US3747840A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Centrifuge with bowl valve control
Assignee: Individual
•
Filing: 1970-12-29
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Granted: 1973-07-24
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Expires: 1990-12-29
Abstract
Abstract A centrifuge cavity is defined by first and second bowl sections. The first bowl section is attached to the drive shaft for the centrifuge which drive shaft is mounted in a main bearing. The second shaft is hollow which allows a stationary inlet pipe mounted concentrically therein thus defining a space with said hollow shaft which is blocked by sealing means to allow high pressure operation of the centrifuge. All of the centrifuge discs are carried by the main shaft of the centrifuge, so as to leave the second bowl section relatively free for easy and precise movements relative to the first bowl section. The second bowl section is spring loaded in a direction opposite to the first bowl section in order to urge the bowl sections apart, thus allowing sludge build-up at the periphery of the centrifuge cavity to escape. Opposing the force of the spring is a source of fluid under pressure which is directed at the side of the second section which is opposite to the first section so as to urge the bowl sections into mated, closed positions when the pressure of the fluid is sufficiently high to ovecome the force of the spring.
Inventors
- 👤 C Weiland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 19:07
CPC Classifications
B; B04; B04B; B04B11/00; B04B1/00; B04B1/10; B04B1/14
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
In a centrifuge separator having first and second bowl sections defining a centrifuge cavity, said first bowl section being connected to a first rotatably mounted shaft and said second bowl section being connected to a second rotatably mounted shaft, said first and second shafts being mounted coaxially, and drive means connected to said first shaft for rotating said centrifuge and a plurality of discs deposed within said cavity, the improvement comprising a rod means extending from said first shaft for supporting all of said plurality of discs from the first shaft so as to leave said first bowl section free for axial movements which function to open and close the centrifuge cavity, and means for moving said second shaft and second bowl section axially with respect to said first shaft and first bowl section, to separate said bowl sections and allow sludge to discharge therefrom and then to return said bowl sections to contact, including (a) a spring means for urging said first and second bowl sections axially away from each other so as to open the centrifugal cavity to discharge sludge therefrom, and (b) a hydraulic pressure means for urging said first and second bowl sections into mating engagement to effect a closing of the centrifugal cavity.
Claim 2
Dependent Claim
208 words
In a centrifuge separator having first and second bowl sections defining a centrifuge cavity, said first bowl section being connected to a first rotatably mounted shaft and said second bowl section being connected to a second rotatably mounted shaft, said first and second shafts being mounted coaxially, and drive means connected to said first shaft for rotating said centrifuge and a plurality of discs deposed within said cavity, the improvement comprising a rod means extending from said first shaft for supporting all of said plurality of discs from the first shaft so as to leave said first bowl section free for axial movements which function to open and close the centrifuge cavity, and means for moving said second shaft and second bowl section axially with respect to said first shaft and first bowl section, to separate said bowl sections and allow sludge to discharge therefrom and then to return said bowl sections to contact, including (a) a spring means for urging said first and second bowl sections axially away from each other so as to open the centrifugal cavity to discharge sludge therefrom, and (b) a hydraulic pressure means for urging said first and second bowl sections into mating engagement to effect a closing of the centrifugal cavity.
Claim 3
Dependent Claim
204 words
In a centrifuge separator having first and second bowl sections defining a centrifuge cavity, said first bowl section being connected to a first rotatably mounted shaft and said second bowl section being connected to a second rotatably mounted shaft, said first and second shafts being mounted coaxially, and drive means connected to said first shaft for rotating said centrifuge and a plurality of discs deposed within said cavity, the improvement comprising a rod means extending from said first shaft for supporting all of said plurality of discs from the first shaft so as to leave said first bowl section free for axial movements which function to open and close the centrifuge cavity, and means for moving said second shaft and second bowl section axially with respect to said first shaft and first bowl section, to separate said bowl sections and allow sludge discharge therefrom and then to return said bowl sections to contact, including a stationary member, a collar attached to said second shaft, a spring mounted in compression between said collar and said stationary member for moving said second bowl section away from said first bowl section, and fluid pressure means for urging said second section into mating engagement with said first section.
Claim 4
Dependent Claim
204 words
In a centrifuge separator having first and second bowl sections defining a centrifuge cavity, said first bowl section being connected to a first rotatably mounted shaft and said second bowl section being connected to a second rotatably mounted shaft, said first and second shafts being mounted coaxially, and drive means connected to said first shaft for rotating said centrifuge and a plurality of discs deposed within said cavity, the improvement comprising a rod means extending from said first shaft for supporting all of said plurality of discs from the first shaft so as to leave said first bowl section free for axial movements which function to open and close the centrifuge cavity, and means for moving said second shaft and second bowl section axially with respect to said first shaft and first bowl section, to separate said bowl sections and allow sludge discharge therefrom and then to return said bowl sections to contact, including a stationary member, a collar attached to said second shaft, a spring mounted in compression between said collar and said stationary member for moving said second bowl section away from said first bowl section, and fluid pressure means for urging said second section into mating engagement with said first section.
Claim 5
Dependent Claim
66 words
The centrifuge of claim 2 wherein said fluid pressure means operates at a sufficiently high pressure to normally maintain the bowl sections closed against the urging of said spring means, and including means for reducing the pressure in said pressure means, during a centrifuging operation, to a sufficiently low level to permit an automatic opening of the centrifugal cavity by the urging of said spring means.
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) | 1976-07-23 | 1977-01-22 | 1977-07-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-07-23 | 1981-01-22 | 1981-07-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-07-23 | 1985-01-22 | 1985-07-24 | $7700.00 | Window Closed / Lapsed |