Patents by Inventor Jean U. Thoma

Jean U. Thoma 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).

  • Axial piston rotary hydraulic machines
    Patent number: 4142450
    Abstract: A rotary hydraulic pump or motor of the axial piston type, including a rotary cylinder block (17) formed with cylinders containing pistons (15). The block is formed with ports (25) which co-operate with ports (26, 27) in a distributor plate or valve plate (19). The cylinder block is free to move in an axial direction, but is prevented from tilting. The valve plate (19) is fixed in an axial direction, but is allowed to tilt by means of a spherical abutment (36). Adjustable sleeves (28) accommodate the movement of the valve plate and convey the fluid to and from the cylinders (16) in the block.
    Type: Grant
    Filed: January 10, 1977
    Date of Patent: March 6, 1979
    Inventor: Jean U. Thoma