Patents by Inventor Edward T. Heck

Edward T. Heck 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: 5293900
    Abstract: A direct drive joystick has a contactless system for sensing the position of the joystick lever and having valve drivers which are positioned within the joystick, and which are directly connected to coils of a proportional valve. The joystick thus is not prone to failure due to internal friction of its sensing elements and at the same time is capable of directly driving valves without the provision of any other devices between the joystick and the valves. The joystick including the valve driver is rugged, compact and can be easily installed. The valve driver can be adjusted by an operator who is simultaneously actuating the joystick. The operational status of one or more of the joystick, the valve being controlled by the joystick, and the power source for the valve and joystick are visually displayed at a location which can be easily viewed by the joystick operator. Operation of the valve driver and thus of the joystick is prevented upon failure of a signal wire or upon generation of a joystick fault signal.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: March 15, 1994
    Assignee: Hydro Electronic Devices Inc. (HED)
    Inventors: Hassan Karbassi, Edward T. Heck