Patents by Inventor Charles W. Depka

Charles W. Depka 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).

  • Cement block wall
    Patent number: 4091587
    Abstract: Method and means for constructing a cement block wall without mortar in which standard blocks can be used. Interengaging means, having rectangular flanges, engage cells of upper course blocks and cells of lower course blocks therebelow. Blocks can be abutted or separated by interposed members made of plastic or the like that extend to edges and have the appearance of mortar points, which are integrated with said interengaging means.
    Type: Grant
    Filed: February 14, 1977
    Date of Patent: May 30, 1978
    Inventor: Charles W. Depka
  • Means for slumping cement blocks
    Patent number: 3989432
    Abstract: During stripping of a cement block from a mold in a cement block forming machine by shoes of a stripper head, the head is driven by gravity and its distance from a pallet receiver structure, including a pallet receiving the cement block, is limited by hydraulic, collapsible stops. The stops collapse during stripping a distance sufficient to slump the block. The amount of collapse during the stripping time interval is controlled by adjustable hydraulic flow means under constant pressure.
    Type: Grant
    Filed: February 18, 1975
    Date of Patent: November 2, 1976
    Assignee: Modern Builders Supply Co.
    Inventor: Charles W. Depka
  • Means and method for defeathering blocks
    Patent number: 3965231
    Abstract: Blocks are defeathered by a multiplicity of simultaneous blows from below repeated on a line transversely of the path of travel in conveying dried blocks away from drying racks at a block making machine. The blows are delivered by a series of washers hung on a rod and struck upwardly by a squared, powered shaft rotating therebelow.
    Type: Grant
    Filed: April 7, 1975
    Date of Patent: June 22, 1976
    Assignee: Modern Builders Supply Co.
    Inventor: Charles W. Depka