US3854732A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sealing arrangement
Assignee: Carl Freudenberg KG
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Filing: 1972-01-11
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Granted: 1974-12-17
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Expires: 1992-01-11
Abstract
Abstract A propeller shaft sleeve surrounds a propeller shaft with clearance, the propeller shaft rotating in the sleeve. A sealing unit is accommodated in the space between the propeller and the sleeve to seal this space and includes an annular sealing member which engages with radially directed sealing edges the inside of the sleeve and the outside of the propeller shaft and one of whose axial ends is subject to higher and the other of whose ends is subjected to lower fluid pressure. A circumferentially extending contact face is provided on the sealing member at the other axial end thereof in the region of the sealing edge which engages the propeller shaft. The contact face is cylindrical or slightly conical and may be continuous or discontinuous, being in engagement with the propeller shaft via an interposed film of lubricating fluid.
Inventors
- 👤 D Franz
- 👤 W Schmitt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
B; B63; B63H; B63H23/00; B63H23/32; B63H23/36; F; F16; F16J; F16J15/00; F16J15/16; F16J15/32; F16J15/3204; F16J15/322; F16J15/324; B63H23/321; B63H2023/327; Y; Y10; Y10S; Y10S277/00; Y10S277/935; Y10S277/944
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
178 words
A sealing arrangement comprising, in combination, a first member, and a second member surrounded by said first member, one of said members being rotatable relative to the other and said members being lubricated by a flow of lubricating fluid directed at their interface along said one member axially of the same; at least one annular sealing member received between said first and second members and having radially directed sealing edges respectively engaging the same, said sealing member also having oppositely directed axial ends one of which is subject to higher and the other of which is subject to lower ambient fluid pressure, and a circumferential surface provided with engaging portions of a material having low coefficient of friction and high resistance to wear; and a circumferentially extending contact face provided on said circumferential surface of said sealing member at said other axial end in the region of one of said sealing edges, said contact face being of at least approximately cylindrical outline and being in engagement with said one member via an interposed film of said lubricating fluid.
Claim 2
Dependent Claim
178 words
A sealing arrangement comprising, in combination, a first member, and a second member surrounded by said first member, one of said members being rotatable relative to the other and said members being lubricated by a flow of lubricating fluid directed at their interface along said one member axially of the same; at least one annular sealing member received between said first and second members and having radially directed sealing edges respectively engaging the same, said sealing member also having oppositely directed axial ends one of which is subject to higher and the other of which is subject to lower ambient fluid pressure, and a circumferential surface provided with engaging portions of a material having low coefficient of friction and high resistance to wear; and a circumferentially extending contact face provided on said circumferential surface of said sealing member at said other axial end in the region of one of said sealing edges, said contact face being of at least approximately cylindrical outline and being in engagement with said one member via an interposed film of said lubricating fluid.
Claim 3
Dependent Claim
17 words
A sealing arrangement as defined in claim 1, wherein said material of said engaging portion is polyamide.
Claim 4
Dependent Claim
51 words
A sealing arrangement as defined in claim 1, wherein said one member is a ship''s propeller shaft and the other of said first and second members is a propeller shaft sleeve surrounding said propeller shaft; and further comprising additional ones of said sealing members interposed between said first and second members.
Claim 5
Dependent Claim
47 words
A sealing arrangement as defined in claim 3, wherein said sealing members are lip seals having mounting flanges; and wherein the mounting flange of at least one of said lip seals has flange surfaces extending transversely to said axis of rotation and diverging in radially outward direction.
Claim 6
Dependent Claim
57 words
A sealing arrangement as defined in claim 4; further comprising flange mounting means for said one lip seal, including a stationary component and a movable component slidable axially of said first and second members and being arrestable at a selectable axial distance from said first component, said mounting means having abutment surfaces corresponding to said flange surfaces.
Claim 7
Dependent Claim
20 words
A sealing arrangement as defined in claim 5; and further comprising spacer disks interposable between said first and second components.
Claim 8
Dependent Claim
44 words
A sealing arrangement as defined in claim 3, said sealing members having respective radially outer regions, and wherein at least one of said sealing members includes two recesses intermediate its radially outer region and an adjacent contact face proximal to said radially outer region.
Claim 9
Dependent Claim
176 words
A sealing arrangement comprising, in combination, a first member, and a second member surrounded by said first member, one of said members being rotatable relative to the other and said members being lubricated by a flow of lubricating fluid directed at their interface along said one member axially of the same; at least one annular sealing member received between said first and second members and having radially directed sealing edges respectively engaging the same, said sealing member having oppositely directed axial ends one of which is subject to higher and the other of which is subject to lower ambient fluid pressure; a circumferentially extending contact face provided on said sealing member at said other axial end in the region of one of said sealing edges, said contact face being of at least approXimately cylindrical outline and being in engagement with said one member via an interposed film of said lubricating fluid; and a mounting element having rigid inner and outer sections and being delimited in cross-sectional view by surfaces having substantially uniformly spaced curved contour lines.
Claim 10
Dependent Claim
176 words
A sealing arrangement comprising, in combination, a first member, and a second member surrounded by said first member, one of said members being rotatable relative to the other and said members being lubricated by a flow of lubricating fluid directed at their interface along said one member axially of the same; at least one annular sealing member received between said first and second members and having radially directed sealing edges respectively engaging the same, said sealing member having oppositely directed axial ends one of which is subject to higher and the other of which is subject to lower ambient fluid pressure; a circumferentially extending contact face provided on said sealing member at said other axial end in the region of one of said sealing edges, said contact face being of at least approXimately cylindrical outline and being in engagement with said one member via an interposed film of said lubricating fluid; and a mounting element having rigid inner and outer sections and being delimited in cross-sectional view by surfaces having substantially uniformly spaced curved contour lines.
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) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |