US3690639A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Helically wound laminated bearings and method of manufacture
Assignee: Caterpillar Inc
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Filing: 1970-10-05
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Granted: 1972-09-12
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Expires: 1990-10-05
Abstract
Abstract An improved cylindrical bearing material of a laminated construction employs a plurality of alternating cylinderical shells of elastomer and metal laminated together in which each metal shell is formed by helically winding a band of the metal in an edge-wise, abutting relationship to form a cylindrical metal shell or sleeve. The resulting bearing material, composed of a plurality of alternating concentric elastomeric and metallic shells can be confined between a cylindrical core and an outer cylindrical retaining ring to form a bearing assembly in which the bearing material may be placed under a radial pre-load, if desired, to decrease its radial deflection when it is placed under radial loads. In the preferred embodiment of the invention, the adjacent metal shells are wound in opposite directions to stabilize the bearing material under torsional loading.
Inventors
- 👤 William D Brandon
- 👤 Jack A Drais
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:43
CPC Classifications
F; F16; F16F; F16F1/00; F16F1/36; F16F1/3605; F16C; F16C27/00; F16C27/06; F16C27/063; F16F1/38; F16F1/3842; F16F2226/00
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
41 words
The cylindrical laminated bearing material as defined in claim 1 wherein an elastomer cylindrical bearing shell is disposed between adjacent non-elastomer cylindrical bearing shells whereby concentric non-elastomer cylindrical bearing shells are separated in the cylindrical laminate by elastomer cylindrical bearing shells.
Claim 2
Dependent Claim
25 words
The cylindrical laminated bearing material as defined in claim 2 wherein each elastomer cylindrical bearing sHell is bonded to the contiguous non-elastomer cylindrical bearing shells.
Claim 3
Dependent Claim
19 words
The cylindrical laminated bearing material as defined in claim 1 wherein the non-elastomer flat band is a metal band.
Claim 4
Dependent Claim
28 words
The cylindrical laminated bearing material as defined in claim 4 wherein the metal band is a brass-plated steel shim stock having a thickness from 0.020 to 0.0015 inches.
Claim 5
Dependent Claim
21 words
The cylindrical laminated bearing material as defined in claim 4 wherein the elastomer is a rubber compounded for the desired characteristics.
Claim 6
Dependent Claim
25 words
The cylindrical laminated bearing material as defined in claim 5 wherein each elastomer cylindrical bearing shell has a wall thickness from 0.005 to 0.060 inches.
Claim 7
Dependent Claim
34 words
The cylindrical laminated bearing material as defined in claim 2 wherein each elastomer cylindrical bearing shell is applied in an uncured state and is cured and bonded to its contiguous non-elastomer cylindrical bearing shells.
Claim 8
Dependent Claim
46 words
The cylindrical laminated bearing material as defined in claim 2 wherein the non-elastomer band in each successive non-elastomer cylindrical bearing shell is disposed at an angle to the non-elastomer band in the immediately preceding non-elastomer cylindrical bearing shell whereby substantially uniform bi-directional torsional response is obtained.
Claim 9
Dependent Claim
37 words
The cylindrical laminated bearing material as defined in claim 9 wherein the non-elastomer bands in adjacent non-elastomer cylindrical bearing shells are helically disposed at equal but opposite angles with reference to the axis of the cylindrical laminate.
Claim 10
Dependent Claim
71 words
A laminated bearing for radial and limited torsional loadings comprising a core having a cylindrical outer surface, and a plurality of concentric elastomer and metallic cylindrical bearing shells successively superimposed on said core to form a cylindrical layered laminate thereon, each metallic cylindrical bearing shell formed by a metal band helically disposed in an edge-abutting relationship to form a metallic cylinder with a helical seam which has a substantially constant diameter.
Claim 11
Dependent Claim
30 words
The bearing as defined in claim 11 wherein the bearing includes an outer cylindrical retaining member which is contiguously disposed on the outermost cylindrical bearing shell of the cylindrical laminate.
Claim 12
Dependent Claim
25 words
The bearing as defined in claim 11 wherein the adjacent metallic cylindrical bearing shells forming the cylindrical laminate are separated by elastomer cylindrical bearing shells.
Claim 13
Dependent Claim
42 words
The bearing as defined in claim 12 wherein the plurality of concentric elastomer and metallic cylindrical bearing shells are compressed between the outer retaining member and the outer cylindrical surface of the core to decrease its radial deflection in the resulting bearing.
Claim 14
Dependent Claim
57 words
The bearing as defined in claim 12 wherein the outer retaining member is segmented with gaps between the ends of its segments whereby the cylindrical laminate between the core and said outer retaining member can be compressed by closing such gaps when the bearing is installed in cooperating structures to decrease radial deflection in the installed bearing.
Claim 15
Dependent Claim
23 words
The bearing as defined in claim 13 wherein the elastomer cylindrical shells are cured and bonded to their contiguous metallic cylindrical bearing shells.
Claim 16
Dependent Claim
38 words
The bearing as defined in claim 11 wherein the metal bands forming the metallic cylindrical bearing shells are cold-worked to induce a curl in said metal bands approximately the diameter of the cylindrical laminate when they are wound.
References Cited (Backward Citations)
US3083065A
Cited
US3504902A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |