Patent US3863493A successfully refreshed from Google Patents.
US3863493A
Expired / Lapsed
US
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Compensated fluidic bearing clearance monitor
Assignee: United States Department of the Navy
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Filing: 1973-11-23
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Granted: 1975-02-04
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Expires: 1993-11-23
Abstract
Abstract A fluidic indicating system for monitoring clearances in hydrostatic bearings which has two identical fluidic nozzles connected to a pressurized fluid supply through identical lines. Errors due to environmental changes are eliminated by the use of identical nozzles and mounting them in a close proximity to each other. A fluidic logic system connected to the nozzles processes any differential pressure and provides a warning when bearing clearance goes above or below predetermined limits. The system also indicates a normal condition when bearing clearances are between predetermined limits.
Inventors
- 👤 Charles C Busenkell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 07:38
CPC Classifications
G; G01; G01B; G01B13/00; G01B13/12
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
168 words
A fluidic indicating system for monitoring clearances in a hydrostatic bearing comprising: a. a first nozzle mounted in the bearing housing adjacent to the bearing; b. a second nozzle mounted in close proximity to said first nozzle so that said first and second nozzles are in the same environment; c. a plate mounted adjacent to the output of the second nozzle a predetermined distance; d. a pressurized fluid supply connected through identical lines to said first and second nozzle; e. a fluidic analog proportional amplifier connected to said first and second nozzles for amplifying any pressure difference between the two nozzles; f. a fluidic analog to digital converter connected to the outputs of the fluidic analog proportional amplifier, and having first and second outputs; g. a warning device connected to the first output of the analog to digital converter to indicated when the pressure in the first nozzle exceeds the pressure in the second nozzle whereby a warning is given when bearing clearance goes below a predetermined minimum.
Claim 2
Dependent Claim
168 words
A fluidic indicating system for monitoring clearances in a hydrostatic bearing comprising: a. a first nozzle mounted in the bearing housing adjacent to the bearing; b. a second nozzle mounted in close proximity to said first nozzle so that said first and second nozzles are in the same environment; c. a plate mounted adjacent to the output of the second nozzle a predetermined distance; d. a pressurized fluid supply connected through identical lines to said first and second nozzle; e. a fluidic analog proportional amplifier connected to said first and second nozzles for amplifying any pressure difference between the two nozzles; f. a fluidic analog to digital converter connected to the outputs of the fluidic analog proportional amplifier, and having first and second outputs; g. a warning device connected to the first output of the analog to digital converter to indicated when the pressure in the first nozzle exceeds the pressure in the second nozzle whereby a warning is given when bearing clearance goes below a predetermined minimum.
Claim 3
Dependent Claim
16 words
The fluidic system of claim 1 wherein the plate adjacent to the second nozzle is adjustable.
Claim 4
Dependent Claim
93 words
The fluidic system of claim 1 including: a. a biased fluidic amplifier connected to the first nozzle and having first and second outputs; b. means connecting the biased fluidic amplifier to the fluid supply; said means including a neddle valve for adjusting the fluid supply to a predetermined pressure; c. a warning device connected to the first output of the biased fluidic amplifier for indicating when the pressure in the first nozzle is below the pressure set by the needle valve whereby a warning is given when bearing clearance exceeds a predetermined maximum.
Claim 5
Dependent Claim
66 words
The fluidic system of claim 3 further including: a. a fluidic AND gate connected to the second output of the analog to digital converter and to the second output of the biased fluidic amplifier; and b. an indicating device connected to said AND gate for indicating a normal condition when the pressure in the first nozzle is below a predetermined maximum and above a predetermined minimum.
References Cited (Backward Citations)
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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) | 1978-02-03 | 1978-08-05 | 1979-02-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-03 | 1982-08-05 | 1983-02-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-03 | 1986-08-05 | 1987-02-04 | $7700.00 | Window Closed / Lapsed |