Patents by Inventor Petrus Leo Clemens Wijnant

Petrus Leo Clemens Wijnant 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).

  • Process for making a gastight passage
    Patent number: 4091520
    Abstract: A gastight seal for a rotating spindle or the like is made by tightly fitting an externally spirally ribbed element into a bore in another element and machining out that part of the element which projects inside the spiral rib so as to leave only the spiral rib flexed within the bore.
    Type: Grant
    Filed: December 2, 1975
    Date of Patent: May 30, 1978
    Assignee: Stichting Reactor Centrum Nederland
    Inventors: Petrus Leo Clemens Wijnant, Hendrik Jan Ijlstra
  • Gastight passage seal
    Patent number: 3942803
    Abstract: A gastight seal for fast rotating axes, spindles or other rotors having the form of a body of revolution, of the molecular type, in which helical grooves in the stationary seal part are surrounding the rotor without making contact. Special measures are taken to facilitate the casting of the stationary seal part.
    Type: Grant
    Filed: June 9, 1972
    Date of Patent: March 9, 1976
    Assignee: Reactor Centrum Nederland
    Inventors: Petrus Leo Clemens Wijnant, Hendrik Jan Ijlstra