High pressure pumping apparatus for semi-fluid material
US4345883A · kind A · utility
Inventors
Key dates
| Filing date | Jun 11, 1979 |
| Grant date | Aug 24, 1982 |
| Priority date | — |
| Expiry date | Jun 11, 1999 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF04B15/023
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
Concrete is transmitted from a hopper forming a part of a mobile concrete pumping apparatus to the deposit site through a flow line having a Y-pipe inlet. The pumping apparatus includes two piston-cylinder concrete pumps mounted in side-by-side relationship adjacent the hopper, which has an auger to rapidly charge a pump with concrete through one of two discharge pipes. Each pump is pivotally mounted, to locate the cylinder aligned with the discharge pipe or with one inlet of the Y-pipe inlet. Each pump has a valve plate pivoting with the cylinder to alternately close the hopper opening and the inlet line. Hydraulic cylinder units are coupled to the valve plates to pivot the pumps. A floating valve plate has coupling pipes attached to the hopper and a hydraulic cylinder urges the same into sliding sealing engagement with the rotating valve plate. The pumps are individually, alternately and oppositely positioned for charging and discharging, with a common discharge period at the end of the one pump unit and start of the other pump unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.