Turf aerating apparatus
US4867244A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Sep 19, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01B45/023
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A walk-behind turf aerating apparatus includes two pairs of tine arm assemblies, each assembly having a pair of vertically reciprocating tine arms for driving coring tines into the turf. A tine arm return mechanism includes a gear box for each pair of tine arms, the lower ends of the tine arms being connected to cranks extending from the gear box to reposition the tine arms prior to ground engagement. Stops are provided to limit the tine arm travel. A spring-loaded lifting mechanism permits manual shifting of the tine arm mechanism from a lowered ground-engaging position to a raised transport position. A belt drive with clutch and reduction drive for the wheels also drives the tine arm mechanism with automatic disengagement when the wheels are in the transport position. A handle assembly is connected to the apparatus frame through a pivotal connection including vibration damping elements for minimizing transmittal of vibrations, particularly in the vertical plane, to the handle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.