Patent · US Expired

Piping valve with a housing for the transfer of a wiper insertable in conduits that supply pressurized viscous material, preferably concrete

US4373225A · kind A · utility

11Cited by

5References

11Claims

0Family size

Assignee

Friedrich Wilh. Schwing GmbH · DE

Inventors

Karl-Ernst v.Eckardstein · Kamen, DE
Werner Fiala · Wien, AT
Friedrich Schwing · Herne, DE

Key dates

Filing date	Jul 1, 1980
Grant date	Feb 15, 1983
Priority date	—
Expiry date	Jul 1, 2000

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB08B9/0552
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A piping valve for conduits conveying pressurized viscous material, such as concrete, provides a means for introducing a wiper into the conduit for cleaning purposes. The piping valve has a reciprocally displaceable part with a transmission pipe and a pipe chamber containing the wiper. The reciprocally displaceable part may be moved between a first position in which it is aligned with the conduit and a second position in which it receives the wiper for passage through the conduit.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.