Patents by Inventor Kerstin Keiter

Kerstin Keiter 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: 5983939
    Abstract: A mixing valve has a valve housing formed with a seat, a flow-controlling valve cartridge fitted to the seat, and a cover engageable over the cartridge, pivotal on the cartridge about a first axis, and formed with an aperture. A handle engaging through the aperture with the cartridge is pivotal through an arc of less than 360.degree. about the first axis with the cover for controlling a characteristic of flow through the valve cartridge and is pivotal about a second axis generally perpendicular to the first axis for controlling another characteristic of flow through the valve cartridge. Interengaging formations on the cover and on the housing allow relative axial movement of the cover and the housing in an angular position of the cover relative to the housing outside the arc and prevent relative axial movement of the cover and the housing inside the arc.
    Type: Grant
    Filed: June 20, 1997
    Date of Patent: November 16, 1999
    Assignee: Friedrich Grohe AG
    Inventors: Bruno Heimann, Bernd Bischoff, Kerstin Keiter
  • Patent number: 5730176
    Abstract: A mixing valve has a housing, a valve cartridge fixed in the housing and having valve elements movable to vary rate and temperature of flow through the cartridge, and a handle connected to the valve elements and movable through a predetermined angular displacement about a temperature-adjustment axis to vary the temperature of flow through the cartridge and a flow-adjustment axis orthogonal to the temperature-adjustment axis to vary the rate of flow through the cartridge. A sleeve-like casing surrounding the cartridge is rotatable on the housing about one of the axes and is traversed by the handle. Interengaging formations on the casing and on the housing axially retain the casing on the housing except in a predetermined angular position of the casing on the housing relative to the one axis.
    Type: Grant
    Filed: March 20, 1996
    Date of Patent: March 24, 1998
    Assignee: Friedrich Grohe AG
    Inventors: Bruno Heimann, Bernd Bischoff, Kerstin Keiter