Patent US3900408A successfully refreshed from Google Patents.
US3900408A
Expired / Lapsed
US
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Bearing liner
Assignee: Delaware Capital Formation Inc
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Filing: 1974-06-03
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Granted: 1975-08-19
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Expires: 1994-06-03
Abstract
Abstract To provide support for a rotatable shaft, a bearing ball is fixed to the shaft and rotatably mounted within a bearing race. A low friction liner which is disposed between the wearing surfaces of the ball and the race includes a backing, which can be adhered to the wearing surface of the bearing race, and a layer of low friction material, which can be disposed to contact the bearing and thereby provide permanent lubrication between the bearing and the race. The backing can be paper impregnated with chopped, compressed fibers such as wood or rice to provide the liner with a substantially linear stress-strain characteristic similar to that of metals. The paper backing reduces the deflection of the liner in response to compressive stresses so that the accuracy of movement of the bearing within the race is increased significantly. The layer of low friction material may be formed from an intimate mixture of an adhesive and small particles of a low friction material.
Inventors
- 👤 Peter H Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 02:20
CPC Classifications
F; F16; F16C; F16C23/00; F16C23/02; F16C23/04; F16C23/043; F16C23/045; F16C33/00; F16C33/02; F16C33/04; F16C33/20; F16C33/201
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
134 words
A LINER FOR REDUCING THE COEFFICIENT OF FRICTION BETWEEN FIRST AND SECOND SURFACES RELATIVE TO EACH OTHER, COMPRISING: A FIBROUS BACKING HAVING FIRST AND SECOND MAJOR SURFACES AND HAVING CHOPPED AND COMPRESSED FIBERS TO REINFORCE THE LINER, AN ADHESIVE LAYER IN FIXED RELATIONSHIP WITH THE FIRST MAJOR SURFACE OF THE BACKING FOR BONDING THE BACKING TO THE FIRST SURFACE, AND A LOW FRICTION LAYER IN FIXED RELATIONSHIP WITH THE SECOND MAJOR SURFACE OF THE BACKING AND PROVIDING A LOW FRICTION SURFACE FOR SLIDABLY ENGAGING THE SECOND SURFACE, THE LOW FRICTION LAYER HAVING A THIN DIMENSION RELATIVE TO THE SECOND MAJOR SURFACE AND BEING FORMED FROM SMALL PORTIONS OF LOW FRICTION MATERIAL INTERSPERSED IN AN ADHESIVE WHEREBY THE SECOND AND LOW FRICTION SURFACES HAVE A LOWER COEFFICIENT OF FRICTION THAN THE FIRST AND SECOND SURFACES.
Claim 2
Dependent Claim
134 words
A LINER FOR REDUCING THE COEFFICIENT OF FRICTION BETWEEN FIRST AND SECOND SURFACES RELATIVE TO EACH OTHER, COMPRISING: A FIBROUS BACKING HAVING FIRST AND SECOND MAJOR SURFACES AND HAVING CHOPPED AND COMPRESSED FIBERS TO REINFORCE THE LINER, AN ADHESIVE LAYER IN FIXED RELATIONSHIP WITH THE FIRST MAJOR SURFACE OF THE BACKING FOR BONDING THE BACKING TO THE FIRST SURFACE, AND A LOW FRICTION LAYER IN FIXED RELATIONSHIP WITH THE SECOND MAJOR SURFACE OF THE BACKING AND PROVIDING A LOW FRICTION SURFACE FOR SLIDABLY ENGAGING THE SECOND SURFACE, THE LOW FRICTION LAYER HAVING A THIN DIMENSION RELATIVE TO THE SECOND MAJOR SURFACE AND BEING FORMED FROM SMALL PORTIONS OF LOW FRICTION MATERIAL INTERSPERSED IN AN ADHESIVE WHEREBY THE SECOND AND LOW FRICTION SURFACES HAVE A LOWER COEFFICIENT OF FRICTION THAN THE FIRST AND SECOND SURFACES.
Claim 3
Dependent Claim
19 words
The low friction linear as defined in claim 1 wherein the compressed fibers are randomly disposed in the backing.
Claim 4
Dependent Claim
29 words
The low friction liner as defined in claim 1 wherein the low friction layer comprises an intimate mixture of an adhesive and a powder of a low friction material.
Claim 5
Dependent Claim
21 words
The low friction liner recited in claim 1 wherein the fibrous backing comprises paper and the compressed fibers are vegetable fibers.
Claim 6
Dependent Claim
23 words
The low friction liner as defined in claim 1 wherein the fibrous paper backing is calendered to harden the surfaces of the backing.
Claim 7
Dependent Claim
85 words
The low friction layer as defined in claim 1 wherein the fibrous backing is a laminate comprising: a first layer of fibers generally oriented to provide a relatively high tensile strength in a first direction, and at least a second layer of fibers similar to the first layer and disposed in surface contact therewith and generally oriented In a second direction transverse to the first direction; whereby the laminated backing provides the liner with properties including a high tensile strength and substantially improved stress properties.
