Patent US3753351A successfully refreshed from Google Patents.
US3753351A
Expired / Lapsed
US
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Energy regaining apparatus and method for accelerating and decelerating centrifuges
Assignee: BWS Technologie GmbH
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Filing: 1972-02-24
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Granted: 1973-08-21
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Expires: 1992-02-24
Abstract
Abstract A set of centrifuges is driven by the hydraulic motors of a set of hydrostatic transmissions whose adjustable pumps have shafts positively connected for rotation with a drive motor. By adjustment of the respective pump, any centrifuge can be accelerated and decelerated. A decelerated centrifuge regains energy for driving the respective hydraulic motor to pump fluid so that the respective pump operates as a motor and aids in driving a centrifuge which is being accelerated.
Inventors
- 👤 K Pause
- 👤 W Steprath
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 16:34
CPC Classifications
B; B04; B04B; B04B9/00; B04B9/06
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
139 words
Energy regaining apparatus for accelerating and decelerating centrifuges and other rotary masses, comprising drive means; a set of hydrostatic transmissions, each including a hydraulic motor, and an adjustable pump driving the respective hydraulic motor, and having regulating means for varying the flow to the respective hydraulic motor; distributing means mechanically connecting said drive means with said adjustable pumps for rotation together; and a set of centrifuges individually driven by said hydraulic motors, respectively, to accelerate and decelerate depending on the adjustment of the respective hydraulic pump by said regulating means so that energy, regained during deceleration of a centrifuge, causes the respective hydraulic motor to pump fluid to the respective pump so as to operate the same as a hydraulic motor supplying the regained energy to said distributing means and thereby to an other centrifuge which is being accelerated.
Claim 2
Dependent Claim
139 words
Energy regaining apparatus for accelerating and decelerating centrifuges and other rotary masses, comprising drive means; a set of hydrostatic transmissions, each including a hydraulic motor, and an adjustable pump driving the respective hydraulic motor, and having regulating means for varying the flow to the respective hydraulic motor; distributing means mechanically connecting said drive means with said adjustable pumps for rotation together; and a set of centrifuges individually driven by said hydraulic motors, respectively, to accelerate and decelerate depending on the adjustment of the respective hydraulic pump by said regulating means so that energy, regained during deceleration of a centrifuge, causes the respective hydraulic motor to pump fluid to the respective pump so as to operate the same as a hydraulic motor supplying the regained energy to said distributing means and thereby to an other centrifuge which is being accelerated.
Claim 3
Dependent Claim
28 words
Apparatus as claimed in claim 1 wherein said drive means includes an electromotor; and wherein said distributing means include mechanical means positively interconnecting said pumps for simultaneous rotation.
Claim 4
Dependent Claim
15 words
Apparatus as claimed in claim 1 wherein said distributing means includes a mechanical gear transmission.
Claim 5
Dependent Claim
66 words
Apparatus as claimed in claim 1 wherein each of said pumps has a pump shaft; wherein said distributing means include a transmission connecting said pump shafts for rotation together, said transmission having an input shaft; wherein said drive means include a fly wheel on said input shaft, one drive motor driving said input shaft, and a slip clutch between said drive motor and said fly wheel.
Claim 6
Dependent Claim
49 words
Apparatus as claimed in claim 1 wherein said drive means include a drive motor having an axis; wherein said pumps have axes aligned with said axis; and wherein said distributor means include shaft means connecting said drive motor with said pumps and having an axis coinciding with said axes.
Claim 7
Dependent Claim
36 words
Apparatus as claimed in claim 5 wherein at least one pump is located on either side of said drive motor; and wherein said drive motor has two output shafts on opposite sides for driving said pumps.
Claim 8
Dependent Claim
85 words
Apparatus as claimed in claim 1 comprising a set of control devices respectively associated with said hydrostatic transmissions, each control device including a cylinder, and a piston in said cylinder connected with said regulating means for operating the latter, a source of pressure fluid, conduit means connecting said source with said cylinder, and control valve means in said conduit means operable for controlling the flow of fluid into said cylinder so that said piston and thereby said regulating means can be moved in opposite directions.
Claim 9
Dependent Claim
86 words
Apparatus as claimed in claim 7 wherein said piston forms two end chambers in said cylinder; wherein said source includes an auxiliary pump driven from said drive means by said distributing means; wHerein said conduit means include a high pressure conduit and a low pressure conduit connecting said auxiliary pump with said chambers, respectively; and wherein said control valve means controls said conduits, and has first and third positions for reversing the pressure acting in said chambers, and an intermediate second position for holding said piston.
Claim 10
Dependent Claim
56 words
Apparatus as claimed in claim 8 wherein each hydrostatic transmission includes two connecting conduits connecting the inlet and outlet means of said pump with the outlet and inlet means of said hydraulic motor; and wherein said control device includes pressure limiting valves in said high pressure and low pressure conduits connected with said connecting conduits, respectively.
Claim 11
Dependent Claim
76 words
Method for regaining energy from decelerated centrifuges and other rotary masses, comprising accelerating and decelerating at least two centrifuges by hydrostatic transmissions including hydraulic pumps driven by a common drive motor; and decelerating one centrifuge while the other centrifuge is accelerated so that the energy regained by deceleration of one centrifuge causes operation of the respective hydraulic pump as a hydraulic motor reducing the load on said common drive motor during acceleration of the other centrifuge.
Claim 12
Dependent Claim
76 words
Method for regaining energy from decelerated centrifuges and other rotary masses, comprising accelerating and decelerating at least two centrifuges by hydrostatic transmissions including hydraulic pumps driven by a common drive motor; and decelerating one centrifuge while the other centrifuge is accelerated so that the energy regained by deceleration of one centrifuge causes operation of the respective hydraulic pump as a hydraulic motor reducing the load on said common drive motor during acceleration of the other centrifuge.
References Cited (Backward Citations)
US2846849A
Cited
US3279172A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-08-20 | 1977-02-19 | 1977-08-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-08-20 | 1981-02-19 | 1981-08-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-08-20 | 1985-02-19 | 1985-08-21 | $7700.00 | Window Closed / Lapsed |