Injector pump
US4594057A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 10, 1985 |
| Grant date | Jun 10, 1986 |
| Priority date | — |
| Expiry date | Jun 10, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F11/086
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An injector pump for introducing metered amounts of fluid into a process line which pump typically is actuated by a gas powered timing relay. A diaphragm or other impermeable member mounted in the pump housing defining a pump chamber for the fluid to be pumped and a piston chamber for a piston having a plunger sliding in a plunger guide to define a pressure chamber between the plunger and the diaphragm. A high pressure seal is carried in the plunger guide to provide sealing about the plunger when there is a high pressure in the pressure chamber, while permitting leakage along the plunger when there is a low pressure in the pressure chamber, thereby providing for pumping of measured amounts of fluid which may be under high pressure and/or highly corrosive, while maintaining isolation between the pump mechanism and the fluid.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.