Patents by Inventor Allen S. Johnson, Jr.

Allen S. Johnson, Jr. has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 4401446
    Abstract: One or more hollow tubular air channeling members are positioned in the interior of an internal collection type filter bag to separate the incoming dirty air into a plurality of portions essentially confined from each other and to direct these separated and confined portions of dirty air to different interior portions of the bag and thereby increase the effective filtering efficiency of the bag and also increase useful bag life.
    Type: Grant
    Filed: October 28, 1981
    Date of Patent: August 30, 1983
    Assignee: Frances H. Johnson
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4324571
    Abstract: A bag-type filter apparatus, whose gas-permeable tubular filter bags are cleaned by a periodic reverse purge flow of air directed into one end of the filter bag, has a combination filter bag support and air diffuser for each filter bag and which is characterized in that the support holds the filter bag in an open tubular configuration throughout the length of the filter bag, but the air diffuser is of shorter length than the filter bag to more effectively clean the filter bag.
    Type: Grant
    Filed: March 25, 1981
    Date of Patent: April 13, 1982
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4297115
    Abstract: A bag-type filter apparatus, whose elongate tubular filter bags are supported by tubular cages therewithin, is provided with an air diffuser tube extending longitudinally within each tubular cage for diffusing and distributing a periodic reverse purge air flow throughout each filter bag to dislodge from the exterior surface of each filter bag particulate material which normally collects on the filter bags. Each air diffuser tube is formed from a perforate strip of helically wound sheet metal, adjacent edges of which are interconnected by a seam in which such adjacent edges overlap each other in interlocking relationship so that the seam extends helically around the respective air diffuser tube.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: October 27, 1981
    Assignee: Staclean Diffuser Company
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4289511
    Abstract: The invention is directed to the more effective cleaning of filter bags in a filter apparatus of the type having tubular venturis extending into the outlet ends of tubular supporting cages for the respective filter bags. Generally, such filter bags are cleaned by a periodic reverse flow of a jet of air into each venturi and thus through the filter bag. To enhance the cleaning of each filter bag, the present invention provides a hollow, perforated air diffuser tube communicatively connected to, supported by and extending from each venturi and longitudinally within the respective tubular cage and its surrounding filter bag so that, when a reverse flow of a jet of air is directed into the filter bag via the venturi, the diffuser tube diffuses and distributes the air throughout the filter bag so as to dislodge filtered particles along the length of the filter bag.
    Type: Grant
    Filed: July 23, 1980
    Date of Patent: September 15, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4289479
    Abstract: A wear-resistant, thermal protective, annular liner for a rotary kiln and an attendant method of making the same. The liner includes a series of elongate, axially aligned, annular composite liner sections, each of which comprises a layer of lightweight insulation material formed by side-by-side longitudinal rows of thermal insulating blocks positioned against the interior surface of the metal cylindrical wall of the kiln, with anchor brackets secured to the kiln wall and extending through respective openings in the insulating blocks and embedded in a relatively thicker and heavier layer of refractory material overlying the layer of insulation material, and wherein column portions of the refractory material project inwardly from the layer of refractory material and through the openings in the insulating blocks and in surrounding relation to the inner portions of the anchor brackets for supporting the layer of refractory material and preventing crushing the insulation material.
    Type: Grant
    Filed: June 19, 1980
    Date of Patent: September 15, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4280826
    Abstract: The cleaning of a tubular filter bag supported by a tubular supporting cage positioned within the filter bag is significantly enhanced by the provision of an elongate air distributor pipe extending into one end of the filter bag and longitudinally along the interior of the supporting cage and filter bag, with the air distributor pipe having a plurality of air outlet openings therein for distributing compressed air throughout the interior of the filter bag. An elongate hollow diffuser tube extends longitudinally within the supporting cage and filter bag in surrounding relation to the air distributor pipe, the diffuser tube having perforations therein for diffusing and further distributing throughout the filter bag the compressed air which is discharged from the air distributor pipe.
