US3742653A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Control devices for the radial displacement of shafts
Assignee: Toyoda Koki KK
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Filing: 1971-07-13
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Granted: 1973-07-03
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Expires: 1991-07-13
Abstract
Abstract In a control device for the radial displacement of a shaft supported in a fluid bearing, the bearing including a plurality of circumferentially spaced apart pressure pockets surrounding the shaft and a control valve for creating a pressure differential in the pressure of the pressurized fluid admitted into selected ones of the pressure pockets for radially displacing the shaft, there are provided electromotive means for operating the control valve, and a digital control for the electromotive means for regulating the speed and quantity of the radial displacement of the axis of the shaft.
Inventors
- 👤 S Niitaka
- 👤 K Kano
- 👤 K Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:14
CPC Classifications
G; G05; G05B; G05B19/00; G05B19/02; G05B19/18; G05B19/416; G05B19/4166; B; B24; B24B; B24B41/00; B24B41/04; F; F16; F16C; F16C32/00; F16C32/06; F16C32/0629; F16C32/064; F16C32/0644; F16C32/0662; F16C32/067; F16C32/0681; F16C32/0685; F16C2322/00; F16C2322/39; G05B2219/00; G05B2219/30; G05B2219/41; G05B2219/41326; G05B2219/45; G05B2219/45161; G05B2219/49; G05B2219/49271; G05B2219/50; G05B2219/50293
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
93 words
A control device for the radial displacement of a shaft supported in a fluid bearing, comprising displacing means including a plurality of circumferentially spaced apart pressure pockets surrounding said shaft, a control valve to create a pressure differential in the pressure of the pressurized fluid admitted into selected ones of said pressure pockets for radially displacing the axis of said shaft, electromotive means for operating said control valve, and digital control means to control said electromotive means for regulating the speed and quantity of the radial displacement of said axis of said shaft.
Claim 2
Dependent Claim
93 words
A control device for the radial displacement of a shaft supported in a fluid bearing, comprising displacing means including a plurality of circumferentially spaced apart pressure pockets surrounding said shaft, a control valve to create a pressure differential in the pressure of the pressurized fluid admitted into selected ones of said pressure pockets for radially displacing the axis of said shaft, electromotive means for operating said control valve, and digital control means to control said electromotive means for regulating the speed and quantity of the radial displacement of said axis of said shaft.
Claim 3
Dependent Claim
21 words
A control valve according to claim 1, in which said displacing means is mounted in coaxial relationship with said fluid bearing.
Claim 4
Dependent Claim
20 words
The control device according to claim 1 wherein said electromotive means comprises a pulse motor coupled to said control valve.
Claim 5
Dependent Claim
78 words
The control device according to claim 1 wherein four of said pressure pockets are provided on the upper and lower sides and on the front and rear sides of said shaft, and wherein said control valve is provided with two outlet ports for said pressurized fluid, one of said ports leading to said upper and front pressure pockets whereas the other to said lower and rear pressure pockets, thus displacing said axis in the forward or rearward direction.
Claim 6
Dependent Claim
27 words
The control device according to claim 1 wherein said shaft carries a grinding wheel so that said grinding wheel is moved toward and away from a workpiece.
Claim 7
Dependent Claim
77 words
The control device according to claim 1 wherein said control valve comprises a sleeve provided with two axially spaced apart fluid outlet ports and, one fluid inlet port intermediate said fluid outlet ports, a spool contained in said sleeve and is provided with two axially spaced apart lands for cooperating with said outlet ports, means to rotate said spool in said sleeve, and means for converting the rotary motion of said spool into the axial movement, thereof.
Claim 8
Dependent Claim
79 words
The control device according to claim 3 wherein said control circuit comprises a tape for storing informations regarding the speed and quantity of said displacement of said axis, a tape reader to read out said informations, a pulse oscillator, means responsive to said speed information for presetting the frequency of the pulse generated by said pulse generator and means responsive to said quantity information for presetting the number of pulses supplied to said pulse motor from said pulse oscillator.
Claim 9
Dependent Claim
53 words
The control device according to claim 7 wherein said control circuit further includes means operated when said pulse motor is in its normal position that is when the axis of said shaft is maintained in the normal position for stopping the supply of said pulse to said pulse motor from said pulse oscillator.
References Cited (Backward Citations)
US2459826A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-07-02 | 1977-01-01 | 1977-07-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-02 | 1981-01-01 | 1981-07-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-02 | 1985-01-01 | 1985-07-03 | $7700.00 | Window Closed / Lapsed |