Claim 8
Dependent Claim
124 words
A bearing liner for use between a first surface and a second surface for reducing the friction between the first and second surfaces during relative movement between the first and second surfaces, comprising: first means constituting a fibrous material and having first and second major surfaces for reinforcing the liner, the first means having characteristics providing a deflection in response to a given compressive force; second means for adhering the first major surface of the first means to the second surface; and third means constituting particles of a low friction material in a mechanically bonded relationship with the fibrous material constituting the first means and providing a low friction layer between the first means and the first surface, the third means including an adhesive.
Claim 9
Dependent Claim
124 words
A bearing liner for use between a first surface and a second surface for reducing the friction between the first and second surfaces during relative movement between the first and second surfaces, comprising: first means constituting a fibrous material and having first and second major surfaces for reinforcing the liner, the first means having characteristics providing a deflection in response to a given compressive force; second means for adhering the first major surface of the first means to the second surface; and third means constituting particles of a low friction material in a mechanically bonded relationship with the fibrous material constituting the first means and providing a low friction layer between the first means and the first surface, the third means including an adhesive.
Claim 10
Dependent Claim
18 words
The bearing liner as defined in claim 7, wherein fibers are disposed at random within the fibrous material.
Claim 11
Dependent Claim
30 words
The bearing liner as defined in claim 8 wherein the third means includes an intimate mixture of an adhesive and the particles of the low friction material constitute a powder.
Claim 12
Dependent Claim
30 words
The bearing liner as recited in claim 9 wherein the fiber is a vegetable fiber and the deflection of the liner is substantialy directly proportional to the applied compressive force.
Claim 13
Dependent Claim
14 words
The bearing liner as defined in claim 10 wherein the vegetable fibers are compressed.
Claim 14
Dependent Claim
14 words
The bearing liner as defined in claim 10 wherein the vegetable fibers includes rice.
Claim 15
Dependent Claim
74 words
The bearing liner as defined in claim 9 wherein the first means is formed from at least a pair of laminations and wherein the fibers are oriented in a first one of the laminations to provide a relatively high tensile strength in a first direction and wherein the fibers are oriented in a second one of the laminations to provide a relatively high tensile strength in a second direction transverse to the first direction.
Claim 16
Dependent Claim
27 words
The liner set forth in claim 1 wherein the low friction layer extends above the second major surface by a dimension no greater than approximately 0.0035 inches.
Claim 17
Dependent Claim
39 words
The liner set forth in claim 1 wherein the particles of low friction material have a thickness no greater than 5 microns and wherein the particles of low friction material are retained between the fibers of the fibrous backing.
Claim 18
Dependent Claim
41 words
The liner set forth in claim 15 wherein the particles of low friction material constitute a polytetrafluoroethylene and wherein the polytetrafluoroethylene constitutes approximately 20 percent to 35 percent of the low friction layer by weight with the remainder constituting the adhesive.
Claim 19
Dependent Claim
46 words
The liner set forth in claim 16 wherein the adhesive in the adhesive layer and the adhesive in the low friction layer are the same and wherein the low friction layer extends above the second major surface by a distance no greater than approximately 0.0035 inches.
Claim 20
Dependent Claim
18 words
A bearing liner as set forth in claiam 8 wherein the fibers in the fibrous material are compressed.
Claim 21
Dependent Claim
18 words
A bearing liner as set forth in claiam 8 wherein the fibers in the fibrous material are compressed.
Claim 22
Dependent Claim
37 words
A bearing liner as set forth in claim 18 wherein the third means constitutes an intimate mixture of an adhesive and the particles of the low friction material and wherein the low friction material constitutes a polytetrafluoroethylene.
Claim 23
Dependent Claim
67 words
The bearing liner set forth in claim 7, wherein the first means includes fibers disposed within the fibrous material and wherein the first means provides a relatively small amount of deflection when subjected to different compressive forces and further provides substantially a linear relationship between progressive amounts of progressive forces imposed upon the first means and the deflection produced in the first means by such progressive forces.
Claim 24
Dependent Claim
52 words
The bearing liner set forth in claim 20 wherein the first means comprises a pair of atTached laminations each formed from a fibrous material with one of the layers having fibers disposed in a first orientation and the other layer having fibers disposed in a second orientation different from the first orientation.
Claim 25
Dependent Claim
47 words
The bearing liner set forth in claim 1 wherein the fibrous backing is disposed in layers and wherein the compressed fibers have a first orientation in one of the layers and have in a second one of the layers a second orientation different from the first orientation.
Claim 26
Dependent Claim
58 words
The bearing liner set forth in claim 7 wherein the first means constitutes at least a pair of layers of the fibrous material and wherein fibers are disposed in a first orientation in one of the layers and wherein fibers are disposed in a second one of the layers in a second orientation different from the first orientation.
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) | 1978-08-18 | 1979-02-17 | 1979-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-08-18 | 1983-02-17 | 1983-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-08-18 | 1987-02-17 | 1987-08-19 | $7700.00 | Window Closed / Lapsed |