Patent US3827703A successfully refreshed from Google Patents.
US3827703A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radial shaft seal with positive garter spring retention
Assignee: Chicago Rawhide Manufacturing Co Inc
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Filing: 1971-07-23
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Granted: 1974-08-06
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Expires: 1991-07-23
Abstract
Abstract A shaft seal having a radially acting garter spring disposed in a relatively shallow spring-retaining groove which extends radially from one side wall of a relatively narrow, axially extending annular recess in the elastomeric body portion of the seal unit. The invention substantially reduces or eliminates ''''pop-out'''' of the garter spring, without diminishing the tolerance of the seal to radial run-out. In addition, seals of the present invention are able to be made by a method which reduces or eliminates the incidence of actual or potential splits in the outer wall of the spring-retaining groove, which in the prior art, resulted from excessive seal distortion occurring in newly formed seals during axial separation of the mold parts.
Inventors
- 👤 R Brink
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:34
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/328; F16J15/3204; F16J15/3208; F16J15/3212; Y; Y10; Y10S; Y10S277/00; Y10S277/924
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
245 words
A shaft seal assembly for mounting between relatively movable first and second parts, and for retaining a fluid within a region to be sealed, said assembly including a relatively rigid casing element haVing a portion adapted for sealing engagement with said first part and a radially extending portion having a margin for receiving a portion of a seal body, and a seal body including a mounting portion bonded to said casing element margin, a primary lip portion having a seal band area defined by the convergence of a pair of frustoconical surfaces, an annular spring received within a spring-receiving groove formed within said body such that said spring is substantially radially aligned with said seal band area, and a radially flexible connecting portion extending between said primary lip portion and said mounting portion, whereby said seal band is substantially axially offset from said casing element margin, with one surface of said connecting portion overlying said spring, and a spring-receiving opening defined between said one surface and a portion of said spring receiving groove, said opening being directed axially away from the region being sealed and generally toward said casing element margin, said seal body further including a secondary lip portion, said secondary lip portion being formed as a continuation of said primary lip portion and extending radially and axially away from said spring receiving groove, said secondary lip portion also including a seal band portion defined by the convergence of a pair of frustoconical surfaces.
Claim 2
Dependent Claim
245 words
A shaft seal assembly for mounting between relatively movable first and second parts, and for retaining a fluid within a region to be sealed, said assembly including a relatively rigid casing element haVing a portion adapted for sealing engagement with said first part and a radially extending portion having a margin for receiving a portion of a seal body, and a seal body including a mounting portion bonded to said casing element margin, a primary lip portion having a seal band area defined by the convergence of a pair of frustoconical surfaces, an annular spring received within a spring-receiving groove formed within said body such that said spring is substantially radially aligned with said seal band area, and a radially flexible connecting portion extending between said primary lip portion and said mounting portion, whereby said seal band is substantially axially offset from said casing element margin, with one surface of said connecting portion overlying said spring, and a spring-receiving opening defined between said one surface and a portion of said spring receiving groove, said opening being directed axially away from the region being sealed and generally toward said casing element margin, said seal body further including a secondary lip portion, said secondary lip portion being formed as a continuation of said primary lip portion and extending radially and axially away from said spring receiving groove, said secondary lip portion also including a seal band portion defined by the convergence of a pair of frustoconical surfaces.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-05 | 1978-02-04 | 1978-08-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-05 | 1982-02-04 | 1982-08-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-05 | 1986-02-04 | 1986-08-06 | $7700.00 | Window Closed / Lapsed |