US3879827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roll for a rolling mill
Assignee: Sulzer Escher Wyss AG
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Filing: 1974-06-10
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Granted: 1975-04-29
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Expires: 1994-06-10
Abstract
Abstract The space between the shell and bearer is subdivided and sealed off in a region about the hydrostatic supporting elements in order to contain a bath of the hydraulic medium. The sealed space communicates via a discharge pipe to the exterior and a throttle is installed in the pipe to effect a predetermined back pressure in the bath of hydraulic medium.
Inventors
- 👤 Rolf Lehmann
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 12:21
CPC Classifications
B; B21; B21B; B21B27/00; B21B27/02; B21B27/03; B21B27/05; B21B27/055; D; D21; D21G; D21G1/00; D21G1/02; D21G1/0206; D21G1/0213; D21G1/022; F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C13/028
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
149 words
A roll for a rolling mill comprising a rotatable cylindrical shell; a fixed bearer within said shell and defining an intermediate space therewith; a plurality of hydrostatic supporting elements movably mounted in said bearer to support said shell on said bearer, said elements each having at least one surface facing a surface of said shell; at least one source of hydraulic pressurized medium connected to said elements to press said elements against said shell and simultaneously lubricate said surfaces of said elements and said shell; means for sealing a region of said intermediate space between said shell and said bearer and surrounding said elements from the remainder of said space; a discharge pipe communicating said region with the exterior of said roll to expel hydraulic medium from said region; and a throttle member in said discharge pipe for setting a predetermined back-pressure in the hydraulic medium in said region.
Claim 2
Dependent Claim
149 words
A roll for a rolling mill comprising a rotatable cylindrical shell; a fixed bearer within said shell and defining an intermediate space therewith; a plurality of hydrostatic supporting elements movably mounted in said bearer to support said shell on said bearer, said elements each having at least one surface facing a surface of said shell; at least one source of hydraulic pressurized medium connected to said elements to press said elements against said shell and simultaneously lubricate said surfaces of said elements and said shell; means for sealing a region of said intermediate space between said shell and said bearer and surrounding said elements from the remainder of said space; a discharge pipe communicating said region with the exterior of said roll to expel hydraulic medium from said region; and a throttle member in said discharge pipe for setting a predetermined back-pressure in the hydraulic medium in said region.
Claim 3
Dependent Claim
30 words
A roll as set forth in claim 1 wherein said elements are disposed with an axis of each in a common plane and said region is symmetrical with said plane.
Claim 4
Dependent Claim
37 words
A roll as set forth in claim 1 which further comprises means for effecting a greater pressure-applying load on said elements in the middle of said bearer than on said elements at each end of said bearer.
References Cited (Backward Citations)
US2908964A
Cited
US3119324A
Cited
US3703862A
Cited
US3581359A
Cited
US3757398A
Cited
US3747181A
Cited
US3802044A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |