US3846883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roller for a pressure treatment of webs
Assignee: Sulzer Escher Wyss AG
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Filing: 1973-09-17
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Granted: 1974-11-12
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Expires: 1993-09-17
Abstract
Abstract In order to avoid friction in the transmission of the flexure compensating forces via the piston and bearing shoe units, a chamber is formed between the bearing shoe and piston to receive a pressure medium for partially relieving the joint between the bearing shoe and piston of load. An annular seal is also provided between the bearing shoe and piston in the plane of the pivot point of the joint to seal the relief pressure chamber.
Inventors
- 👤 M Biondetti
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:12
CPC Classifications
F; F16; F16C; F16C13/00; F16C13/02; F16C13/022; F16C13/024; F16C13/026; F16C13/028; D; D21; D21G; D21G1/00; D21G1/02; D21G1/0206; D21G1/0213; D21G1/022
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
142 words
A roller for pressure treatment of webs comprising a hollow cylincrical rotatable shell; a non-rotatable yoke extending through said shell and having means at each end for supporting said yoke in a support; and means for transmitting pressure between saId yoke and said shell, said means including cylinders in said yoke, a pressure piston slidably mounted in each cylinder, a joint on each piston, a bearing shoe mounted on each joint for bearing against said shell, each said bearing shoe and piston defining a relief pressure chamber therebetween to receive a pressure medium for partially relieveing said joint, and an annular seal between each said bearing shoe and said piston disposed in a plane extending through a pivot point of said joint, at least one of said piston and said bearing shoe having a spherical surface in sealing engagement with said seal.
Claim 2
Dependent Claim
142 words
A roller for pressure treatment of webs comprising a hollow cylincrical rotatable shell; a non-rotatable yoke extending through said shell and having means at each end for supporting said yoke in a support; and means for transmitting pressure between saId yoke and said shell, said means including cylinders in said yoke, a pressure piston slidably mounted in each cylinder, a joint on each piston, a bearing shoe mounted on each joint for bearing against said shell, each said bearing shoe and piston defining a relief pressure chamber therebetween to receive a pressure medium for partially relieveing said joint, and an annular seal between each said bearing shoe and said piston disposed in a plane extending through a pivot point of said joint, at least one of said piston and said bearing shoe having a spherical surface in sealing engagement with said seal.
Claim 3
Dependent Claim
41 words
A roller as set forth in claim 1 wherein each said cylinder and said piston therein define a pressure chamber for receiving a pressure medium and which further comprises a connecting duct communicating said pressure chamber and said relief pressure chamber.
Claim 4
Dependent Claim
57 words
A roller as set forth in claim 2 wherein each said bearing shoe has a hydrostatic bearing pocket in the surface thereof and which further comprises a second connecting duct communicating said relief pressure chamber and said hydrostatic bearing pocket, at least one of said ducts being a restrictor means to a flow of pressure medium therethrough.
Claim 5
Dependent Claim
54 words
A roller as set forth in claim 2 wherein each said bearing shoe has at least two bearing pockets in the surface thereof and which further comprises connecting ducts communicating each said pocket with said relief pressure chamber, said latter connecting ducts each being a restrictor means to a flow of pressure medium therethrough.
Claim 6
Dependent Claim
62 words
A roller as set forth in claim 1 wherein said spherical surface is on said bearing shoe and is received in said piston and said seal is a ring seal guidably received in a groove of said piston and having an internal surface sealingly engaging said spherical surface, said spherical surface having a center coincident with said pivot point of said joint.
Claim 7
Dependent Claim
63 words
A roller as set forth in claim 1 wherein said spherical surface is on said piston and is received in a bearing shoe and said seal is a ing seal guidably received in a groove of said bearing shoe and having an internal surface sealingly engaging said spherical surface, said spherical surface having a center coincident with said pivot point of said joint.
Claim 8
Dependent Claim
50 words
A roller as set forth in claim 1 wherein each said piston has an annular shoulder received in a bearing shoe and said seal is a ring seal guidably received in a groove of said shoulder and having an external surface sealingly engaging a cylindrical surface of said bearing shoe.
Claim 9
Dependent Claim
95 words
A means for transmitting pressure between a hollow cylindrical rotatable shell and a non-rotatable yoke, said means including a cylinder, a pressure piston slidably mounted in said cylinder, a joint on said piston, a bearing shoe pivotally mounted on said joint and defining a chamber with said piston for receiving a pressure medium, an annular seal between said piston and said bearing shoe in a plane extending through a pivot point of said joint, and at least one of said piston and said bearing shoe having a spherical surface in sealng engagement with said seal.
Claim 10
Dependent Claim
95 words
A means for transmitting pressure between a hollow cylindrical rotatable shell and a non-rotatable yoke, said means including a cylinder, a pressure piston slidably mounted in said cylinder, a joint on said piston, a bearing shoe pivotally mounted on said joint and defining a chamber with said piston for receiving a pressure medium, an annular seal between said piston and said bearing shoe in a plane extending through a pivot point of said joint, and at least one of said piston and said bearing shoe having a spherical surface in sealng engagement with said seal.
Claim 11
Dependent Claim
27 words
A means as set forth in claim 8 wherein at least one of said piston and said bearing shoe has a groove slidably receiving said seal 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) | 1977-11-11 | 1978-05-13 | 1978-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-11-11 | 1982-05-13 | 1982-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-11-11 | 1986-05-13 | 1986-11-12 | $7700.00 | Window Closed / Lapsed |