Patents by Inventor Daryl J. Hertema

Daryl J. Hertema 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).

  • Method of forming an automotive valve cover with integral positive crankcase ventilation
    Patent number: 6860010
    Abstract: A method of forming a valve cover suitable for attachment to an engine head is disclosed. The valve cover is molded from a plastic material to include at least one structure of a positive crankcase ventilation (PCV) system. Additionally, the design of the valve cover includes various advantages including, for example, structural integrity, ease of installation or the like.
    Type: Grant
    Filed: May 15, 2002
    Date of Patent: March 1, 2005
    Assignee: Dow Global Technologies, Inc.
    Inventors: Bart R. Jones, Daryl J. Hertema, Ravi Ramanathan, Sam L. Crabtree
  • Heater and thermostat arrangement for animal waterers
    Patent number: 4856459
    Abstract: An animal trough waterer and novel trough heater and thermostat arrangement are disclosed. The waterer includes a trough surrounded by an insulated housing. Attached to the bottom wall of the trough is a bracket which holds the heater in place against the trough. The bracket provides a slideway in which the thermostat is carried in any one of a range of positions. By adjusting the location of the thermostat to the heater, the water can be maintained at a relatively low but even temperature, and heater energy consumption can be reduced.
    Type: Grant
    Filed: August 3, 1987
    Date of Patent: August 15, 1989
    Assignee: Ritchie Industries, Inc.
    Inventors: Leland G. Wiseman, Daryl J. Hertema