US4404724A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic support element, especially for a controlled deflection roll
Assignee: Sulzer Escher Wyss AG
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Filing: 1981-03-09
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Granted: 1983-09-20
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Expires: 2001-03-09
Abstract
Abstract A hydrostatic support or pressure element, especially for a controlled deflection roll, comprising a sealing or closing ledge having a sealing surface which closes a gap between a plunger of the support element and the supported part in a manner such that mixed friction prevails at the sealing surface of the sealing ledge. The sealing surface has a width which at most amounts to ten or five millimeters, respectively. The hydraulically effective surface of the plunger, producing a contact or press force for the sealing surface, is equal to a surface whose boundary line extends within the sealing surface, and specifically, preferably at a distance of 0.2 to 0.5-fold of the width of the sealing surface from the inner edge of the sealing surface.
Inventors
- 👤 Alfred Christ
- 👤 Johann Miesch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:37
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C13/028; B; B30; B30B; B30B5/00; B30B5/04; B30B5/06; B30B5/062; F16C32/00; F16C32/06; F16C32/0662; F16C32/0666; F16J; F16J15/00; F16J15/16; F16J15/32
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
267 words
A hydrostatic support element, especially for a controlled deflection roll, for supporting a supported part upon a supporting part, comprising: a plunger member movable at the supporting part in a predetermined displacement direction; said plunger member coacting with the supporting part for enclosing a hydrostatic pressure chamber to which there is infed a pressurized fluid medium; said supported part having a running surface; the pressurized fluid medium acting directly upon the running surface of the supported part; said plunger member possessing a closure ledge surrounding the pressure chamber; said closure ledge having a surface coacting with the running surface of the supported part; said surface comprising a sealing surface of a sealing ledge and measured in the direction of pressure gradient of the pressurized fluid medium having a width which does not exceed 7 mm; said plunger member possessing a groove; said sealing ledge being inserted into said groove; said plunger member having hydraulically effective surface means of a dimension such as to determine the force by means of which the sealing surface of the sealing ledge is pressed against the running surface of the supported part; the size of the hydraulically effective surface means of the plunger member being chosen such that there is formed a contact force which is just sufficient in order to permit a predetermined low escape of the pressurized fluid medium between the sealing surface of the sealing ledge and the running surface of the supported part; and a sealing means between the plunger member and the sealing ledge along an inner surface of the sealing ledge which confronts the pressure chamber.
Claim 2
Dependent Claim
267 words
A hydrostatic support element, especially for a controlled deflection roll, for supporting a supported part upon a supporting part, comprising: a plunger member movable at the supporting part in a predetermined displacement direction; said plunger member coacting with the supporting part for enclosing a hydrostatic pressure chamber to which there is infed a pressurized fluid medium; said supported part having a running surface; the pressurized fluid medium acting directly upon the running surface of the supported part; said plunger member possessing a closure ledge surrounding the pressure chamber; said closure ledge having a surface coacting with the running surface of the supported part; said surface comprising a sealing surface of a sealing ledge and measured in the direction of pressure gradient of the pressurized fluid medium having a width which does not exceed 7 mm; said plunger member possessing a groove; said sealing ledge being inserted into said groove; said plunger member having hydraulically effective surface means of a dimension such as to determine the force by means of which the sealing surface of the sealing ledge is pressed against the running surface of the supported part; the size of the hydraulically effective surface means of the plunger member being chosen such that there is formed a contact force which is just sufficient in order to permit a predetermined low escape of the pressurized fluid medium between the sealing surface of the sealing ledge and the running surface of the supported part; and a sealing means between the plunger member and the sealing ledge along an inner surface of the sealing ledge which confronts the pressure chamber.
Claim 3
Dependent Claim
22 words
The hydrostatic support element as defined in claim 1, wherein: said sealing surface has a width which does not exceed 5 mm.
Claim 4
Dependent Claim
97 words
The hydrostatic support element as defined in claim 1, wherein: said plunger member possesses a substantially cylindrical guide surface; said sealing ledge having a substantially ring-shaped sealing surface; the diameter of the guide surface which governs said hydraulically effective surface means is essentially equal to the diameter of a substantially circular-shaped line extending through the sealing surface and arranged coaxially with respect to such sealing surface; and said circular-shaped line extending from an inner edge of the sealing surface which confronts the pressure chamber at a distance of 0.2 to 0.5-fold the width of the sealing surface.
Claim 5
Dependent Claim
39 words
The support element as defined in claim 1, wherein: said sealing ledge is provided with an elastic element at its end located in said groove; and said elastic element being effective in the displacement direction of the plunger member.
Claim 6
Dependent Claim
25 words
The hydrostatic support element as defined in claim 1, wherein: said sealing ledge possesses an inner substantially conical surface having an upwardly directed cone tip.
Claim 7
Dependent Claim
43 words
The hydrostatic support element as defined in claim 1, further including: a partition wall for separating the pressure chamber of the plunger member into two parts; and said partition wall having a throttle bore which flow communicates both parts of said pressure chamber.
Claim 8
Dependent Claim
37 words
The hydrostatic support element as defined in claim 1, further including: a spring arranged between the supporting part and the plunger member; and said spring pressing the plunger member against the running surface of the supported part.
Claim 9
Dependent Claim
65 words
The hydrostatic support element as defined in claim 1, wherein: said hydrostatic support element is arranged at a roll support of a controlled deflection roll; said roll support constituting said supporting part; said sealing surface coacting with an inner cylindrical surface of a roll shell of the controlled deflection roll which is rotatable about the roll support; and said roll shell constituting said supported part.
Claim 10
Dependent Claim
31 words
The hydrostatic support element as defined in claim 1, wherein: said sealing ledge is formed of a plastic material which is temperature resistant and possesses good running properties with marginal lubrication.
Claim 11
Dependent Claim
51 words
The hydrostatic support element as defined in claim 1, wherein: said hydrostatic support element is used in conjunction with a heated controlled deflection roll to minimize the amount of said pressurized fluid medium which comes into contact with a heated fluid medium used for heating of the heated controlled deflection roll.
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) | 1986-09-19 | 1987-03-21 | 1987-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-19 | 1991-03-21 | 1991-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-19 | 1995-03-21 | 1995-09-20 | $7700.00 | Window Closed / Lapsed |