Patents by Inventor Willem J. H. Bake

Willem J. H. Bake 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).

  • Container
    Patent number: 4390282
    Abstract: Containers for providing predetermined quantities of cement and aggregate to be transported to a site for on site mixing of concrete. The containers have two compartments which are self closing due to the weight of the contents, one compartment containing cement and the other aggregate. When placed on a ring-like support the compartments release their contents. The hopper of the concrete mixer provides support to permit the opening of the container mouths and has a water spray curtain to prevent the fine cement powder to be taken away by the wind, with the water spray providing the correct amount of water for the concrete.
    Type: Grant
    Filed: August 21, 1980
    Date of Patent: June 28, 1983
    Inventor: Willem J. H. Bake
  • Method of preparing and pouring concrete on a building site and a container and a vehicle for use with this method
    Patent number: 4189237
    Abstract: A method of mixing concrete and containers for providing predetermined quantities of cement and aggregate to be transported to a site for on site mixing of concrete. The containers have two compartments which are self closing due to the weight of the contents, one compartment containing cement and the other aggregate. When placed on a ring-like support the compartments move relatively to release their contents. The hopper of the concrete mixer has a ring-like support to open the containers and has a water spray curtain to prevent the fine cement powder to be taken away by the wind, with the water spray providing the correct amount of water for the concrete.
    Type: Grant
    Filed: January 15, 1979
    Date of Patent: February 19, 1980
    Inventor: Willem J. H. Bake