The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 31, 2007
Filed:
Jun. 04, 2004
Rudiger Lennartz, Pulheim, DE;
Heinz Sindorf, Rommerskirchen, DE;
Willi Rott, Bornheim, DE;
Boll & Kirch Filterbau GmbH, Kerpen, DE;
Abstract
In the backflush filter () according to the invention, in which the flushing back of the filter inserts () which are received in several filter chambers takes place by means of flushing filtrate loaded by compressed air, the flush valve () and the mud drain valve () are actuated by a common drive, whereas the valves or the valve bores () are dimensioned in such a manner that the flush valve only releases the connection to the filtrate chamber (') of the filter inserts (′) to be flushed back, when the mud drain valve has already at least partially released the connection between the mud chamber (′) of the affected filter chamber (′) with a mud outlet (). By this, it is ensured in a particularly simple manner that at the backflush process the pressure level in the mud chamber has already dropped before the filtrate for the backflush is loaded with compressed air (see FIG.).