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. 12, 1994
Filed:
May. 27, 1992
Eugen O Bergmann, Butler County, PA (US);
Marvin A Brown, Allegheny County, PA (US);
Beverly Richard P, Butler County, PA (US);
The F.B. Leopold Co., Inc., Zelienople, PA (US);
Abstract
An improvement for a filter system which distributes backwash fluid uniformly throughout a bed of granular media is disclosed. The filter system includes a distributor positioned beneath and supporting the media, with the distributor having a plurality of walls which define a primary horizontal conduit and a secondary horizontal conduit. At least one of the walls which define the conduits contains metering orifices that connect the primary conduit to the secondary conduit. The improvement includes at least one baffle positioned within the primary conduit to facilitate uniform flow of backwash fluid from the primary conduit through the metering orifices into the secondary conduit. The baffle may comprise flanges extending from the walls which define the primary conduit normal to a fluid flow direction in the conduit. Alternatively, the baffle may include posts positioned within the conduit. The baffle generally reduces flow velocity near the wall which contains the metering orifices to enhance distribution of backwash fluids from the primary conduit to the secondary conduit. The baffle is preferably located near an inlet for the primary conduit, which is the high energy portion of the conduit. The invention also includes tubular inserts which may be placed in the metering orifices to assist backwash fluid flow in making the 90 degree turn from the primary conduit into the metering orifices.