US3668040A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for bonding bearing liners
Assignee: Torrington Co Ltd
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Filing: 1969-11-03
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Granted: 1972-06-06
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Expires: 1989-11-03
Abstract
Abstract The invention contemplates maintenance of uniform controlled pressure and temperature at the zone of bonding a fabric or the like liner to a bearing ring or the like, the pressure and temperature being at the levels required for optimum curing of the particular thermosetting material involved. The pressure is developed by axial compression of an elastomeric plug, which is so constrained that radial loading of the lining on the bearing element necessarily results from hydrostatic deformation of the plug. The heat supplied for curing also causes the plug to expand, but the invention provides for automatic compensation for plug expansion so as to maintain substantially constant pressure loading on the liner in the course of a curing cycle. Means are disclosed for the bonding of a plurality of lined bearing elements in a single batch processing cycle.
Inventors
- 👤 Gordon J Clark
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:37
CPC Classifications
B; B25; B25B; B25B27/00; B25B27/0021; B29; B29C; B29C65/00; B29C65/02; B29C65/18; B29C65/48; B29C65/4805; B29C65/483; B29C65/4835; B29C66/00; B29C66/70; B29C66/73; B29C66/739; B29C66/7394; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C65/481; B29C66/72; B29C66/729; B29C66/737; B29C66/7375; B29C66/73751; B29C66/73753; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49636; Y10T29/49643; Y10T29/49647; Y10T29/49668; Y10T29/49677
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
13 words
The method of claim 1, wherein the selected plug is of silicone rubber.
Claim 2
Dependent Claim
15 words
The method of claim 1, wherein the selected plug is of high-temperature fluorinated elastomeric material.
Claim 3
Dependent Claim
21 words
The method of claim 1, wherein the liner is a fabric having fibers of tetrafluoroethylene exposed at the inner surface thereof.
Claim 4
Independent Claim
140 words
The method of bonding a yieldable low-friction bearing liner to a rigid bearing element having a cylindrical surface to be lined, which comprises selecting liner material of size to circumferentially and axially fit said cylindrical surface with thermosetting adhesive material at the interface of said liner with said cylindrical surface, selecting a plug of elastomeric material having a cylindrical surface which radially clears said liner and the cylindrical surface of the bearing element when axially overlapped therewith, said plug being of axial extent exceeding the axial extent of the liner, preliminarily assembling the plug and liner and bearing element into axial overlap, compressing the plug to radially squeeze the liner to the cylindrical surface of the bearing element, heating the plug, and maintaining a predetermined elevated heated and pressurized state of the plug for a predetermined period of adhesive-curing time.
Claim 5
Dependent Claim
20 words
The method of claim 5, wherein said plug is cyLindrical and said bearing element is a ring surrounding said plug.
Claim 6
Dependent Claim
23 words
The method of claim 5, wherein said plug is annular and the cylindrical surface of said bearing element is received within said plug.
Claim 7
Dependent Claim
27 words
The method of claim 7, wherein the compression of the plug is achieved by axially compressing the plug while rigidly confining the outer circumference of the plug.
Claim 8
Independent Claim
170 words
The method of bonding a fabric liner to the bore of a rigid bearing ring, utilizing a pair of opposed platens, which comprises preliminarily assembling the liner to the bore of the ring with thermosetting material at the ring-liner interface, said thermosetting material being in a stage less than fully cured, selecting a cylindrical plug of elastomeric material of diametral extent to fit the preliminarily lined bore of the ring and of axial extent exceeding the axial extent of the ring, axially inserting the plug into overlap with the ring and liner, placing the plugged ring between the platens with the ends of the plug facing the respective platens, drawing the platens together to axially compress the plug and thus radially compress the liner to the ring bore, heating at least one of said platens to heat the plug and achieve curing temperature in the thermosetting material, and maintaining a predetermined elevated heated and pressurized state of the plug for a predetermined period of curing time for the thermosetting material.
Claim 9
Dependent Claim
40 words
The method of claim 9, in which plural like assemblies of plugged lined rings are placed in laterally spaced relation between the platens, so that plural lined rings may be bonded in a given heat-and-pressure curing cycle of the platens.
Claim 10
Dependent Claim
15 words
The method of claim 1, in which said flexible liner includes a woven fabric material.
Claim 11
Dependent Claim
52 words
The method of claim 1, wherein the bore of the ring includes a chamfer at one end, and wherein the plug and liner are assembled in axial overlap with the chamfer, whereby the liner is bonded to the chamfer as well as to the rest of the lined part of the bore.
References Cited (Backward Citations)
US2683875A
Cited
US3184362A
Cited
US3139311A
Cited
US3387839A
Cited
US3349944A
Cited
US3443716A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-06 | 1975-12-06 | 1976-06-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-06 | 1979-12-06 | 1980-06-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-06 | 1983-12-06 | 1984-06-06 | $7700.00 | Window Closed / Lapsed |