Method and apparatus for an aerator with differential, steering assist and power lifting
US6708773B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 12, 2002 |
| Grant date | Mar 23, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2022 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B45/026
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An aerator that allows the operator to make a turn with the machine while the tines are still in contact with the turf through the use of a differential shaft and brakes that enhance the maneuverability of the machine. The aerator is fitted with a mechanical gear type differential on an intermediate drive shaft that provides for automatic, separate and variable rotational motion of the individual halves of the tine shaft. This differential apparatus also provides constant and equal torque application to both sides of the tine wheel assembly simultaneously while the machine is operating. This insures that tine penetration into the turf is equal on both sides at all times. The tine shaft halves are designed and mounted in such manner as to allow each half (left and right sides) to be driven by separate chains from the differential shaft. This design results in a desired variation in the speed of rotation of the two halves that facilitates turning the unit. The differential mechanism is also functional in driving the transport rollers at the front of the machine. The improved aerator is also fitted with brakes installed on each side of the unit which can reduce the speed of rotation o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.