Patent US3752542A successfully refreshed from Google Patents.
US3752542A
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US
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Hydrostatic thurst bearing
Assignee: Excelermatic Inc
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Filing: 1972-04-19
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Granted: 1973-08-14
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Expires: 1992-04-19
Abstract
Abstract A hydrostatic thrust bearing for supporting a load member on a support member is described wherein one of the members has a cavity into which pressurized fluid is admitted and which has a seal ring disposed therein movably relative to the other member, the adjacent surfaces of the seal ring and the other member forming a limited leakage fluid path. At least one of these surfaces has an annular control recess formed therein to which pressurized fluid is admitted when the load of the load member and, accordingly, the pressure of the fluid in the cavity decreases thereby to lift the seal ring and increase the crosssection of the limited leakage fluid path.
Inventors
- 👤 C Kraus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:15
CPC Classifications
F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0651; F16C32/0659; F16C32/0681; F16C32/0692
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
106 words
In a hydrostatic thrust bearing for supporting a load member on a support member by a pressurized fluid introduced into a cavity formed in one of said members, a seal ring disposed in said cavity and having a seal face opposite a seal face formed on the other member and being movable relative thereto to provide between said seal faces a limited leakage fluid path of variable cross-section, at least one of said seal faces having an annular control recess formed therein, and means for admitting additional fluid to said annular control recess depending on the position of said load member relative to said support member.
Claim 2
Dependent Claim
106 words
In a hydrostatic thrust bearing for supporting a load member on a support member by a pressurized fluid introduced into a cavity formed in one of said members, a seal ring disposed in said cavity and having a seal face opposite a seal face formed on the other member and being movable relative thereto to provide between said seal faces a limited leakage fluid path of variable cross-section, at least one of said seal faces having an annular control recess formed therein, and means for admitting additional fluid to said annular control recess depending on the position of said load member relative to said support member.
Claim 3
Dependent Claim
27 words
A bearing as claimed in claim 1, wherein said cavity is formed in said load member and said annular control recess is formed in said seal ring.
Claim 4
Dependent Claim
58 words
A bearing as claimed in claim 1, wherein said means for admitting additional fluid to said annular control recess includes a communication path between said cavity and said control recess and at least one valve means disposed in said communication path and controlled by said load member for regulating admission of said additional fluid to said control recess.
Claim 5
Dependent Claim
46 words
A bearing as claimed in claim 3, wherein said valve means is a needle valve having its needle associated with said load member and extending into said communication path for restricting admission of fluid to said control recess when the load of said load member increases.
Claim 6
Dependent Claim
37 words
A bearing as claimed in claim 1, wherein at least one of said seal faces has annular grooves and at least the grooves adjacent the cavity are interconnected to permit fluid pressure build-up between said seal faces.
References Cited (Backward Citations)
US3119639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-13 | 1977-02-12 | 1977-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-13 | 1981-02-12 | 1981-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-13 | 1985-02-12 | 1985-08-14 | $7700.00 | Window Closed / Lapsed |