US4232913A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Restrictor for a bearing pocket in a hydrostatic bearing
Assignee: Lidkopings Mekaniska Verkstads AB
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Filing: 1978-11-20
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Granted: 1980-11-11
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Expires: 1998-11-20
Abstract
Abstract A fluid restrictor for a bearing pocket in a hydrostatic bearing. The bearing comprises a first member having a bearing pocket and a second member confronting and facing the bearing pocket and a channel in the first member for supplying a pressure medium. The channel is preferably located centrally of the pocket in the first bearing member. The outlet of the channel in the bearing pocket is surrounded by a projection having a part which is parallel to the bearing surface of the other member. The projection and bearing surface define a slot-like restrictor wherein the position of the part may be adjusted depthwise in the bearing pocket whereby the pressure in the pocket may be selectively regulated.
Inventors
- 👤 Bengt Nilsson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:30
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0603; F16C32/0614; F16C32/0622
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
173 words
In an assembly comprising at least first and second movable machine elements having confronting first and second hydrostatic bearing surfaces, means defining a channel in said first machine element, at least one bearing pocket surrounding said channel at the end thereof adjacent said second bearing surface, a member mounted in said channel having an axial end face parallel to said second bearing surface defining therebetween a slot restrictor, said member having a through port to convey pressure medium from said channel directly to said slot restrictor inboard of said bearing pocket, means mounting said member for depthwise adjustment in said channel between an upper limit position and a lower limit position wherein the space between said axial end face and said second bearing surface is greater than the space between the said first and second bearing surfaces, actuation of said member in said channel between said limit positions selectively varying pressure in the bearing pocket from a constant pressure source and in turn varying the space between said first and second bearing surfaces.
Claim 2
Dependent Claim
173 words
In an assembly comprising at least first and second movable machine elements having confronting first and second hydrostatic bearing surfaces, means defining a channel in said first machine element, at least one bearing pocket surrounding said channel at the end thereof adjacent said second bearing surface, a member mounted in said channel having an axial end face parallel to said second bearing surface defining therebetween a slot restrictor, said member having a through port to convey pressure medium from said channel directly to said slot restrictor inboard of said bearing pocket, means mounting said member for depthwise adjustment in said channel between an upper limit position and a lower limit position wherein the space between said axial end face and said second bearing surface is greater than the space between the said first and second bearing surfaces, actuation of said member in said channel between said limit positions selectively varying pressure in the bearing pocket from a constant pressure source and in turn varying the space between said first and second bearing surfaces.
Claim 3
Dependent Claim
34 words
In an assembly as claimed in claim 1, wherein the upper limit position is one wherein the axial end face of the piston is at least aligned with the base of the bearing pocket.
Claim 4
Dependent Claim
35 words
Fluid restrictor according to claim 1, characterized by that the element (8) has a threaded portion adapted to co-operate with a correspondingly threaded portion in the bore in the bottom of the bearing pocket (3).
Claim 5
Dependent Claim
24 words
Fluid restrictor according to claim 1, characterized by that exchangeable washers of different thickness can be provided around the mouth of the channel (4).
Claim 6
Dependent Claim
161 words
A fluid restrictor for a bearing pocket in a hydrostatic bearing of the type in which one bearing member comprises a bearing pocket, means defining a first channel in said one bearing member terminating preferably centrally of the pocket and a second bearing member comprising a bearing surface cooperating with and facing said bearing pocket, the mouth of the channel in the bearing pocket being surrounded by means projecting from the bottom of the bearing pocket, said means having a surface parallel to the bearing surface of said second bearing member and defining a slot restrictor, said surface being part of an element which is axially moveable in said first channel and including a second axial channel for a pressure medium, said element having a mainly cylindrical envelope surface and two axially spaced chamfers which are arranged obliquely to the envelope surface and cooperate with two adjustable screw members with tapered ends arranged in threaded bores in said first bearing member.
Claim 7
Dependent Claim
161 words
A fluid restrictor for a bearing pocket in a hydrostatic bearing of the type in which one bearing member comprises a bearing pocket, means defining a first channel in said one bearing member terminating preferably centrally of the pocket and a second bearing member comprising a bearing surface cooperating with and facing said bearing pocket, the mouth of the channel in the bearing pocket being surrounded by means projecting from the bottom of the bearing pocket, said means having a surface parallel to the bearing surface of said second bearing member and defining a slot restrictor, said surface being part of an element which is axially moveable in said first channel and including a second axial channel for a pressure medium, said element having a mainly cylindrical envelope surface and two axially spaced chamfers which are arranged obliquely to the envelope surface and cooperate with two adjustable screw members with tapered ends arranged in threaded bores in said first bearing member.
References Cited (Backward Citations)
US3466951A
Cited
US3719405A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-11-11 | 1984-05-12 | 1984-11-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-11-11 | 1988-05-12 | 1988-11-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-11-11 | 1992-05-12 | 1992-11-11 | $7700.00 | Window Closed / Lapsed |