Patent US4558781A successfully refreshed from Google Patents.
Patent US3561775A successfully refreshed from Google Patents.
US3561775A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing device comprising an o-ring
Assignee: Danfoss AS
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Filing: 1968-05-17
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Granted: 1971-02-09
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Expires: 1988-05-17
Abstract
Abstract A sealing device comprises a component encircling a shaft with the component having a steeped circular groove coaxial with the shaft. The deeper portion of the groove is closer to the surface of the shaft than the shallower portion and the edge of the step defining the two portions is located at a distance from the surface of the shaft that is greater than the radius but smaller than the diameter of an O-ring received in the groove. Means are provided for leading the O-ring against the edge of the step and roll into the deeper portion of the groove thus effecting a seal between the component and the shaft.
Inventors
- 👤 Leif V Sturlason
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:23
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/34; F16J15/38; Y; Y10; Y10S; Y10S277/00; Y10S277/91
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
193 words
A sealing device for sealing a shaft comprising, a rotatably driven shaft, a component encircling said shaft having an annular stepped open groove coaxial with said shaft and having a minor diameter and a major diameter, means defining a shoulder in said groove having an edge dividing said groove into a portion having the minor diameter and a portion having the major diameter, a deformable O-ring disposed circumferentially of said shaft, said edge being located at a distance radially from the surface of said shaft greater than a radius of a circular cross section of said O-ring and less than the diameter of said circular cross section of the O-ring, said portion of said groove having a major diameter being open to receive therein said O-ring, loading means disposed to press said O-ring axially in a direction into the last-mentioned portion of said groove against said edge so that said edge provides an annular pivot and said O-ring tends to seek to roll into said groove portion having the minor diameter and effects an annular fluid tight seal area on said component and an annular fluid tight seal area circumferentially of said shaft.
Claim 2
Dependent Claim
193 words
A sealing device for sealing a shaft comprising, a rotatably driven shaft, a component encircling said shaft having an annular stepped open groove coaxial with said shaft and having a minor diameter and a major diameter, means defining a shoulder in said groove having an edge dividing said groove into a portion having the minor diameter and a portion having the major diameter, a deformable O-ring disposed circumferentially of said shaft, said edge being located at a distance radially from the surface of said shaft greater than a radius of a circular cross section of said O-ring and less than the diameter of said circular cross section of the O-ring, said portion of said groove having a major diameter being open to receive therein said O-ring, loading means disposed to press said O-ring axially in a direction into the last-mentioned portion of said groove against said edge so that said edge provides an annular pivot and said O-ring tends to seek to roll into said groove portion having the minor diameter and effects an annular fluid tight seal area on said component and an annular fluid tight seal area circumferentially of said shaft.
Claim 3
Dependent Claim
21 words
A sealing device according to claim 1, in which said major diameter is greater than the overall diameter of said O-ring.
Claim 4
Dependent Claim
31 words
A sealing device according to claim 2, in which said portion of the groove having the minor diameter is axially deeper than the portion of the groove having the major diameter.
Claim 5
Dependent Claim
60 words
A sealing device according to claim 1, wherein said groove and said O-ring are relatively proportioned so that a line connecting said edge of said shoulder and the center of the solid portion of said O-ring forms an angle with the axis of the shaft that is equal to or greater than 45* but less than or equal to 60*.
Claim 6
Dependent Claim
55 words
A sealing device according to claim 1, wherein said loading means comprise a spring-loaded plate disposed so as to bear against said O-ring and wherein portions of said component are disposed cooperate with plate to act act as stop means limiting the axial travel of the spring loaded plate in a direction toward said O-ring.
Claim 7
Dependent Claim
49 words
A sealing device according to claim 1, wherein said groove and said O-ring are relatively proportioned so that a line connecting said edge of said shoulder and the center of the solid portion of said O-ring forms an included angle with the axis of said shaft that is acute.
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) | 1974-02-08 | 1974-08-10 | 1975-02-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-08 | 1978-08-10 | 1979-02-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-08 | 1982-08-10 | 1983-02-09 | $7700.00 | Window Closed / Lapsed |