Patents by Inventor Franz Hani

Franz Hani 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: 5215443
    Abstract: A high pressure liquid pump has a drivable swash plate and a plunger which is acted on by the swash plate and guided in a cylinder bore of the pump housing. In the region of the front end of the plunger facing the swash plate a valve arrangement is provided between a low pressure chamber and a pump chamber. A second valve arrangement is arranged between the pump chamber and a high pressure chamber. The plunger has a transverse bore which stands in communication with the low pressure chamber during the pump movement and also has an axial bore extending from the transverse bore to the front end of the plunger, with the axial bore being enlarged towards the front end while forming a ring-like valve seat, with a valve insert being arranged in the broadened section of the axial bore.
    Type: Grant
    Filed: September 27, 1991
    Date of Patent: June 1, 1993
    Assignee: Speck-Kolbenpumpenfabrik Otto Speck GmbH & Co. KG
    Inventors: Franz Hani, Hermann Breitsamer
  • Patent number: 4722359
    Abstract: A relief valve for high pressure pumps is described which is characterized by its extremely compact construction and complete reliability against leakage. The relief valve has a valve ball in the bypass path which is pressed by a high and preferably adjustable force against the valve seat, by means of a compression spring which is located entirely in the housing of the unloader. The spigot which acts against the ball in the bypass path is actuated by means of a piston which is acted on by the output pressure over its entire cross-sectional area.
    Type: Grant
    Filed: April 8, 1986
    Date of Patent: February 2, 1988
    Assignee: Speck-Kolbenpumpen-Fabrik Otto Speck KG
    Inventor: Franz Hani
  • Patent number: 4583921
    Abstract: A pump which operates with several plungers is described with the plunger preferably being actuated via an eccentric drive unit and, having regard to the particular volume of flow per unit time, using several small plungers rather than a lesser number of comparatively large plungers, and accordingly operating with a large number of small volume displacements at a comparatively high speed of rotation. In this arrangement the suction chamber is centrally arranged in the pump body and the high pressure outlets of the pump chambers, which open into a common pressure chamber of ring-like construction, extend at least substantially in a radial direction.
    Type: Grant
    Filed: December 28, 1984
    Date of Patent: April 22, 1986
    Assignee: Speck-Kolbenpumpen-Fabrik Otto Speck KG
    Inventors: Horst Wolff, Franz Hani
  • Patent number: 4561828
    Abstract: A pump for forwarding liquids is described which has at least one pump chamber with inlet and outlet valves and also a plunger which periodically varies the volume of the pump chamber. To avoid the problems of dry running with very rapidly running pumps, and in order to overcome the resulting danger of destruction, the pump is arranged so that the closing force of at least one inlet valve of each pump chamber is controlled in dependence on the movement of the displacement member.
    Type: Grant
    Filed: May 18, 1983
    Date of Patent: December 31, 1985
    Assignee: Speck-Kolbenpumpen-Fabrik Otto Speck KG
    Inventors: Horst Wolff, Franz Hani