US4116592A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbomolecular high-vacuum pulp
Assignee: Individual
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Filing: 1976-08-20
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Granted: 1978-09-26
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Expires: 1996-08-20
Abstract
Abstract A turbomolecular high-vacuum pump has a substantially vertically extending cylindrical casing provided with inlet and outlet pipes for gas being evacuated. The casing accommodates, in the top part thereof, a stator having vanes disposed between the rotor vanes so as to define passages for gas being evacuated. The rotor is connected to a high-speed hollow shaft extending substantially vertically. The shaft is journalled in bearings and connected to the rotor by means of a high-frequency electric drive motor. The pump incorporates means for lubricating the bearings. The stator of the high-frequency drive motor of the pump is electrically coupled to the stator of a generator of a machine-type frequency converter which has an induction drive motor. Another, low-speed shaft is journalled in the bearings in the bottom part of the pump casing coaxially with the high-speed shaft, one shaft embracing the other. The induction motor rotor and the rotor of the generator of the machine-type frequency converter are mounted on the low-speed shaft, the stators of both devices being fixed within the pump casing. Means for lubricating the bearings of both shafts is disposed at the lower end of the low-speed shaft.
Inventors
- 👤 Viktor Yakovlevich Cherny
- 👤 Boris Grigorievich Galperin
- 👤 Mikhail Mikhailovich Mikhailov
- 👤 Vladimir Petrovich Meljukhov
- 👤 Leonid Vasilievich Dobrokhotov
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 11:42
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/06; F04D29/063; F04D19/00; F04D19/02; F04D19/04; F04D19/042; F04D25/00; F04D25/02; F04D25/06; F04D25/0606; F04D29/58; F04D29/582; F04D29/584; F16; F16C; F16C33/00; F16C33/30; F16C33/66; F16C2360/00; F16C2360/44; F16C2360/45
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
302 words
A turbomolecular high-vacuum pump comprising: a substantially vertically extending cylindrical casing; an inlet pipe for gas being evacuated provided on said casing; an outlet pipe for gas being evacuated provided on said casing; a pump stator having vanes accommodated in said casing, in the top part thereof; a pump rotor having vanes accommodated in said casing, said vanes being disposed between said stator vanes to define passage for gas being evacuated; bearings arranged within said casing; a substantially vertically arranged high-speed hollow shaft extending within said casing, in the top part thereof, said shaft extending coaxially with said casing, being journalled in said bearings and connected to said rotor; other bearings arranged within said casing; a hollow low-speed shaft extending in the bottom part of said casing coaxially with said high-speed shaft, said low-speed shaft being journalled in said other bearings; said shafts embracing each other at the ends facing each other for a part of their length; a high-frequency electric drive motor arranged within said casing; a rotor of said high-frequency electric drive motor connected to said high-speed shaft; a stator of said high-frequency electric drive motor mounted in said casing; a machine-type electric frequency converter accommodated in said casing; an induction drive motor connected to said machine-type frequency converter being energizable through a source of power; a generator electrically coupled to said machine-type frequency converter of said high frequency electric drive motor; a rotor of said induction drive motor being mounted on said low-speed shaft; a stator of said induction motor being fixed to said casing; a stator of said generator being fixed to said casing and electrically coupled to said stator of said high-frequency electric drive motor; means for lubricating the bearings, said means being arranged within said casing and mounted at the lower end of said low-speed shaft.
Claim 2
Dependent Claim
302 words
A turbomolecular high-vacuum pump comprising: a substantially vertically extending cylindrical casing; an inlet pipe for gas being evacuated provided on said casing; an outlet pipe for gas being evacuated provided on said casing; a pump stator having vanes accommodated in said casing, in the top part thereof; a pump rotor having vanes accommodated in said casing, said vanes being disposed between said stator vanes to define passage for gas being evacuated; bearings arranged within said casing; a substantially vertically arranged high-speed hollow shaft extending within said casing, in the top part thereof, said shaft extending coaxially with said casing, being journalled in said bearings and connected to said rotor; other bearings arranged within said casing; a hollow low-speed shaft extending in the bottom part of said casing coaxially with said high-speed shaft, said low-speed shaft being journalled in said other bearings; said shafts embracing each other at the ends facing each other for a part of their length; a high-frequency electric drive motor arranged within said casing; a rotor of said high-frequency electric drive motor connected to said high-speed shaft; a stator of said high-frequency electric drive motor mounted in said casing; a machine-type electric frequency converter accommodated in said casing; an induction drive motor connected to said machine-type frequency converter being energizable through a source of power; a generator electrically coupled to said machine-type frequency converter of said high frequency electric drive motor; a rotor of said induction drive motor being mounted on said low-speed shaft; a stator of said induction motor being fixed to said casing; a stator of said generator being fixed to said casing and electrically coupled to said stator of said high-frequency electric drive motor; means for lubricating the bearings, said means being arranged within said casing and mounted at the lower end of said low-speed shaft.
