US3582228A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for controlling the rotation of a high-speed rotating spindle
Assignee: Toyoda Koki KK
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Filing: 1968-10-09
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Granted: 1971-06-01
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Expires: 1988-10-09
Abstract
Abstract An apparatus for controlling the rotation of a high-speed rotating spindle supported by gas bearings, the spindle being maintained in a floating state by a gas film interposed between the periphery thereof and the peripheries of the bearings and rotated by a gas turbine coaxially mounted therewith, the bearings and the turbine being driven by a gas which is supplied from one common supply source, including means for preventing the spindle from whirling.
Inventors
- 👤 Tamaki Tomita
- 👤 Ryuji Wada
- 👤 Ituo Yokoyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:50
CPC Classifications
F; F01; F01D; F01D25/00; F01D25/18; F01D25/22; Y; Y10; Y10S; Y10S415/00; Y10S415/904; Y10T; Y10T409/00; Y10T409/30; Y10T409/309352
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
122 words
An apparatus for controlling the rotation of a high-speed rotating spindle which comprises a high-speed rotating spindle; bearing means for supporting said rotating spindle in a floating condition by a gas film interposed between the periphery of said bearing means and the periphery of said spindle; a rotatable gas turbine coaxially fixed to said spindle for rotating said spinDle with a high-speed gas jet running therethrough; a common gas source for supplying a pressurized gas directly to said bearing means and indirectly to said turbine; and a pressure reducing means connected to said common gas source for reducing the pressure supplied from said common gas source on the way to the turbine to prevent unstable movement of said spindle during rotation thereof.
Claim 2
Independent Claim
122 words
An apparatus for controlling the rotation of a high-speed rotating spindle which comprises a high-speed rotating spindle; bearing means for supporting said rotating spindle in a floating condition by a gas film interposed between the periphery of said bearing means and the periphery of said spindle; a rotatable gas turbine coaxially fixed to said spindle for rotating said spinDle with a high-speed gas jet running therethrough; a common gas source for supplying a pressurized gas directly to said bearing means and indirectly to said turbine; and a pressure reducing means connected to said common gas source for reducing the pressure supplied from said common gas source on the way to the turbine to prevent unstable movement of said spindle during rotation thereof.
Claim 3
Dependent Claim
68 words
An apparatus for controlling the rotation of a high-speed rotating spindle as claimed in claim 1, which further comprises a control means for reducing the pressure to be supplied to said turbine within the safety range from the unstable movement of said spindle, said control means including a spring means and a manually adjustable screw, said spring means being interposed between said screw and said pressure reducing means.
Claim 4
Dependent Claim
96 words
An apparatus for controlling the rotation of a high-speed rotating spindle as claimed in claim 1, which further comprises a rotatable speed detecting means coaxially fixed to said spindle for discharging a gas according to the spindle speed; a throttle valve connected to said pressure reducing means for regulating the gas flow supplied from said pressure reducing means on the way to said speed detecting means; and a speed control means for maintaining the spindle speed nearly constant in response to said speed detecting means in spite of changes in the loads applied to said spindle.
Claim 5
Dependent Claim
68 words
An apparatus for controlling the rotation of a high-speed rotating spindle as claimed in claim 3, which further comprises a control means for reducing the pressure to be supplied to the turbine within the safety range from the unstable movement of said spindle; said control means including a spring means and a manually adjustable screw, said spring means being interposed between said screw and said pressure reducing means.
Claim 6
Dependent Claim
138 words
An apparatus for controlling the rotation of a high-speed rotating spindle as claimed in claim 1, wherein said pressure reducing means comprises a pair of flexible diaphragms; a throttle rod secured to said diaphragms; a valve seat provided to form a throttle portion in cooperation with said throttle rod; and two chambers separated by said diaphragms, one of said chambers receiving the pressure supplied from said common gas source and the other of said chambers receiving the pressure reduced at said throttle portion. Whereby the pressure supplied from said common gas source is controlled and reduced to the pressure to be supplied to said turbine in accordance with the movement of said diaphragms in response to the pressure difference between the pressures in said two chambers to thereby prevent unstable movement of said spindle during the rotation thereof.
Claim 7
Dependent Claim
99 words
An apparatus for controlling the rotation of a high-speed rotating spindle as claimed in claim 3, wherein said speed control means comprises a flexible diaphragm; a throttle rod secured to said diaphragm; a valve seat to form a throttle portion in cooperation with said throttle rod; and two chambers separated by said diaphragm, one of said chambers being led to said speed detecting means and the other chamber being opened to the atmosphere. Whereby the spindle speed is maintained nearly constant in response to said speed detecting means in spite of changes in the loads applied to said spindle.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-05-31 | 1974-11-30 | 1975-06-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-05-31 | 1978-11-30 | 1979-06-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-05-31 | 1982-11-30 | 1983-06-01 | $7700.00 | Window Closed / Lapsed |