Patents by Inventor Abraham Chen

Abraham Chen 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: 5473965
    Abstract: An automatic screw feeding mechanism includes a feed belt receiving unit including a hollow housing which is provided with a limiting unit that is connected releasably to a stop unit of a hollow casing. A feed belt extends into the housing. A retaining unit is adapted to engage the feed belt to align a first screw with a tool bit of an automatic screw driving device which is connected releasably to and which extends into the casing. A guide plate is connected to the housing and has a front end that is spaced apart from the housing and that is adapted to engage an operating surface. An elongated guide unit is received in the casing and is connected releasably to the housing. An actuating unit includes a seat member which is received in the casing and which is movable forward and rearward relative to the guide unit.
    Type: Grant
    Filed: November 2, 1994
    Date of Patent: December 12, 1995
    Inventor: Abraham Chen
  • Patent number: 5138913
    Abstract: An automatic screw feeding mechanism includes a connector plate mounted on a rear open end of a hollow casing. The connector plate has a central opening to receive one end of an automtic screw driving device. A guide member has a front end extending out of a front open end of the casing, to be placed against an operating surface. The casing is slidably mounted on the guide member. An axial seat is provided in the guide member and defines an axial opening that is aligned with the central opening of the connector plate. The axial seat has a ratchet wheel rotatably provided on one side thereof. A feed belt extends into the guide member in front of the axial seat. The ratchet wheel engages the feed belt so as to align a first screw of the feed belt with the axial opening. A spring connects the axial seat and the connector plate.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: August 18, 1992
    Inventor: Abraham Chen