Patents by Inventor Robert B. Angrakian

Robert B. Angrakian 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).

  • Four jaw radial chuck
    Patent number: 4718682
    Abstract: A chuck especially for a machine tool that operates in a universal manner as a two, three or four jaw chuck. The chuck (10) comprises four jaws (25) arranged in diametrically opposed pairs on the front face (12) of the chuck (10). The chuck (10) including drive pinions (36, 37) that drive a scroll (39, 239) that co-axially carries a differential gear train including a pair of differential gears (50, 51) one driving one pair of jaws (25) and the other driving the other pair whereby the differential gear train apportions the drive between the pair of jaws so that one pair may move independently of the other pair.
    Type: Grant
    Filed: October 31, 1984
    Date of Patent: January 12, 1988
    Inventors: Antun Zilic, Robert B. Angrakian