Hydraulic fluid injection apparatus
US4971105A · kind A · utility
Inventor
Key dates
| Filing date | Jan 16, 1990 |
| Grant date | Nov 20, 1990 |
| Priority date | — |
| Expiry date | Jan 16, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T137/8597
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A hydraulic fluid injection apparatus is described that has a container that has a chamber with a first, second and return means section. There are two pistons with a seal means on each piston and the two pistons are connected by a rod. Input fluid pressure by a pressurized first fluid, such as water, on the first piston causes the second piston to move and pressurize a second fluid, such as an insecticide, out of the second section and into a mixing line, through a calibrated metering means and into an output fluid line to be joined by the first fluid arriving from the first section of the chamber. There is a mixing means in the output fluid line to mix the two fluids more thoroughly. There is a return means in the return means section of the chamber that returns the second piston to a lower position when the pressure on the first piston is less than the return force of the return means and allows the second section to be refilled as necessary. A number of one-way valves are supplied to allow fluid movement in only the desired direction. A stop means in the first section limits the travel of the first piston.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.