US3833273A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Labyrinth type seal
Assignee: Siemens Industry Inc
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Filing: 1973-07-30
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Granted: 1974-09-03
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Expires: 1993-07-30
Abstract
Abstract In a rolling mill, an interlocking labyrinth-type seal for a roll neck which is rotatably supported in a chock assembly. The seal includes an inner first sealing element which rotates with the roll neck, an outer second sealing element which is fixed in relation to the chock assembly, and a third sealing element which is carried on and movable axially along one or the other of the aforesaid first or second sealing elements. The sealing elements have axially and/or radially spaced flanges and surfaces which cooperate to define an interlocking sealing labyrinth for preventing the escape of lubricating oil from the bearing, while at the same time preventing the bearing and lubricating oil from becoming contaiminated with rolling lubricant cooling water, mill scale, dirt, etc.
Inventors
- 👤 S Rickley
- 👤 H Boghosian
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:58
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4476; F16J15/4478; B; B21; B21B; B21B31/00; B21B31/07; B21B31/078; F16C; F16C13/00; F16C13/02; F16C33/00; F16C33/72; F16C33/74; F16C2322/00; F16C2322/12
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
119 words
In a rolling mill, an interlocking labyrinth-type seal for a roll neck which is journalled for rotation in a chock assembly, said seal comprising: first and second sealing elements, one of said sealing elements being rotatable with the roll neck and the other being fixed relative to the chock assembly; flange means on one of said sealing elements; a third sealing element carried by the other of said sealing elements, said third sealing element having flange means cooperating with said first-mentioned flange means to establish an interlocking sealing labyrinth; and, means permitting axial movement of said third sealing element relative to said other sealing element to thereby accommodate axial movement of said roll neck relative to said chock assembly.
Claim 2
Dependent Claim
119 words
In a rolling mill, an interlocking labyrinth-type seal for a roll neck which is journalled for rotation in a chock assembly, said seal comprising: first and second sealing elements, one of said sealing elements being rotatable with the roll neck and the other being fixed relative to the chock assembly; flange means on one of said sealing elements; a third sealing element carried by the other of said sealing elements, said third sealing element having flange means cooperating with said first-mentioned flange means to establish an interlocking sealing labyrinth; and, means permitting axial movement of said third sealing element relative to said other sealing element to thereby accommodate axial movement of said roll neck relative to said chock assembly.
Claim 3
Dependent Claim
28 words
The seal as claimed in claim 1 wherein said first and second sealing elements are rigid, and wherein said third sealing element is molded of a flexible material.
Claim 4
Dependent Claim
21 words
The seal as claimed in claim 2 wherein said third sealing element is internally reinforced by an integrally embedded reinforcing element.
Claim 5
Dependent Claim
52 words
The seal as claimed in claim 1 further characterized by additional flange means on said first and second sealing elements, said flange means collectively defining an interlocking labyrinth having end sections separated by an intermediate section, said intermediate section being defined in part by the flange means on said third sealing element.
Claim 6
Dependent Claim
184 words
In a rolling mill, an interlocking labyrinth-type seal for a roll neck which is journalled for rotation in a chock assembly, said seal comprising: a first sealing element rotatable with the roll neck, said first sealing element having a cylindrical portion arranged coaxially with the rotational axis of the roll neck; a flexible sealing element carried by said first sealing element, said flexible sealing element having a generally U-shaped cross section formed by laterally spaced radially outwardly extending flanges joined by an intermediate base section which is in frictional engagement with and slidable along the length of said cylindrical portion; and, a second sealing element carried by the chock assembLy and fixed relative thereto, said second sealing element having an inwardly extending radial flange located between said outwardly extending flanges and cooperating therewith to establish an interlocking sealing labyrinth, the sliding relationship between the intermediate base section of said flexible sealing element and the cylindrical portion of said first sealing element being operative to maintain the effectiveness of said sealing labyrinth while permitting axial movement of said roll neck relative to said chock assembly.
Claim 7
Dependent Claim
184 words
In a rolling mill, an interlocking labyrinth-type seal for a roll neck which is journalled for rotation in a chock assembly, said seal comprising: a first sealing element rotatable with the roll neck, said first sealing element having a cylindrical portion arranged coaxially with the rotational axis of the roll neck; a flexible sealing element carried by said first sealing element, said flexible sealing element having a generally U-shaped cross section formed by laterally spaced radially outwardly extending flanges joined by an intermediate base section which is in frictional engagement with and slidable along the length of said cylindrical portion; and, a second sealing element carried by the chock assembLy and fixed relative thereto, said second sealing element having an inwardly extending radial flange located between said outwardly extending flanges and cooperating therewith to establish an interlocking sealing labyrinth, the sliding relationship between the intermediate base section of said flexible sealing element and the cylindrical portion of said first sealing element being operative to maintain the effectiveness of said sealing labyrinth while permitting axial movement of said roll neck relative to said chock assembly.
Claim 8
Dependent Claim
32 words
The apparatus as claimed in claim 5 further characterized by said roll neck being surrounded by a bearing sleeve which is rotatable therewith and to which said first sealing element is attached.
Claim 9
Dependent Claim
26 words
The apparatus as claimed in claim 5 wherein the intermediate base section of said flexible sealing element is reinforced by a cylindrical metallic member embedded therein.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-02 | 1978-03-04 | 1978-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-02 | 1982-03-04 | 1982-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-02 | 1986-03-04 | 1986-09-03 | $7700.00 | Window Closed / Lapsed |