US4363490A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crown roll seal arrangement sealed by lubricating oil in labyrinth
Assignee: Voith Paper Ltd
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Filing: 1980-09-26
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Granted: 1982-12-14
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Expires: 2000-09-26
Abstract
Abstract A non-contact seal for the ends of a variable crown calender roll shaft subject to variations in shaft alignment. The seal is a labyrinthian type with a suction system adapted to a sump to recycle the oil. The oil level is maintained and contact between the rotating shaft and the labyrinthian seal is avoided, permitting higher temperature and higher speed use of the roll apparatus.
Inventors
- 👤 Howard E. Kuehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:43
CPC Classifications
F; F16; F16N; F16N19/00; F16N19/006; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C33/00; F16C33/30; F16C33/66; F16C33/6637; F16C33/6659; F16C33/6666; F16C33/6685; F16C33/72; F16C33/76; F16C33/80; F16C19/00; F16C19/22; F16C19/34; F16C19/38; Y; Y10; Y10S; Y10S277/00; Y10S277/907
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
93 words
A seal arrangement for a calender roll comprising: a stationary roll shaft; a roll shell rotatively journalled in a bearing at each end about said roll shaft; a fluid passageway for permitting said bearings to receive lubricating fluid from a lubricating chamber; a labyrinthian non-contact seal arranged on the outer side of said bearings on said shaft between said shaft and said roll shell; and a fluid discharge system for maintaining a predetermined level of lubricating fluid about said bearings in said chamber and preventing passage of excess fluid through said labyrinthian seal.
Claim 2
Dependent Claim
93 words
A seal arrangement for a calender roll comprising: a stationary roll shaft; a roll shell rotatively journalled in a bearing at each end about said roll shaft; a fluid passageway for permitting said bearings to receive lubricating fluid from a lubricating chamber; a labyrinthian non-contact seal arranged on the outer side of said bearings on said shaft between said shaft and said roll shell; and a fluid discharge system for maintaining a predetermined level of lubricating fluid about said bearings in said chamber and preventing passage of excess fluid through said labyrinthian seal.
Claim 3
Dependent Claim
32 words
A seal arrangement for a calender roll as recited in claim 1, wherein said labyrinthian seal comprises at least one radially directed flange spaced between said roll shaft and said roll shell.
Claim 4
Dependent Claim
36 words
A seal arrangement for a calender roll as recited in claim 1, wherein said fluid discharge system comprises a suction pipe arranged near said bearing and disposed at a particular level to withdraw lubricating fluid thereabove.
Claim 5
Dependent Claim
47 words
A seal arrangement for a calender roll as recited in claim 3, wherein said fluid discharge system comprises a conduit which is in fluid communication with said suction pipe and a suction pump, wherein said lubricating fluid may be recycled to eventually flow through said bearings repeatedly.
Claim 6
Dependent Claim
50 words
A seal arrangement for a calender roll as recited in claim 3, including an end cap comprising a portion of said labyrinthian seal, wherein said end cap has a drain plug at its lowermost portion to facilitate discharge of any excess lubricating fluid which may have traversed said labyrinthian seal.
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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) | 1985-12-13 | 1986-06-14 | 1986-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-13 | 1990-06-14 | 1990-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-13 | 1994-06-14 | 1994-12-14 | $7700.00 | Window Closed / Lapsed |