Patents by Inventor Ronald L. Sturm

Ronald L. Sturm 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).

  • Hand-held micropipettor with fluid transfer volume adjustment mechanism
    Patent number: 4096751
    Abstract: A micropipettor having an adjustable stop threadedly engaged with an internal reciprocal plunger assembly for defining the stroke length of the plunger and thus of a fluid displacing piston that is attached to the plunger assembly. The adjustable stop is manipulated by operable connection with a volume adjustment knob provided on the outside of the micropipettor body. The plunger carries a coarse volume indicating scale and the volume adjustment knob is provided with a fine volume setting scale. Accidental changes in volume adjustments are avoided by two types of automatic locks: a frictional engagement of the internal volume adjustment mechanism unless the plunger is deliberately placed in a certain position by the operator, and a detent lock of the volume adjustment knob unless the operator deliberately depresses it.
    Type: Grant
    Filed: June 15, 1977
    Date of Patent: June 27, 1978
    Assignee: Oxford Laboratories Inc.
    Inventors: Stanley J. Withers, Ronald L. Sturm
  • Pipette
    Patent number: D252823
    Type: Grant
    Filed: June 6, 1977
    Date of Patent: September 4, 1979
    Assignee: Oxford Laboratories, Inc.
    Inventors: Stanley J. Withers, Ronald L. Sturm