19
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Granted: 1973-07-17
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Expires: 1991-07-19
Abstract
Abstract A radially acting shaft seal having associated therewith a garter spring which is at least partially confined within a spring-retaining groove formed in the primary sealing lip by radially spaced-apart tabs or fingers extending axially outwardly from an inner rigid support element. The invention reduces or eliminates the tendency of the garter spring to ''''pop out'''' without substantially decreasing the tolerance of the seal assembly to radial run-out. In addition, seals of the present invention utilize relatively shallow spring-retaining grooves with the result that the sealing element is less likely to suffer damage upon separation from the mold.
Inventors
- 👤 A Tucker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:10
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/3208; F16J15/3212
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
149 words
A shaft seal unit comprises, in combination, a relatively flexible sealing element and a relatively rigid casing element, said resilient sealing element including at least one lip portion adapted to form a primary seal with an associated, relatively movable element, means in said sealing element for receiving a circumferentially extending, radially acting garter spring, said receiving means being disposed in substantial radial alignment with said one lip, and a spring disposed within said receiving means, said casing including a mounting flange portion adapted to be received within a machine member, and a seal element bonding portion with at least one margin thereof bonded to said sealing element, said rigid casing element also having a spring retaining portion thereof extending substantially axIally and disposed in a closely radially spaced apart relation to said garter spring, with the remainder of said rigid casing element being axially spaced from said sealing element.
Claim 2
Dependent Claim
149 words
A shaft seal unit comprises, in combination, a relatively flexible sealing element and a relatively rigid casing element, said resilient sealing element including at least one lip portion adapted to form a primary seal with an associated, relatively movable element, means in said sealing element for receiving a circumferentially extending, radially acting garter spring, said receiving means being disposed in substantial radial alignment with said one lip, and a spring disposed within said receiving means, said casing including a mounting flange portion adapted to be received within a machine member, and a seal element bonding portion with at least one margin thereof bonded to said sealing element, said rigid casing element also having a spring retaining portion thereof extending substantially axIally and disposed in a closely radially spaced apart relation to said garter spring, with the remainder of said rigid casing element being axially spaced from said sealing element.
Claim 3
Dependent Claim
44 words
A shaft seal unit as defined in claim 1 wherein said casing member includes at least two elements, and wherein said bonding portion is formed from one of said elements and wherein said spring retaining portion is formed from the other of said elements.
Claim 4
Dependent Claim
42 words
A shaft seal unit as defined in claim 1 wherein said seal unit is a radially inwardly acting seal, and wherein said spring retaining portion comprises a plurality of tabs spaced circumferentially about said casing and lying radially outwardly of said spring.
Claim 5
Dependent Claim
185 words
A fluid seal assembly for mounting between relatively movable first and second parts, and for retaining a fluid within an enclosed region, said seal assembly including a rigid annular casing member and an annular elastomeric seal-forming member bonded to a portion thereof, said elastomeric member comprising an axially extending portion having radially inner and radially outer surfaces, said axially extending portion including a radially extending portion extending from one of said surfaces and adapted to form a primary seal with said first part, said axially extending portion including a recess extending radially into the other of said surfaces adjacent said radially extending portion, garter spring means disposed in said recess for urging said radially extending portion radially against said first part, said casing member including means for forming a fluid-tight seal between a portion of said casing and said second part, and first and second radially extending legs, both of said legs being axially spaced from said spring, and at least one of said legs including a plurality of axially extending spring retainer portions disposed in closely radially spaced apart relation to said spring means.
Claim 6
Dependent Claim
185 words
A fluid seal assembly for mounting between relatively movable first and second parts, and for retaining a fluid within an enclosed region, said seal assembly including a rigid annular casing member and an annular elastomeric seal-forming member bonded to a portion thereof, said elastomeric member comprising an axially extending portion having radially inner and radially outer surfaces, said axially extending portion including a radially extending portion extending from one of said surfaces and adapted to form a primary seal with said first part, said axially extending portion including a recess extending radially into the other of said surfaces adjacent said radially extending portion, garter spring means disposed in said recess for urging said radially extending portion radially against said first part, said casing member including means for forming a fluid-tight seal between a portion of said casing and said second part, and first and second radially extending legs, both of said legs being axially spaced from said spring, and at least one of said legs including a plurality of axially extending spring retainer portions disposed in closely radially spaced apart relation to said spring means.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-16 | 1977-01-15 | 1977-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-16 | 1981-01-15 | 1981-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-16 | 1985-01-15 | 1985-07-17 | $7700.00 | Window Closed / Lapsed |