US3764186A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrodynamic bearing
Assignee: Individual
•
Filing: 1972-03-13
•
Granted: 1973-10-09
•
Expires: 1992-03-13
Abstract
Abstract A hydrodynamic groove bearing with two bearing parts which have surfaces of revolution facing each other, one of which has spiral grooves, which are subdivided in at least two groups, the grooves of one group start and end in a certain segment of the grooved surface and are connected in series hydrodynamically by means of communicating channels.
Inventors
- 👤 N Laing
- 👤 I Laing
- 👤 L Ludin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:34
CPC Classifications
F; F16; F16C; F16C33/00; F16C33/02; F16C33/04; F16C33/06; F16C33/10; F16C33/1025; F16C33/106; F16C33/107; F16C17/00; F16C17/04; F16C17/045; F16C17/10; F16C17/102; F16C17/105
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
136 words
Plane bearings of the type having two bearing parts where the parts have surfaces of revolution facing each other forming the boundary of a bearing clearance adapted to contain a lubricant for carrying a load where one of the surfaces has grooves the width of which are larger than the depth and which are arranged such that during the rotation of the bearing parts relative to each other, a hydrodynamic pressure is generated by the lubricant in the bearing clearance which pressure increases towards the bearing axis, characterized in that the surface of revolution which is grooved is divided into at least two segments and having communicating channels connecting the beginning and ending of grooves in a segment such that hydrodynamic pressure rises in the individual grooves and increases in the direction towards the bearing axis.
Claim 2
Dependent Claim
136 words
Plane bearings of the type having two bearing parts where the parts have surfaces of revolution facing each other forming the boundary of a bearing clearance adapted to contain a lubricant for carrying a load where one of the surfaces has grooves the width of which are larger than the depth and which are arranged such that during the rotation of the bearing parts relative to each other, a hydrodynamic pressure is generated by the lubricant in the bearing clearance which pressure increases towards the bearing axis, characterized in that the surface of revolution which is grooved is divided into at least two segments and having communicating channels connecting the beginning and ending of grooves in a segment such that hydrodynamic pressure rises in the individual grooves and increases in the direction towards the bearing axis.
Claim 3
Dependent Claim
106 words
Plain bearings according to claim 1, characterized in that the grooves beginning and ending in one segment are subdivided into two groups, where the grooves correlated to the group nearer the periphery of the surface of revolution are connected in series hydrodynamically via communicating channels such that the pressure rises in the individual grooves add up in the direction towards the bearing axis and the grooves correlated to the group nearer the bearing axis are connected in series hydrodynamically via communicating channels that the pressure rises in the individual grooves of this group add up in the direction towards the periphery of the surface of revolution.
Claim 4
Dependent Claim
52 words
Plain bearings according to claim 2, characterized in that the grooves in the individual segments are connected in series group by group such that the pressure riSes in the individual grooves add up in the direction towards a circle with a radius of about one-half the radius of the effective sliding surface.
Claim 5
Dependent Claim
24 words
Plain bearings according to claim 1, characterized in that the grooves within the segments are parallel and run approximately concentrically about the bearing axis.
Claim 6
Dependent Claim
17 words
Plane bearings according to claim 1 characterized in that the grooves form acute angles in radial planes.
Claim 7
Dependent Claim
42 words
Plain bearings according to claim 4, characterized in that the grooves in the individual segments in at least two different groups form angles of different magnitude with the radial planes and that the extensions of the grooves of these two groups intersect.
Claim 8
Dependent Claim
27 words
Plain bearings according to claim 5, characterized in that the grooves form angles with the radial planes which continuously vary in the direction towards the bearing axis.
Claim 9
Dependent Claim
29 words
Plain bearings according to claim 1, characterized in that the communicating channels are formed on the side of the bearing part opposite to the side facing the bearing clearance.
Claim 10
Dependent Claim
33 words
Plain bearings according to claim 1, characterized in that the communicating channels are formed as channels open towards the bearing clearance, with a depth substantially larger than that of the pressure generating grooves.
Claim 11
Dependent Claim
16 words
Plain bearings according to claim 1, characterized in that the grooves of neighbouring segments partially overlap.
Claim 12
Dependent Claim
25 words
Plain bearings according to claim 1, characterized in that the end of the last groove in each segment nearest to the bearing axis is closed.
Claim 13
Dependent Claim
58 words
Plain bearings according to claim 1, characterized in that the bearing part comprising the grooves has a surface of revolution on the side opposite the side facing the bearing clearance and this opposite side is rotable on a bearing base, in which the communicating channels are placed, which communicate with the grooves via holes through the bearing part.
Claim 14
Dependent Claim
88 words
Plain bearings according to claim 12 for use in both senses of rotation, characterized in that the bearing part comprising the grooves and the bearing base comprising the channels can perform a definite limited turning motion relative to each other and that the communicating channels in the bearing base are so correlated with the holes through the bearing part in both end positions of the two parts that the grooves in the individual segments in the two different end positions are connected in series hydrodynamically in opposite senses.
Claim 15
Dependent Claim
26 words
Plain bearings according to claim 1, characterized in that one of the bearing parts is a thin-walled cup which is supported by a thick-walled bearing base.
Claim 16
Dependent Claim
19 words
Plain bearings according to claim 14, characterized in that the thin-walled bearing part has a bead at its periphery.
Claim 17
Dependent Claim
27 words
Plain bearings according to claim 15, characterized in that, between the thick-walled bearing base and the thin-walled bearing cup, channels are arranged which preferably lie along meridians.
Claim 18
Dependent Claim
31 words
Plain bearings according to claim 1, characterized in that, between the thin-walled bearing part and the thick-walled bearing base, a cavity remains which communicates with the bearing clearance via an aperture.
Claim 19
Dependent Claim
25 words
Plane bearings according to claim 17 characterized in that webs of an elastomeric material are positioned in the cavity to divide the cavity into segments.
Claim 20
Dependent Claim
24 words
Plain bearings according to claim 18, characterized in that each of the cavities communicates via an aperture with the correlated segment of the grooves.
Claim 21
Dependent Claim
31 words
Plain bearings according to claim 1, characterized in that the bearing part, which carries the grooves, consists of two permanently joined layers and that channels are formed between the two layers.
References Cited (Backward Citations)
US3663074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-10-08 | 1977-04-09 | 1977-10-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-10-08 | 1981-04-09 | 1981-10-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-10-08 | 1985-04-09 | 1985-10-09 | $7700.00 | Window Closed / Lapsed |