    Type: Grant
    Filed: October 3, 1979
    Date of Patent: July 28, 1981
    Assignee: Staclean Diffuser Company
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4259095
    Abstract: In order to achieve improved cleaning of a tubular filter bag when a reverse purge of air is directed into the filter bag, there is provided interiorly of the filter bag an elongate tube which is constructed in such a way as to serve for supporting and holding the filter bag in an open tubular configuration and for also diffusing and distributing air directed to the filter bag when a reverse purge of air is directed into the filter bag for cleaning of the filter bag. The elongate tube has peripheral portions extending outwardly beyond other portions of the tube for engaging and holding the surrounding filter bag, and the portions of the tube located inwardly therefrom have perforations located for diffusing and distributing the reverse purge of air directed into the filter bag.
    Type: Grant
    Filed: September 26, 1979
    Date of Patent: March 31, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4256045
    Abstract: The present invention provides a method and apparatus for continuously treating a flowing gas with a liquid to remove unwanted materials from the gas. Packing elements are directed downwardly along a predetermined zigzag path of travel, with the packing elements being maintained in the form of a relatively thin layer. A liquid is directed onto the layer of packing elements while a flowing gas is directed upwardly along a sinuous path of travel repeatedly passing back and forth through the downwardly moving layer of packing elements successively from opposite sides thereof. The packing elements are discharged from the lower end of the path of travel while clean packing elements are directed into the upper end to replace those which are discharged. The discharged packing elements are cleaned and recycled for reuse.
    Type: Grant
    Filed: January 16, 1980
    Date of Patent: March 17, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4256451
    Abstract: This invention relates to a kiln of a compact upright configuration which is constructed so as to successively preheat, heat, and then cool aggregate in a continuous operation while avoiding wasteful loss of heat from the walls of the kiln or in the effluent gases. In the apparatus of this invention there is provided an upright hollow housing having an air inlet opening in a lower portion thereof and an air outlet opening in an upper portion thereof. A fan is communicatively connected to the housing for causing outside air to enter the air inlet opening and flow upwardly through the housing. A fuel burner is provided in the housing for combusting a fuel and thereby heating the air flowing upwardly within the housing.
    Type: Grant
    Filed: February 15, 1980
    Date of Patent: March 17, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4255131
    Abstract: Relatively coarse aggregate is preheated to a relatively high temperature prior to introduction into a rotary kiln by directing the aggregate downwardly along a predetermined path of travel while maintaining the aggregate in the form of a relatively thin layer and while directing the waste heated gases from the kiln upwardly along a predetermined sinuous path of travel repeatedly passing laterally back and forth through the downwardly moving layer of aggregate from opposite sides thereof to thus provide highly effective contact of the gas with the aggregate, and while supplementally heating the waste heated gases so as to preheat the aggregate to a higher degree.
    Type: Grant
    Filed: November 19, 1979
    Date of Patent: March 10, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4255130
    Abstract: Relatively coarse aggregate is preheated continuously and in a highly effective manner by directing the aggregate downwardly along a predetermined path of travel while maintaining the aggregate in the form of a relatively thin layer and while directing a flowing heated gas upwardly along a predetermined sinuous path of travel repeatedly passing laterally back and forth through the downwardly moving layer of aggregate from opposite sides thereof to thus provide highly effective contact of the gas with the aggregate. The thin layer of aggregate is guided downwardly along a passageway formed by a pair of gas permeable retaining walls which extend generally vertically in opposing spaced relation to one another. The retaining walls are of a nonlinear zigzag configuration so arranged as to direct the thin layer of aggregate along a sinuous path of travel in the course of its downward movement along the elongate passageway.
    Type: Grant
    Filed: October 26, 1979
    Date of Patent: March 10, 1981
    Inventor: Allen S. Johnson, Jr.
  • Patent number: 4231770
    Abstract: The cleaning of a tubular filter bag when a periodic reverse purge of air is directed into the outlet end of the filter bag is significantly enhanced in accordance with the present invention by providing interiorly of the filter bag means for diffusing and distributing the reverse purge of air throughout the filter bag. More particularly, a hollow diffuser tube is provided extending longitudinally within the tubular supporting cage of the filter bag with one end of the diffuser tube communicating with the outlet end of the filter bag. The diffuser tube has perforations therein located for diffusing and distributing air throughout the filter bag when a periodic reverse purge of air is directed into the outlet end of the filter bag and into the diffuser tube.
    Type: Grant
    Filed: September 18, 1979
    Date of Patent: November 4, 1980
    Inventor: Allen S. Johnson, Jr.