Lifting mechanism with cam
US4239086A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 13, 1978 |
| Grant date | Dec 16, 1980 |
| Priority date | — |
| Expiry date | Sep 13, 1998 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20396
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A relatively compact and lightweight planting and fertilizing apparatus is attached to a small garden tractor by a universal hitch which restricts lateral movement between the two. The apparatus is spring biased downwardly to assure firm contact with the ground, and can be raised above the ground by a single lever. The lever carries the biasing spring, and cams lifting bearings on the lever against a lifting plate on the apparatus. The fertilizer is fed by an axially adjustable feed gear rotated by a ground engaging wheel on the apparatus. The feed gear is biased by an adjusting spring against a threaded adjusting knob which sets the axial position of the feed gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.