Discharge valve for concrete pumping apparatus
US4437646A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 2, 1981 |
| Grant date | Mar 20, 1984 |
| Priority date | — |
| Expiry date | Nov 2, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T74/20588
- WIPO fieldCivil engineering
- WIPO sectorOther fields
Abstract
A "dump" valve for a concrete pumping line includes a tubular valve body for in-line connection in a distribution line and an end hinged cover plate for opening the valve. The valve includes a short rectangular discharge pipe, including flat walls, secured in a rectangular side wall opening in the valve body. The pipe has an outer flat end. A valve cover plate somewhat larger than the rectangular discharge pipe is provided with a sealing, gasketed face. The cover plate is hinged at one axial end to the valve body and is pivotally mounted to move between a closed position engaging the flat end of the discharge pipe and a pivoted depending open position in which the plate is swung clear of the bottom end of the discharge pipe section. An operating handle having an over-the-center latch linkage is coupled to the cover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.