Slurry pump with discharge cylinders, especially two-cylinder concrete pump
US5316453A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 19, 1993 |
| Grant date | May 31, 1994 |
| Priority date | — |
| Expiry date | Mar 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S417/90
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
A slurry pump for mixing concrete includes a charge funnel, a pair of discharge cylinders, and a discharge line operable with each other to form a slurry flow control. A control valve has an exit port connected with the discharge line and an entrance port that is alternatively positioned in front of an opening of each discharge cylinder. A pair of gate valve disks are positioned one on each side of the entrance port. The size of each gate valve disk conforms to a surface between the discharge cylinder openings such that in a change-over midpoint of the control valve the openings of the discharge cylinders are sealed off by the gate valve disks, and the entrance port and the control valve is sealed off on the surface between the discharge cylinders for the execution of a partial stroke a discharge cylinder piston which compresses the drawn in slurry. A compensation cylinder prevents slurry interruptions during the change-over the control valve. A combinatorial circuit controls the drive of each discharge cylinder and the slurry flows such that during the change over of the control valve the compensation cylinder pushes slurry into the discharge line and such that during a subsequent…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.