US3578828A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Split-race bearing construction
Assignee: Kaman Aerospace Corp
•
Filing: 1969-02-18
•
Granted: 1971-05-18
•
Expires: 1989-02-18
Abstract
Abstract A dry, self-lubricating bearing comprises an outer and an inner race with coengaging bearing surfaces with the bearing surfaces on one race being made of a solid lubricant material and the bearing surfaces on the other race being made of a hardened material such as a thin ceramic coating on a metal substrate. In one embodiment, the outer race comprises a single member while the inner race comprises two separate members slidably carried within opposed seats of the outer race with the bearing being capable of absorbing radial, axial and moment loading individually or in combination. In other embodiment, the outer race is split comprising two members and/or the outer race is carried within concave seats of the inner race.
Inventors
- 👤 Stanley S Orkin
- 👤 Richard W Hartswick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 11:46
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C17/00; F16C17/10; F16C23/00; F16C23/02; F16C23/04; F16C23/043
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
16 words
In the self-lubricating bearing assembly of claim 1, said solid lubricant material being a carbonaceous material.
Claim 2
Dependent Claim
19 words
In the self-lubricating bearing assembly of claim 1, said solid lubricant material comprising amorphous carbon impregnated with a metal.
Claim 3
Dependent Claim
12 words
In the self-lubriCating bearing assembly of claim 3, said metal being silver.
Claim 4
Dependent Claim
12 words
In the self-lubricating bearing assembly of claim 3, said metal being antimony.
Claim 5
Dependent Claim
14 words
In the self-lubricating bearing assembly of claim 1, said solid lubricant material being polytetrafluoroethylene.
Claim 6
Dependent Claim
20 words
In the self-lubricating bearing assembly of claim 1, said hard material comprising a metal substrate provided with a ceramic coating.
Claim 7
Dependent Claim
33 words
In the self-lubricating bearing assembly of claim 7, said ceramic coating ranging from 0.0005 to 0.010 inches in thickness and said metal substrate having a tensile strength ranging from 35,000 to 250,000 p.s.i.
Claim 8
Dependent Claim
28 words
The self-lubricating bearing assembly of claim 7, wherein ceramic coating is selected from the group consisting of chromium oxide, titanium dioxide, aluminum oxide, titanium carbide and tungsten carbide.
Claim 9
Dependent Claim
27 words
The self-lubricating bearing assembly of claim 7, wherein the metal substrate is selected from the group consisting of titanium, titanium alloy, ferrous alloy, aluminum and aluminum alloy.
Claim 10
Dependent Claim
43 words
In the self-lubricating bearing assembly of claim 1, said bearing surfaces of said outer race means comprising at least in part a solid lubricant material and said bearing surfaces of said split inner race means comprising at least in part a hard material.
Claim 11
Dependent Claim
41 words
In the self-lubricating bearing assembly of claim 1, said bearing surfaces of said inner and outer race means having spherical curvatures with the centers of curvature of said bearing surfaces being located on the axis of rotation of said bearing assembly.
Claim 12
Dependent Claim
14 words
In the self-lubricating bearing assembly of claim 1, said bearing surfaces having conical curvatures.
Claim 13
Dependent Claim
28 words
In the self-lubricating bearing assembly of claim 1, said annular outer race means being split and comprising two annular members maintained a specific distance apart by spacer means.
Claim 14
Dependent Claim
54 words
In the self-lubricating bearing assembly of claim 1, said split inner race means comprising two annular members with one of said members having an axially extending shoulder for mounting said other member and maintaining the bearing surfaces of said split inner race means in contact with said bearing surfaces of said outer race means.
Claim 15
Dependent Claim
48 words
In the self-lubricating bearing assembly of claim 1, said bushing means comprising a sleeve with an integral shoulder engaging a first end face of said split inner race means and a washer welded to said sleeve and engaging a second end face of said split inner race means.
Claim 16
Dependent Claim
58 words
In the self-lubricating bearing assembly of claim 1, said bushing means comprising a first sleeve with an integral shoulder engaging a first end face of said split inner race means and a second sleeve press fit within said first sleeve, said second sleeve having an integral shoulder engaging a second end face of said split inner race means.
Claim 17
Dependent Claim
24 words
In a self-lubricating bearing assembly of claim 17, said first sleeve means having an internal annular groove within which said second sleeve is mounted.
Claim 18
Dependent Claim
77 words
In the self-lubricating bearing assembly of claim 1, said bushing means comprising a sleeve having a first integral shoulder engaging a first end face of said split inner race means, a grooved outer surface and a second shoulder of malleable material engaging a second end face of said split inner race means, said second shoulder being retained on said sleeve by portions of said malleable material which fill said grooves in said outer surface of said sleeve.
Claim 19
Dependent Claim
59 words
In the self-lubricating bearing assembly of claim 1, said bushing means comprising a sleeve with an integral shoulder at one end engaging a first end face of said split inner race means and having a groove at the other end with a snapring mounted within said groove that engages a second end face of said split inner race means.
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) | 1974-05-17 | 1974-11-16 | 1975-05-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-17 | 1978-11-16 | 1979-05-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-17 | 1982-11-16 | 1983-05-18 | $7700.00 | Window Closed / Lapsed |