Tank spreader
US4108380A · kind A · utility
8Cited by
11References
34Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Mar 10, 1977 |
| Grant date | Aug 22, 1978 |
| Priority date | — |
| Expiry date | Mar 10, 1997 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/86831
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A liquid manure spreading apparatus having a tank and a pump selectively operable to evacuate air from within the tank or supply air to the tank. A safety shut off valve located in the tank having a ball and an elongated float confined in a cage is operable to block the evacuation of air from the tank when the tank is full of liquid manure. A control valve mounted on the pump has a single spool selectively moveable with a handle to an air evacuating position and an air supplying position. A single air line is connected to the valve and tank.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.