US3797962A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Spinning turbine
Assignee: Wilhelm Stahlecker GmbH
•
Filing: 1972-01-25
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Granted: 1974-03-19
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Expires: 1992-01-25
Abstract
Abstract A spinning turbine in which the turbine itself is rotatable within a closed stationary housing in which a pressure below atmospheric is to be maintained. The shaft of the turbine which is to be rotatably mounted outside of the housing, preferably on indirect bearing means, extends through a slightly larger bore in the back wall of the housing or in an annular flange on this back wall so as to form an intermediate annular slot. One or both walls of the slot and/or the back wall of the turbine and/or the inner side of the back wall of the housing are provided with annular grooves which form air chambers to prevent air from passing from the outside to the interior of the housing.
Inventors
- 👤 F Stahlecker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 05:39
CPC Classifications
D; D01; D01H; D01H4/00; D01H4/04; D01H4/08; D01H4/10
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
219 words
A spinning turbine comprising: a rotary turbine element having a back wall and a collar portion, a shaft having said collar portion force-fitted on one end thereof, a stationary housing enclosing said turbine element, means for maintaining said stationary housing at a pressure below atmospheric pressure during the operation of said turbine, said housing including a back wall spaced slightly from said back wall of said turbine element forming a first narrow annular slot, said housing back wall being provided with a bore, said bore being provided in an extension of said housing back wall which substantially corresponds to the length of said collar portion, said shaft and said collar portion being disposed in said bore with said shaft extending to the outside of said housing, said bore having a diameter slightly larger than the diameter of said shaft and said collar portion extending there-through thereby forming a second narrow annular slot between the wall of said bore and the wall of said collar portion, said second narrow annular slot being in communication with said first annular slot, at least one of said walls being provided with a plurality of continuous recesses forming air damming chambers for substantially preventing air to pass from the outside of said stationary housing through said annular slot to the inside of said housing.
Claim 2
Dependent Claim
219 words
A spinning turbine comprising: a rotary turbine element having a back wall and a collar portion, a shaft having said collar portion force-fitted on one end thereof, a stationary housing enclosing said turbine element, means for maintaining said stationary housing at a pressure below atmospheric pressure during the operation of said turbine, said housing including a back wall spaced slightly from said back wall of said turbine element forming a first narrow annular slot, said housing back wall being provided with a bore, said bore being provided in an extension of said housing back wall which substantially corresponds to the length of said collar portion, said shaft and said collar portion being disposed in said bore with said shaft extending to the outside of said housing, said bore having a diameter slightly larger than the diameter of said shaft and said collar portion extending there-through thereby forming a second narrow annular slot between the wall of said bore and the wall of said collar portion, said second narrow annular slot being in communication with said first annular slot, at least one of said walls being provided with a plurality of continuous recesses forming air damming chambers for substantially preventing air to pass from the outside of said stationary housing through said annular slot to the inside of said housing.
Claim 3
Dependent Claim
21 words
A spinning turbIne as defined in claim 1, wherein said recesses form annular grooves in at least one of said walls.
Claim 4
Dependent Claim
40 words
A spinning turbine as defined in claim 1, wherein said recesses form associated annular grooves of a substantially similar cross-sectional shape in opposite parts of at least two of said walls, said associated grooves together forming larger air damming chambers.
Claim 5
Dependent Claim
29 words
A spinning turbine as defined in claim 1, further comprising at least one insert mounted in an aperture in the back wall of said housing and containing said bore.
Claim 6
Dependent Claim
15 words
A spinning turbine as defined in claim 4, in which said insert consists of plastic.
Claim 7
Dependent Claim
58 words
A spinning turbine as defined in claim 4, in which said insert consists of a material having good antifriction properties, and in which during the first period of operation of said turbine after its production said bore in said insert has a diameter nearly equal to the diameter of the part of said shaft extending through said bore.
Claim 8
Dependent Claim
57 words
A spinning turbine as defined in claim 4, in which said insert is adjustable relative to the bottom wall of said housing to permit said bore to be centered relative to the part of said shaft extending through said bore, and means for securing said insert in the adjusted position to said back wall of said housing.
Claim 9
Dependent Claim
61 words
A spinning turbine as defined in claim 7, in which said aperture in the back wall of said housing and the outer peripheral surface of said insert are substantially cylindrical and of substantially the same diameter, said insert being adapted to be turned to different positions within said aperture, said bore in said inset extending eccentrically to said outer surface thereof.
Claim 10
Dependent Claim
83 words
A spinning turbine as defined in claim 4, in which parts of the back wall of said turbine element and of said insert face each other and each of said parts has annular projections and annular recesses between said projections, said projections of one of said parts engaging into said recesses of the other part but the walls of said interengaging projections and recesses being slightly spaced from each other so as to form annular gaps, said gaps forming said air damming chambers.
Claim 11
Dependent Claim
94 words
A spinning turbine as defined in claim 4, further comprising a rotary member secured to and rotatable with said shaft outside of said housing and said insert, parts of said rotary member and of said insert directly facing each other and each having annular projections and annular recesses between said projections, said projections of one of said parts engaging into said recesses of the other part but the walls of said interengaging projections and recesses being slightly spaced from each other so as to form annular gaps, said gaps forming said air damming chambers.
Claim 12
Dependent Claim
108 words
A spinning turbine as defined in claim 1, in which the wall of said bore and the peripheral surface of said shaft part extending through said bore form associated annular steps, said steps decreasing in diameter from the inner side of the back wall of said housing and from the back wall of said turbine element toward the outer side of said housing wall, said steps of said shaft part having slightly smaller diameters than the associated steps of the wall of said bore so as to form said annular slot between said associated steps, said slot having a step-shaped cross section and forming said air damming chambers.
Claim 13
Dependent Claim
33 words
A spinning turbine as defined in claim 1, further comprising air conveying means connected to and rotatable with said turbine element for drawing air from the inside of said housing to the outside.
Claim 14
Dependent Claim
24 words
A spinning turbine as defined in claim 12, in which said air conveying means consist of vanes on said shaft part within said bore.
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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) | 1977-03-18 | 1977-09-17 | 1978-03-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-03-18 | 1981-09-17 | 1982-03-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-03-18 | 1985-09-17 | 1986-03-19 | $7700.00 | Window Closed / Lapsed |