Method and apparatus for sustaining an oscillatory movement
US4503767A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1981 |
| Grant date | Mar 12, 1985 |
| Priority date | — |
| Expiry date | May 26, 2001 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01F2015/048
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method and apparatus for sustaining the oscillatory movement of an oscillating device of the type comprising a mass oscillating between dead points on opposite sides of a point of equilibrium, with a potential force acting to return the mass toward the point of equilibrium. This potential force is greatest at the dead points and the speed of the oscillating point is greatest adjacent the point of equilibrium. A force is applied to the device from a motive source, which force is greater than the maximum potential force at a speed lower than the speed of the device adjacent the point of equilibrium. The force of the motive source is applied to the oscillating device on the portion of the path of movement of the oscillating device preceding one of the dead points, and the application speed of the force of the motive source is higher than what would be the instantaneous speed of the oscillating device along that portion of its trajectory were the force of the motive source not applied. In other words, when the mass slows down approaching a dead point, we give it a push. The device is particularly useful in a hay baler of the type producing small, very dense blocks of hay.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.