Convertible pump system
US4838768A · kind A · utility
Inventor
Key dates
| Filing date | Apr 1, 1988 |
| Grant date | Jun 13, 1989 |
| Priority date | — |
| Expiry date | Apr 1, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B49/24
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A fluid pump system whose output can be varied by converting it from maximum output to a lesser output and in between by dumping or varying one of its pumping elements or pistons to the inlet side of the pump. More specifically, a pump is provided with two opposed pistons, both of which are connected to inlet and outlet for maximum capacity. The piston chamber of one piston is equipped with a converter line for leading that chamber back to the inlet, whereby only the remaining piston furnishes the pump discharge. Variations in the adjustable mode of the valve is reflected in the action of the pump relief valve to cause increased effectiveness of a jetter line supplied by the pump output.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.