Patent · US Expired

Linear drive unit for cleaning filters

US4755199A · kind A · utility

0Cited by

4References

8Claims

0Family size

Inventors

Hans W. Esch · Bocholt, DE
Michael Hoenigs · Rödermark, DE

Key dates

Filing date	Aug 13, 1987
Grant date	Jul 5, 1988
Priority date	—
Expiry date	Aug 13, 2007

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D46/4272
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

A linear drive unit is proposed of a device (10) for cleaning of filtered fluids in particular, whereby the compressed air required for cleaning is emitted via a nozzle bar (21, 23). The nozzle bar (21, 23) extends from a cylinder (18) suppliable with compressed air and being movable along a piston rod passing (16) through the faces of the cylinder, said piston rod being enclosed by a partition wall (26) arranged stationary and dividing the cylinder interior into two chambers (28, 30). To supply the chambers (28, 30) with compressed air, the piston rod (16) is designed hollow in sections for the fluid to flow through, with each chamber being associated with a hollow section (32, 34) of the piston rod and having connections (42, 44) leading to it.

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