Liquid-flow control apparatus
US4905744A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 23, 1987 |
| Grant date | Mar 6, 1990 |
| Priority date | — |
| Expiry date | Jul 23, 2007 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB67C3/206
- WIPO fieldHandling
- WIPO sectorMechanical engineering
Abstract
A dosing device for filling liquid into containers comprises a filler body and a metering device. The metering device communicates with the interior of a rotary valve through an end cover of the valve housing, the valve including a valve seat and a check valve closure member spring-biased towards the seat. The valve includes first, second and third rotary ports and first and second fixed ports. Downstream of the second fixed port is an anti-drip suction-producing device of a piston-and-cylinder form whereof the stroke of the piston is adjustable. Upstream of the first fixed port is a throttling valve lowerable into an operative position downstream of inlet holes from a liquid-containing tank. For a high viscosity liquid, it is drawn into the metering device through the holes, the first fixed and rotary ports and the end cover, the rotary valve is rotated to align the second rotary port with the second fixed port and to close the first fixed port, and the liquid is then expelled from the metering device through the end cover, the second rotary and fixed ports and an outlet nozzle. A low viscosity liquid is drawn into the metering device through the holes, the lowered throttling valv…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.