Claim 3
Dependent Claim
55 words
A turbomolecular high-vacuum pump according to claim 1, comprising: a bottom wall having a central cylindrical orifice which seals the end of said high-speed shaft facing the end of said low-speed shaft, said high-speed shaft having a cylindrical inner space; the diameter of said orifice being smaller than the inside diameter of said high-speed shaft.
Claim 4
Dependent Claim
108 words
A turbomolecular high-vacuum pump according to claim 1, wherein said means for lubricating the bearings comprises: an oil tank; a cylindrical sleeve mounted in said tank and communicating therewith; a helical groove provided on the outer surface of said low-speed shaft for a part of its length which is received, with minimum radial space, in said cylindrical sleeve; the end of said low-speed shaft facing said oil tank being tightly sealed; an annular groove provided on said low-speed shaft in the zone of termination of said helical groove; radial passages provided in said low-speed shaft establishing communication of said annular groove with the inner space of said shaft.
Claim 5
Dependent Claim
111 words
A turbomolecular high-vacuum pump according to claim 2, wherein said means for lubricating the bearings comprises: an oil tank; a cylindrical sleeve mounted in said oil tank and communicating therewith; a helical groove provided on the outer surface of said low-speed shaft for a part of its length the low-speed shaft being received with minimum radial space in said cylindrical sleeve; the end of said low-speed shaft facing said oil tank being tightly sealed; an annular groove provided on said low-speed shaft in the zone of termination of said helical groove; radial passages provided in said low-speed shaft establishing communication of said annular groove with the inner space of said shaft.
Claim 6
Dependent Claim
54 words
A turbomolecular high-vacuum pump according to claim 1, includng: a partition which divides the inner space of said casing into two parts, one part accommodating said stator and rotor of the pump, and the other part accommodating said machine-type frequency converter and high-frequency electric drive motor, the latter part communicating with said outlet pipe.
Claim 7
Dependent Claim
54 words
A turbomolecular high-vacuum pump according to claim 2, including: a partition which divides the inner space of said casing into two parts, one part accommodating said stator and rotor of the pump, and the other part accommodating said machine-type frequency converter and high-frequency electric drive motor, the latter part communicating with said outlet pipe.
Claim 8
Dependent Claim
54 words
A turbomolecular high-vacuum pump according to claim 3, including: a partition which divides the inner space of said casing into two parts, one part accommodating said stator and rotor of the pump, and the other part accommodating said machine-type frequency converter and high-frequency electric drive motor, the latter part communicating with said outlet pipe.
Claim 9
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 1, including: an annular permanent magnet mounted within said casing; a disc of a ferromagnetic material mounted on said high-speed shaft and arranged in the magnetic field of said annular permanent magnet.
Claim 10
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 2, including: an annular permanent magnet mounted within said casing; a disc of a ferromagnetic material mounted on said high-speed shaft and arranged in the magnetic field of said annular permanent magnet.
Claim 11
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 3, including: an annular permanent magnet mounted within said casing; a disc of a ferromagnetic material mounted on said high-speed shaft and arranged in the magnetic field of said annular permanent magnet.
Claim 12
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 5, including: an annular permanent magnet mounted within said casing; a disc of a ferromagnetic material mounted on said high-speed shaft and arranged in the magnetic field of said annular permanent magnet.
Claim 13
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 1, wherein said rotor of the generator of said machine-type frequency converter comprises a claw-shaped rotor having: claws of a magnetically conductive material; at least one permanent magnet mounted between said claws.
Claim 14
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 2, wherein said rotor of the generator of said machine-type frequency converter comprises a claw-shaped rotor having claws of a magnetically conductive material; at least one permanent magnet mounted between said claws.
Claim 15
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 3, wherein said rotor of the generator of said machine-type frequency converter comprises a claw-shaped rotor having: claws of a magnetically conductive material; at least one permanent magnet mounted between said claws.
Claim 16
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 5, wherein said rotor of the generator of said machine-type frequency converter comprises a claw-shaped rotor having: claws of a magnetically conductive material; at least one permanent magnet mounted between said claws.
Claim 17
Dependent Claim
39 words
A turbomolecular high-vacuum pump according to claim 8, wherein said rotor of the generator of said machine-type frequency converter comprises a claw-shaped rotor having: claws of a magnetically conductive material; at least one permanent magnet mounted between said claws.
References Cited (Backward Citations)
GB746920A
Cited
US3168977A
Cited
US3749528A
Cited
US3628894A
Cited
US3753623A
Cited
US3947193A
Cited
DE2349033A1
Cited
US3969042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-09-25 | 1982-03-27 | 1982-09-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-09-25 | 1986-03-27 | 1986-09-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-09-25 | 1990-03-27 | 1990-09-26 | $7700.00 | Window Closed / Lapsed |