Metering pump having a tubular seal for sealing a main liquid from an auxiliary liquid
US6129526A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Oct 10, 2000 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B13/02
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A metering pump includes a motor compartment with a drive compartment defining a drive chamber. The drive chamber has an inlet and an outlet for a main liquid. A drive piston is moveably arranged in reciprocating translational motion in the drive chamber. A controller for controlling the movement of the drive piston under the action of the main liquid. A metering compartment defines a metering chamber. The metering chamber has an inlet and an outlet for an auxiliary liquid. The outlet for the metering chamber is separated from the outlet of the driving chamber. A metering piston is arranged in the metering chamber. The metering piston is driven by the drive piston. A frustoconical sealing member is arranged with its small base facing the drive compartment. An extension of the metering piston has a diameter smaller than a body of the metering piston. The extension and the frustoconical sealing member form a suction valve. A suction-delivery portion is arranged on the metering piston. An extendable tubular element has a first end sealingly fastened to a tubular part that is fixed to the drive chamber. The metering chamber is connected to the drive chamber via the tubular part. A seco…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.