Patent US1873859A successfully refreshed from Google Patents.
US4014555A
Expired / Lapsed
US
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Hydrostatic sealing device
Assignee: Individual
•
Filing: 1976-02-03
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Granted: 1977-03-29
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Expires: 1996-02-03
Abstract
Abstract Disclosed is a hydrostatic sealing device for utilization of a high pressure fluid in providing a low friction seal for rotating or sliding parts. High pressure fluid is utilized to balance a piston-actuated seal against the rotating or sliding part with a low pressure section to remove leakage.
Inventors
- 👤 Jean Louis Jacottet
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:19
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/56; F16J15/16; F16J15/40; F16J15/44; F16J15/441; Y; Y10; Y10S; Y10S277/00; Y10S277/908
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
168 words
In a hydrostatic sealing device which effects a seal by means of a high pressure acting upon surfaces which are in mutual contact and perform relative motions, said device comprising at least one segment split into a certain number of elements having lateral faces, said elements bearing against one another through flat surfaces contained in axial planes, when the contacting surfaces are cylindrical, and contained in mutually parallel planes when the contacting surfaces are flat, said elements being individually hydrostatically balanced, both in relation to the direction of relative motion between the surfaces which are in contact with each other, and in relation to the direction perpendicular thereto, an improvement characterized in that in the direction perpendicular to the direction of motion, that face of the element which is opposite to the surface that is in contact, is subjected to the action of a piston in communication with said high pressure whose area of contact with said opposite surface is isolated from the high pressure by a seal.
Claim 2
Dependent Claim
168 words
In a hydrostatic sealing device which effects a seal by means of a high pressure acting upon surfaces which are in mutual contact and perform relative motions, said device comprising at least one segment split into a certain number of elements having lateral faces, said elements bearing against one another through flat surfaces contained in axial planes, when the contacting surfaces are cylindrical, and contained in mutually parallel planes when the contacting surfaces are flat, said elements being individually hydrostatically balanced, both in relation to the direction of relative motion between the surfaces which are in contact with each other, and in relation to the direction perpendicular thereto, an improvement characterized in that in the direction perpendicular to the direction of motion, that face of the element which is opposite to the surface that is in contact, is subjected to the action of a piston in communication with said high pressure whose area of contact with said opposite surface is isolated from the high pressure by a seal.
Claim 3
Dependent Claim
37 words
A device as claimed in claim 1, wherein said device further includes spring means for providing a mechanical pressure so that the segmental element remains pressed against the contacting surface in the absence of any high pressure.
Claim 4
Dependent Claim
66 words
A device as claimed in claim 1, characterised in that in the axial direction, one of the lateral faces of the segmental element upon which said high pressure act is balanced by the pressure which acts upon the opposite face, with the exception of a central portion of said face which is sealed in relation to the high pressure by a seal surrounding said central portion.
Claim 5
Dependent Claim
26 words
A device as claimed in claim 3, wherein said improvement further includes a passage for discharging residual leakage opens to the interior of said central portion.
Claim 6
Dependent Claim
14 words
A device as claimed in claim 4, wherein said passage is radial in direction.
Claim 7
Dependent Claim
37 words
A device as claimed in claim 1, characterised in that at least one pair of two identical segments is used, the corresponding elements of which act at either side of one and the same area of action.
Claim 8
Dependent Claim
32 words
A device as claimed in claim 6, characterised in that between the two contacting surfaces of the two elements of the pair, a passage for the discharge of residual leakage is provided.
Claim 9
Dependent Claim
22 words
A device as claimed in claim 6, wherein said high pressure is a high pressure oil supplied to said area of action.
Claim 10
Dependent Claim
22 words
A device as claimed in claim 1, in combination with a jack, for sealing the high pressure in each direction of motion.
Claim 11
Dependent Claim
19 words
A device as claimed in claim 9, wherein said sealing is improved by the use of a supplementary segment.
Claim 12
Dependent Claim
39 words
A device as claimed in claim 9, wherein said jack includes a rod movably exiting from said jack, a further supplementary segment being used to seal the point of exit of the rod from the body of the jack.
Claim 13
Dependent Claim
34 words
A device as claimed in claim 9, wherein said jack includes a rod movably exiting from said jack, a seal is utilized to reduce leakage, and a suction line draws off any residual leakage.
Claim 14
Dependent Claim
32 words
A hydrostatic sealing device of the type adapted to feed high pressure sealing fluid between surfaces in sliding or rotating sealing engagement, said device including: a source of high pressure; a shaft;
Claim 15
Dependent Claim
32 words
A hydrostatic sealing device of the type adapted to feed high pressure sealing fluid between surfaces in sliding or rotating sealing engagement, said device including: a source of high pressure; a shaft;
Claim 16
Dependent Claim
63 words
at least one non-rotatable sealing ring, disposed around said shaft, said ring split into at least two floating elements bearing against one another through radially-extending sealing faces, each element having two opposite radially-extending faces hydrostatically balanced in an axial direction and having a cylindrical sealing surface and an opposite axially-extending surface hydrostatically balanced in a radial direction by said source of high pressure.
Claim 17
Dependent Claim
63 words
at least one non-rotatable sealing ring, disposed around said shaft, said ring split into at least two floating elements bearing against one another through radially-extending sealing faces, each element having two opposite radially-extending faces hydrostatically balanced in an axial direction and having a cylindrical sealing surface and an opposite axially-extending surface hydrostatically balanced in a radial direction by said source of high pressure.
Claim 18
Dependent Claim
39 words
A sealing device as set forth in claim 13, including passage means delivering the high pressure fluid to said cylindrical sealing surfaces of each element, and intercommunicating between said cylindrical surface and the opposite axially-extending surface of said element.
Claim 19
Dependent Claim
29 words
A sealing device as set forth in claim 14, wherein said device further includes seal means for isolating a portion of said opposite axially-extending surface from said high pressure.
Claim 20
Dependent Claim
32 words
A sealing device as set forth in claim 15, wherein said seal means includes means for equalizing the effects of the high pressure on said cylindrical surface and said opposite axially-extending surface.
References Cited (Backward Citations)
US3021146A
Cited
US3334905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-03-28 | 1980-09-27 | 1981-03-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-28 | 1984-09-27 | 1985-03-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-28 | 1988-09-27 | 1989-03-29 | $7700.00 | Window Closed / Lapsed |