Patents by Inventor Rudolf Elbrecht

Rudolf Elbrecht 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: 5243992
    Abstract: A pulse rate sensor system is packaged in a wristwatch sized assembly and is worn by the user to provide an accurate determination of pulse rate. A tonometer sensor is provided to detect heartbeat pressure waves produced by a superficial artery. A microcomputer manipulates the unprocessed tonometer sensor element signals using multiple algorithms to determine an accurate pulse rate.
    Type: Grant
    Filed: March 30, 1990
    Date of Patent: September 14, 1993
    Assignee: Colin Electronics Co., Ltd.
    Inventors: Joseph S. Eckerle, Dale W. Ploeger, Steven T. Holmes, Thomas P. Low, Rudolf Elbrecht, Philip R. Jeuck, III, Ronald E. Pelrine, Victor T. Newton, Jr.
  • Patent number: 5176143
    Abstract: A tonometric blood pressure monitoring system is disclosed having a variable extension sensor assembly. The sensor assembly is connected to a central control unit through separable pod elements. Within the pod elements are a master cylinder and drive system for varying the extension of blood pressure sensor from the sensor assembly. The blood pressure sensor is mounted at the end of an sensor piston, the movement of which is guided on a central rod. The sensor assembly also includes a rolling bellows arrangement for providing a variable hold-down pressure between a cavity block and the sensor assembly housing. The blood pressure sensor is moved laterally, in one embodiment, to provide optimum lateral placement of the sensor with respect to a target source of blood pressure information such as the radial artery of the subject.
    Type: Grant
    Filed: June 17, 1991
    Date of Patent: January 5, 1993
    Assignee: Colin Electronics Company, Ltd.
    Inventors: Joseph S. Eckerle, Roy D. Kornbluh, Rudolf Elbrecht, Eric A. Edwards
  • Patent number: 4416764
    Abstract: Method and apparatus for separating coarse sand particles from fine sand particles in a slurry of sand and a solution such as results from the solvent extraction of tar sand, such method comprising causing flow of such slurry in a generally horizontal direction and then causing upward flow at a rate such that coarse particles settle out and fine particles move upwardly to a slurry outlet. The apparatus preferably comprises a tubular duct for downward flow, bottom openings in the duct for outward flow, a lower receptacle for coarse particles and an annular space surrounding the duct for upward flow of slurry of solution and fine sand particles.
    Type: Grant
    Filed: November 28, 1980
    Date of Patent: November 22, 1983
    Assignee: Natomas Energy Company
    Inventors: Benjamin J. Gikis, Abner Y. Jones, Rudolf Elbrecht