Patents by Inventor Marvin M. Heisner

Marvin M. Heisner 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).

  • Adjustable boring bar mechanism
    Patent number: 4278372
    Abstract: An adjustable multiple blade boring bar with diametrically disposed overlapping blade blocks, each adjustable in and out and a control cartridge having actuator pins movable in opposite directions in response to rotation of a differential screw, the pins being oriented in relation to slots on the blade block to move in a camming relationship to shift the blocks in and out. A differential screw associates the control cartridge and the boring bar to permit radial equalization of the blade block when installed initially or after sharpening.
    Type: Grant
    Filed: November 30, 1979
    Date of Patent: July 14, 1981
    Assignee: Fansteel Inc.
    Inventor: Marvin M. Heisner
  • Tool holding device
    Patent number: 4228705
    Abstract: A tool holding device for holding a cylindrical barrel in a cylindrical chamber which includes a two-part barrel with the parts axially oriented having facing chamfers to form a V-groove which receives a split ring. The retaining barrel has a rearwardly facing shoulder which form an annular abutment for the periphery of the ring when the ring is expanded by drawing the parts of the barrel axially toward each other.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: October 21, 1980
    Assignee: Fansteel Inc.
    Inventor: Marvin M. Heisner
  • Reinsertable adjustable boring bar
    Patent number: 4229128
    Abstract: An adjustable boring bar with a boring head which can be locked, released, readily adjusted radially, removed from the basic bar, replaced in the same position of adjustment and relocked. The boring bar has a self-contained locking device and adjustable index block which cooperate to permit quick disassembly and replacement.
    Type: Grant
    Filed: April 30, 1979
    Date of Patent: October 21, 1980
    Assignee: Fansteel Inc.
    Inventor: Marvin M. Heisner