US3802044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Controlled deflection roll
Assignee: Sulzer Escher Wyss AG
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Filing: 1972-06-27
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Granted: 1974-04-09
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Expires: 1992-06-27
Abstract
Abstract Roll with bending compensation, for pressure rolling of paper webs, having a rotatable shell, a stationary shaft and at least one pressure element arranged between shell and yoke; a hydrostatic bearing chamber between shell and pressure element, and a servomotor pressure chamber between pressure element and shaft; the servomotor chamber connected to a pressure medium conduit, and the bearing chamber connected to said conduit via a throttling arrangement; the piston of said servomotor being tiltably guided within the cylinder of said servomotor.
Inventors
- 👤 R Lehmann
- 👤 E Muehle
- 👤 W Spillmann
- 👤 A Christ
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:40
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; B; B65; B65H; B65H27/00; D; D21; D21G; D21G1/00; D21G1/02; D21G1/0206; D21G1/0213; D21G1/022; F16C13/028; B65H2404/00; B65H2404/10; B65H2404/11; B65H2404/111; B65H2404/1114; B65H2404/112; B65H2404/115; B65H2404/1152; B65H2404/13; B65H2404/137; B65H2404/1372
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
175 words
Roll with bending compensation, for the pressure treatment of webs of material, especially paper webs; said roll including a hollow cylindrical rotatable shell and a stationary yoke extending through said shell; a pressure medium supply condUit arranged in said yoke; at least one pressure element arranged between said shell and said yoke; a hydrostatic bearing provided between said shell and said pressure element, including a first pressure chamber; a servomotor provided between said pressure element and said yoke, including a piston, a cylinder and a second pressure chamber, for displacing said pressure element towards said shell; said second pressure chamber of said servomotor being connected to said pressure medium supply conduit; a throttling arrangement connecting said first pressure chamber of said hydrostatic bearing to said pressure medium conduit; the improvement that said piston of said servomotor is tiltably guided within said cylinder of said servomotor, said pressure element thus being held in the axial and peripheral direction of said roll but being otherwise mobile floating on said pressure medium situated in said second pressure chamber.
Claim 2
Dependent Claim
175 words
Roll with bending compensation, for the pressure treatment of webs of material, especially paper webs; said roll including a hollow cylindrical rotatable shell and a stationary yoke extending through said shell; a pressure medium supply condUit arranged in said yoke; at least one pressure element arranged between said shell and said yoke; a hydrostatic bearing provided between said shell and said pressure element, including a first pressure chamber; a servomotor provided between said pressure element and said yoke, including a piston, a cylinder and a second pressure chamber, for displacing said pressure element towards said shell; said second pressure chamber of said servomotor being connected to said pressure medium supply conduit; a throttling arrangement connecting said first pressure chamber of said hydrostatic bearing to said pressure medium conduit; the improvement that said piston of said servomotor is tiltably guided within said cylinder of said servomotor, said pressure element thus being held in the axial and peripheral direction of said roll but being otherwise mobile floating on said pressure medium situated in said second pressure chamber.
Claim 3
Dependent Claim
58 words
Roll according to claim 1, in which a partition sub-divides said first pressure chamber of said hydrostatic bearing into part-chambers situated adjacent one another with respect to the wall of said shell, said throttling arrangement connecting one of said part-chambers to said supply conduit; and another throttling arrangement connecting another one of said part-chambers to said supply conduit.
Claim 4
Dependent Claim
22 words
Roll according to claim 2, in which at least three of said part-chambers are arranged adjacent one another in two different directions.
Claim 5
Dependent Claim
31 words
Roll according to claim 1, in which said piston of said servomotor has a spherically rounded portion, and is tiltable in said cylinder about the centre of said spherically rounded portion.
Claim 6
Dependent Claim
49 words
Roll according to claim 1, in which said piston comprises a rim which is short in the axial direction of said piston; said rim guiding said piston in said cylinder, but, except of said rim, an intermediate space being provided between said piston and the wall of said cylinder.
Claim 7
Dependent Claim
53 words
Roll according to claim 1, in which said piston is cylindrical in form and said cylinder comprises a ring which is short in the axial direction of said cylinder; said ring guiding said piston in said cylinder, but, except of said ring, an intermediate space being provided between said piston and said cylinder.
Claim 8
Dependent Claim
45 words
Roll according to claim 1, in which the width of the pressure transmission surface effective between said shell and said pressure element is greater than the spacing between said pressure transmission surface and the centre of said tiltable guiding of said piston within said cylinder.
Claim 9
Dependent Claim
23 words
Roll according to claim 1, comprising; two or more of said pressure elements following each other in the peripheral direction of said roll.
Claim 10
Dependent Claim
55 words
Roll according to claim 1, in which two or more pressure elements are provided; at least one other pressure medium supply conduit arranged in said yoke; one of said pressure elements being connected to said pressure medium supply conduit, and another one of said pressure elements being connected to said other pressure medium supply conduit.
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) | 1977-04-08 | 1977-10-08 | 1978-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-04-08 | 1981-10-08 | 1982-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-04-08 | 1985-10-08 | 1986-04-09 | $7700.00 | Window Closed / Lapsed |