Material spreader
US5294060A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 22, 1992 |
| Grant date | Mar 15, 1994 |
| Priority date | — |
| Expiry date | Jun 22, 2012 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA01C15/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A material spreader includes a support frame and a pair of ground engaging wheels for rollingly supporting the frame. A hopper is attached to the support frame and includes first and second isolated chambers for holding first and second materials, respectively, to be spread. A first series of discharge openings in the bottom of the first chamber allows material to be discharged from the first chamber. A second series of discharge openings in the bottom of the second chamber allows material to be discharged from the second chamber. Slide valves are operable to selectively independently control the flow of material through the first and second series of discharge openings. A series of passages in a distribution manifold interconnect the first and second series of discharge openings. Each passage is isolated from the other passages and has two inlets and one outlet. One of the inlets to each passage is in the first series of discharge openings and the other one of the inlets to each passage is in the second series of discharge openings. The outlets of the passages discharge material onto an impeller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.