US3711167A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hydrostatic bearings
Assignee: William Asquith Ltd
•
Filing: 1971-02-16
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Granted: 1973-01-16
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Expires: 1991-02-16
Abstract
Abstract A hydrostatic bearing has a pad mounted between the two relatively movable members of the bearing, the pad being free to move perpendicular to the bearing face but restrained against movement in the direction of movement of the movable member of the bearing, there being a substantially continuous sealing element engaging between the inside face of the pad and one of the bearing members, and a second substantially continuous sealing element on the outside face of the pad for engagement with the other bearing member, the area enclosed by the inside sealing element being greater than that enclosed by the outside sealing element and means for admitting fluid under pressure simultaneously to both faces of the pad.
Inventors
- 👤 B Ennis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:23
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; B; B23; B23Q; B23Q1/00; B23Q1/25; B23Q1/26; B23Q1/38; F16C29/00; F16C29/02; F16C29/025; F16C2322/00; F16C2322/39
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
225 words
A hydrostatic bearing comprising two bearing members movable relatively to each other; a pad mounted on the first of the two bearing members and restrained against movement in the direction of movement of the second bearing member relatively to the first by restraining means, but having freedom for some movement in a direction substantially perpendicular to the relative movement between the bearing members; a substantially continuous resilient first sealing element engaging between the inside face of the pad and part of the first bearing member, and enclosing an area on the inside face of the pad; a second substantially continuous sealing element on the outside face of the pad for engagement with the second bearing member, and enclosing an area on the outside face of the pad smaller than the enclosed area on the inside of the pad, a communicating port between the two encLosed areas on opposite sides of the pad, and means for admitting fluid under pressure to the enclosed area on the inside of the pad, whereby when fluid under pressure is supplied to the bearing there is a pressure differential urging the pad towards the second bearing member, the fluid in the outside enclosed area providing the hydrostatic effect and the escape of fluid from this area being inhibited by engagement of the second sealing element with the second bearing member.
Claim 2
Dependent Claim
225 words
A hydrostatic bearing comprising two bearing members movable relatively to each other; a pad mounted on the first of the two bearing members and restrained against movement in the direction of movement of the second bearing member relatively to the first by restraining means, but having freedom for some movement in a direction substantially perpendicular to the relative movement between the bearing members; a substantially continuous resilient first sealing element engaging between the inside face of the pad and part of the first bearing member, and enclosing an area on the inside face of the pad; a second substantially continuous sealing element on the outside face of the pad for engagement with the second bearing member, and enclosing an area on the outside face of the pad smaller than the enclosed area on the inside of the pad, a communicating port between the two encLosed areas on opposite sides of the pad, and means for admitting fluid under pressure to the enclosed area on the inside of the pad, whereby when fluid under pressure is supplied to the bearing there is a pressure differential urging the pad towards the second bearing member, the fluid in the outside enclosed area providing the hydrostatic effect and the escape of fluid from this area being inhibited by engagement of the second sealing element with the second bearing member.
Claim 3
Dependent Claim
24 words
A hydrostatic bearing as claimed in claim 1, in which the second sealing element has flat ''''lands'''' for engagement with the second bearing member.
Claim 4
Dependent Claim
51 words
A hydrostatic bearing as claimed in claim 1, in which said second sealing element defines a continuous groove formed in the face of said second sealing element to collect fluid escaping from the enclosed area on the outside of the pad, said pad having a scavenging port connected into said groove.
Claim 5
Dependent Claim
23 words
A hydrostatic bearing as claimed in claim 1, in which said second sealing element is made of wear resistant material, such as nylon.
Claim 6
Dependent Claim
28 words
A hydrostatic bearing as claimed in claim 1, in which said first sealing element is located in a groove formed in said pad on the inside face thereof.
Claim 7
Dependent Claim
23 words
A hydrostatic bearing as claimed in claim 1, in which said first sealing element is in the form of a resilient ''O'' ring.
Claim 8
Dependent Claim
43 words
A hydrostatic bearing according to claim 1, wherein at least one detachable location member locates said pad relative said first bearing member, whereby said pad can be released and removed when said location member is detached, without removing one of said bearing members.
Claim 9
Dependent Claim
33 words
A hydrostatic bearing according to claim 1, said pad being rectangular, and where in said restraining means comprises bearing blocks fixed to said first bearing member slidably engaging the corners of said pad.
Claim 10
Dependent Claim
62 words
A hydrostatic bearing as claimed in claim 1, wherein said pad is mounted on a flat surface of said first bearing member, said first sealing element is a resilient sealing ring engaging said flat surface, and said second sealing element comprises a sheet of hard wear resistant plastic having around its periphery a raised flat surface engaged with said second bearing member.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-16 | 1976-07-17 | 1977-01-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-16 | 1980-07-17 | 1981-01-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-16 | 1984-07-17 | 1985-01-16 | $7700.00 | Window Closed / Lapsed |