Implements for delivering particulate material to the ground
US4030641A · kind A · utility
20Cited by
6References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1975 |
| Grant date | Jun 21, 1977 |
| Priority date | — |
| Expiry date | Jul 11, 1995 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01C17/006
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A spreader for fertilizer or similar material has a metering mechanism for said material to vary the rate of spreading. The metering mechanism has two metering members in face-to-face contact defining a metering opening. A hydraulic ram moves the metering members so as to open and close the opening. An adjustable stop within the ram allows the ram's stroke to be changed. This changes the extent to which the ram can open the opening so that the ram can be supplied with fluid under sufficient pressure to overcome possible corrosion between the metering members.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.