Patents by Inventor George C. Derbyshire

George C. Derbyshire 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).

  • Drill chuck
    Patent number: 4684139
    Abstract: A drill chuck having a cylindrical sleeve connected to its bevel gear element and a rearward part of the sleeve being rotatable on a cylindrical portion of the chuck body, the chuck body being formed with a number of localized swellings at the surface of the cylindrical portion to retain the sleeve in position, the swellings having been formed by plastic deformation of the metal of the body part.
    Type: Grant
    Filed: January 31, 1986
    Date of Patent: August 4, 1987
    Assignee: The Jacobs Manufacturing Company, Limited
    Inventor: George C. Derbyshire
  • Breast drills
    Patent number: 4240771
    Abstract: A breast drill including a casing of elongate hollow form containing gearing for transmitting drive to a drill chuck, and a grip handle connected to the casing and capable of angular adjustment around the casing so that it can be located at a required position in relation to the position of a crank handle which can be turned to transmit drive to the chuck.
    Type: Grant
    Filed: November 28, 1978
    Date of Patent: December 23, 1980
    Assignee: The Jabobs Manufacturing Company, Ltd.
    Inventor: George C. Derbyshire
  • Keys for drill chucks
    Patent number: 4186933
    Abstract: A key for a drill chuck, the key including a geared head part connected to a separately formed handle part of machined, forged, cast or moulded form.
    Type: Grant
    Filed: July 12, 1978
    Date of Patent: February 5, 1980
    Assignee: The Jacobs Manufacturing Co., Ltd.
    Inventor: George C. Derbyshire
  • Keys for manually operated work-holding chucks
    Patent number: 4157836
    Abstract: A key for a drill chuck, the key having resilient means whereby it is ejected automatically from the chuck, and a spindle formed for rotatable support of the resilient means.
    Type: Grant
    Filed: March 7, 1978
    Date of Patent: June 12, 1979
    Assignee: Chicago Pneumatic Tool Company
    Inventor: George C. Derbyshire
  • Drill chucks
    Patent number: 4154450
    Abstract: A chuck for drills and the like including at least three jaw elements of tapered form connected to a jaw carrier by means of flexible elements. Means are provided for urging the jaw elements axially relative to a nose cone so that they act against a frusto-conical bore portion of said nose cone and are urged radially inwards, accompanied by flexing of the flexible elements, to grip the shank of a drill or the like.
    Type: Grant
    Filed: April 14, 1978
    Date of Patent: May 15, 1979
    Assignee: The Jacobs Manufacturing Company, Limited
    Inventor: George C. Derbyshire
  • Drill chucks
    Patent number: 4073498
    Abstract: A drill chuck of the angularly sliding jaw type having an integral nut and bevel gear element formed as an unbroken ring and then split in halves, the halves being held together by a chuck sleeve; and the teeth of the bevel gear being "blind", that is, to say the teeth are connected at their radially inner ends by an integral strengthening collar. The collar forms one of two bearing faces to maintain axial alignment of the integral nut and bevel gear element in the chuck body element.
    Type: Grant
    Filed: March 8, 1976
    Date of Patent: February 14, 1978
    Assignee: The Jacobs Manufacturing Company, Limited
    Inventor: George C. Derbyshire
  • Drill chuck and method of assembly
    Patent number: 3934891
    Abstract: A drill chuck having a rotatable nut member for advancing and retracting converging jaws, and provided with passages for feeding lubricant to the groove in which the nut is rotatable. And a method of assembling the components of the chuck in dry condition and subsequently feeding lubricant through the passages to the groove in which the nut is rotatably mounted.
    Type: Grant
    Filed: April 9, 1974
    Date of Patent: January 27, 1976
    Assignee: The Jacobs Manufacturing Co., Ltd.
    Inventor: George C. Derbyshire
  • Drill chuck
    Patent number: D259855
    Type: Grant
    Filed: August 17, 1978
    Date of Patent: July 14, 1981
    Assignee: The Jacobs Manufacturing Co., Ltd.
    Inventor: George C. Derbyshire