Frank E Schiffman

US Patent:

7081232, Jul 25, 2006

Filed:

Mar 15, 2002

Appl. No.:

10/098949

Inventors:

Richard H. Ferguson - Cecil PA, US
Stanley R. Pickens - Monroeville PA, US
Frank E. Schiffman - Pittsburgh PA, US

Assignee:

PPG Industries, Ohio, Inc. - Cleveland OH

International Classification:

B01D 11/02

US Classification:

422261, 422278

Abstract:

An apparatus for dissolving and delivering a solution of a solid chemical material, such as calcium hypochlorite, is described. The apparatus includes in combination: a container, a lid removably mounted on the upper end of the container, and a housing. In operation, the lid is mounted on the container, which contains solid chemical material, and both are inverted and placed on top of the housing. A nozzle within the housing extends through a hole in the lid into the internal space of the container such that dissolving fluid is charged into the container through the nozzle where it contacts the solid chemical material. A solution of chemical material is formed within the container and the solution drains through additional holes formed in the lid and is removed from the housing to a point of use.

US Patent:

20150284274, Oct 8, 2015

Filed:

Mar 10, 2015

Appl. No.:

14/642790

Inventors:

- Atlanta GA, US
John Gary Miller - Waxhaw NC, US
Frank Schiffman - Pittsburgh PA, US

International Classification:

C02F 1/68

Abstract:

The present invention relates to a chemical feeder that includes a housing having a housing chamber, a sieve plate residing within the housing chamber, and a funnel residing on an upper surface of the sieve plate. The funnel includes upper and lower openings, an interior funnel space, and at least one funnel sidewall aperture. The sieve plate includes a plurality of sieve plate apertures at least a portion of which are in fluid communication with the interior funnel space via the lower funnel opening. During operation, a feed liquid passes up through at least a portion of the sieve plate apertures and into the interior funnel space where it contacts a solid chemical material, so as to form a treated liquid that includes dissolved chemical material, at least a portion of which passes out through the funnel sidewall aperture(s) and exits the chemical feed through an outlet.