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US3840309A Expired / Lapsed US ⏱️ 0.0 years remaining

Centrifugal machine

Assignee: Klein Schanzlin and Becker AG
•
Filing: 1973-10-05
•
Granted: 1974-10-08
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Expires: 1993-10-05
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Abstract

Abstract A centrifugal machine, such as a centrifugal pump, has a support and a propeller shaft which is rotatably mounted on the support. A plurality of propeller vanes are mounted on the propeller shaft for rotation with the same and can be moved between at least two inclined positions relative to the axis of the propeller shaft. An arrangement is provided for moving the vanes between their positions, and a drive is provided for activating this arrangement. The drive includes a drive shaft coaxial with the propeller shaft and rotatable relative to the same, being connected to the adjusting arrangement. A rotor of an electromotor is mounted on the drive shaft for rotation with the same and a stator surrounds the rotor and is mounted on the support. A sleeve is mounted on an end portion of the propeller shaft for rotation with the same, and this sleeve is interposed between and out of contact with the stator and the rotor and fluid-tightly surrounds the latter.

Inventors

  • 👤 H Eckes
  • 👤 Schanzlin Becker Klein

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-11-01 15:15
CPC Classifications
F; F04; F04D; F04D15/00; F04D15/0055; F01; F01D; F01D7/00; F05; F05D; F05D2260/00; F05D2260/70; F05D2260/74; F05D2260/76

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 152 words
In a machine of the character described, a combination comprising a support; a propeller shaft rotatably mounted on said support and having an end portion; a plurality of propeller vanes mounted on said propeller shaft for rotation therewith and for movement between at least two inclined positions relative to an axis of said propeller shaft; moving means for effecting movement of said vanes between said positions; and drive means for said moving means, including a drive shaft coaxial with said propeller shaft and rotatable relative to the same and connected to said moving means, a electric rotor mounted on said drive shaft for rotation therewith, a electric stator surrounding said rotor and mounted on said support, and a sleeve mounted on said end portion of said propeller shaft for rotation with the same, said sleeve being interposed between and out of contact with said staTor and rotor and fluid-tightly surrounding the latter.
Claim 2
Dependent Claim 152 words
In a machine of the character described, a combination comprising a support; a propeller shaft rotatably mounted on said support and having an end portion; a plurality of propeller vanes mounted on said propeller shaft for rotation therewith and for movement between at least two inclined positions relative to an axis of said propeller shaft; moving means for effecting movement of said vanes between said positions; and drive means for said moving means, including a drive shaft coaxial with said propeller shaft and rotatable relative to the same and connected to said moving means, a electric rotor mounted on said drive shaft for rotation therewith, a electric stator surrounding said rotor and mounted on said support, and a sleeve mounted on said end portion of said propeller shaft for rotation with the same, said sleeve being interposed between and out of contact with said staTor and rotor and fluid-tightly surrounding the latter.
Claim 3
Dependent Claim 35 words
A combination as defined in claim 1; further comprising a spoked flow-guiding element having a hollow hub, and wherein said sleeve, rotor and stator are at least partially located within the confines of said hub.
Claim 4
Dependent Claim 22 words
A combination as defined in claim 2, wherein said support forms a suction nozzle, and said element is located in said nozzle.
Claim 5
Dependent Claim 59 words
A combination as defined in claim 1, wherein said propeller shaft includes a casing mounted on and rotatable with said end portion and having an opening coaxial with said axis; said drive shaft extending through said opening and having one portion located within and another portion located without said casing, and said rotor being mounted on said other portion.
Claim 6
Dependent Claim 45 words
A combination as defined in claim 4, wherein said sleeve is coaxial with said opening exteriorly of said casing, said sleeve having an open end in registry with said opening and sealingly connected with said casing, and a closed end remote from said open end.

References Cited (Backward Citations)

No citation records indexed.

USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1977-10-07 1978-04-08 1978-10-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-07 1982-04-08 1982-10-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-07 1986-04-08 1986-10-08 $7700.00 Window Closed / Lapsed

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