Speed regulating device including planetary gearing and a hydraulic unit or variable volume
Abstract
Abstract A device for use in regulating the difference in speeds between two rotating elements, for instance a pair of rolls forming a crepe nip in a papermaking machine, includes a planetary gearing connected to one of the rotating elements so that a member carrying the planet wheels of the gearing rotates at a speed which has a constant ratio with respect to the rotating speed of the rotating element. In the planetary gearing there is a toothed annulus engaging and surrounding the planet wheels, and this annulus is arranged to rotate at a constant speed ratio with respect to the other one of the rotating elements. A hydraulic pump and motor arrangement is connected to the device so that the flow produced by the pump is dependent on the rotating speed of the last mentioned rotating element, and so that the motor determines the speed of the sun wheel of the planetary gearing. The rotating speed of the sun wheel can be regulated by changing the piston displacement volume in either the pump or the motor, or in both of them. Changes in the speed of the sun wheel cause corresponding changes in the speed of the rotating element connected to the planet wheel carrier.
Inventors
- 👤 L Gullberg
Bibliographic Details
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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) | 1977-09-09 | 1978-03-11 | 1978-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-09 | 1982-03-11 | 1982-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-09 | 1986-03-11 | 1986-09-10 | $7700.00 | Window Closed / Lapsed |