Patents by Inventor Donald Alexander Larner

Donald Alexander Larner 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).

  • Bi-stable valve apparatus
    Patent number: 3977436
    Abstract: A bistable, electromagnetically-actuated valve has a closed chamber containing a moving armature with a valve orifice in each end of the closed chamber, one of which is formed by the end of a tube, a space around the tube forming the third fluid connection to the closed chamber. The armature has valve seats for closing the valve orifices.
    Type: Grant
    Filed: February 24, 1975
    Date of Patent: August 31, 1976
    Assignee: Fluid Devices Limited
    Inventor: Donald Alexander Larner
  • Multi-way directional fluid flow control valve arrangement
    Patent number: RE29481
    Abstract: In order to provide a multi-way directional fluid flow control valve arrangement which provides good control while being relatively cheap to manufacture, I use simple main valves all of which have parallel axes and all lie in a common plane, enabling me to form the main valves in a cheap manufacturing operation; the pilot valve however is more complex and has at least four connections, but because the pilot valve is smaller, this extra complexity does not make the whole valve arrangement more expensive.
    Type: Grant
    Filed: January 15, 1976
    Date of Patent: November 29, 1977
    Assignee: Fluid Devices, Ltd.
    Inventor: Donald Alexander Larner