Patents Assigned to Flanders Filters, Inc.
  • Patent number: 4030518
    Abstract: A sliding plate air flow control valve adapted for use in a high efficiency air filter system of the type used in clean rooms and the like. The sliding plate valve is preferably positioned on the downstream side of each filter, and includes a highly viscous, non-evaporating fluid positioned between the plates to thereby prevent the air from flowing laterally between the plates, whereby the volume of air flow may be accurately controlled over the full area of the clean room as well as the full area of each filter.
    Type: Grant
    Filed: July 30, 1976
    Date of Patent: June 21, 1977
    Assignee: Flanders Filters, Inc.
    Inventor: David E. Wilcox
  • Patent number: 3986850
    Abstract: A high efficiency air filter system of the type used in clean rooms and the like, and having a sliding plate valve associated with each filter. The sliding plate valve is positioned on the downstream side of each filter, and includes a highly viscous, non-evaporating fluid positioned between the plates to thereby prevent the air from flowing laterally between the plates, whereby the volume of air flow may be accurately controlled over the full area of the clean room as well as the full area of each filter.
    Type: Grant
    Filed: December 5, 1974
    Date of Patent: October 19, 1976
    Assignee: Flanders Filters, Inc.
    Inventor: David E. Wilcox
  • Patent number: 3935803
    Abstract: A portable apparatus for directing a filtered stream of air downwardly over a predetermined area such as a hospital bed or the like. The apparatus includes a cantilevered plenum chamber adapted to be positioned horizontally over the bed, the plenum chamber comprising two segments hingedly interconnected so that the forward segment thereof may be dropped downwardly to facilitate movement and storage. The bottom wall of the plenum chamber comprises an openwork screen bounded by a peripheral slot, and a layer of filtering media overlies the screen such that a first portion of the air entering the plenum chamber is directed downwardly through the filtering media and screen at a relatively low velocity and in a substantially laminar flow pattern, and a second portion of the air is directed through the open slot to define a peripheral air curtain of relatively high velocity. The air curtain thereby serves to prevent the incursion of unfiltered air from the surrounding environment.
    Type: Grant
    Filed: October 12, 1972
    Date of Patent: February 3, 1976
    Assignee: Flanders Filters, Inc.
    Inventor: Louis Bush