US3601307A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge with spindle-sealing means
Assignee: Pennwalt Corp
•
Filing: 1970-03-19
•
Granted: 1971-08-24
•
Expires: 1990-03-19
Abstract
Abstract A sealing structure is provided between a centrifuge bowl and its surrounding cover to prevent process fluids existing between the centrifuge bowl and the cover from vibrating lubricant surrounding the bearings for the main spindle.
Inventors
- 👤 Leonard Shapiro
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:08
CPC Classifications
F; F16; F16J; F16J15/00; F16J15/16; F16J15/40; B; B04; B04B; B04B9/00; B04B9/12
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
169 words
In a centrifuge: a. a cover; b. a centrifuge bowl having a separation chamber disposed therein, said centrifuge bowl having inlet and outlet means adapted to admit a feed mixture into said separation chamber and discharge a separated material therefrom, said centrifuge bowl being disposed within said cover and defining a first annular space between adjacent surfaces of said cover and said bowl; c. spindle means connected to said centrifuge bowl, said spindle means being adapted to rotate about its longitudinal axis; d. a spindle housing surrounding a portion of said spindle means and defining a second annular sPace between adjacent surfaces of said spindle means and said spindle housing; e. sealing structure comprising an annular sealing member disposed between said spindle means and said spindle housing whereby said second annular space is divided into a first annular zone and a second annular zone, and means disposed between said second annular zone and said first annular space for pumping from said second annular zone into said first annular space.
Claim 2
Dependent Claim
169 words
In a centrifuge: a. a cover; b. a centrifuge bowl having a separation chamber disposed therein, said centrifuge bowl having inlet and outlet means adapted to admit a feed mixture into said separation chamber and discharge a separated material therefrom, said centrifuge bowl being disposed within said cover and defining a first annular space between adjacent surfaces of said cover and said bowl; c. spindle means connected to said centrifuge bowl, said spindle means being adapted to rotate about its longitudinal axis; d. a spindle housing surrounding a portion of said spindle means and defining a second annular sPace between adjacent surfaces of said spindle means and said spindle housing; e. sealing structure comprising an annular sealing member disposed between said spindle means and said spindle housing whereby said second annular space is divided into a first annular zone and a second annular zone, and means disposed between said second annular zone and said first annular space for pumping from said second annular zone into said first annular space.
Claim 3
Dependent Claim
17 words
The combination claimed in claim 1, including passage means for admitting gas into said second annular zone.
Claim 4
Dependent Claim
56 words
The combination claimed in claim 1, in which said means for pumping from said second annular zone into said first annular space comprises an annular flange and a cooperating annular groove adapted to rotate with respect to each other, said annular flange and said annular groove being disposed on said spindle means and said spindle housing.
Claim 5
Dependent Claim
28 words
The combination claimed in claim 3, in which said sealing member has spiral grooves disposed therein for pumping from said second annular zone into said first annular zone.
Claim 6
Dependent Claim
16 words
The combination claimed in claim 4, including passage means for admitting gas into said second zone.
Claim 7
Dependent Claim
44 words
The combination claimed in claim 5, including filter means disposed within said passage means for filtering said gas. 7, The combination claimed in claim 6, in which said annular flange is projected from said spindle means in a direction parallel to said longitudinal axis.
Claim 8
Dependent Claim
44 words
The combination claimed in claim 7, wherein said spindle means comprises a spindle and a sleeve member surrounding said spindle, said annular flange being disposed on said sleeve member, and said annular sealing member is disposed between said spindle housing and said sleeve member.
Claim 9
Dependent Claim
59 words
The combination claimed in claim 8, including housing structure, said spindle housing being disposed adjacent to said housing structure, and defining a third annular space between adjacent surfaces of said spindle housing and said housing structure, a clipper seal disposed between said spindle housing and said housing structure for sealing said first annular space from said third annular space.
Claim 10
Dependent Claim
29 words
The combination claimed in claim 1, in which said annular sealing member has spiral grooves disposed therein for pumping from said second annular zone into said first annular zone.
References Cited (Backward Citations)
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Cited
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Cited
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Cited
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Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-08-23 | 1975-02-22 | 1975-08-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-23 | 1979-02-22 | 1979-08-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-23 | 1983-02-22 | 1983-08-24 | $7700.00 | Window Closed / Lapsed |