Patents by Inventor Kenneth E. Undercoffer

Kenneth E. Undercoffer 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).

  • MT CVD process
    Patent number: 6146697
    Abstract: The present invention comprises a method for coating at least one substrate with a carbonitride-containing coating by a MT CVD process which includes heating a substrate or substrates to a reaction temperature in a reaction chamber and then introducing into the reaction chamber a deposition process gas comprising from about 1 to about 30% of a hydrogen halide and predetermined amounts of a carbon/nitrogen source, a metal-halogen compound, H.sub.2, and optionally N.sub.2 so that a layer of the carbonitride-containing coating deposits on the surface of the substrates or substrates. The present invention also includes embodiments for coating at least one substrate with a carbonitride-containing coating by a MT CVD process which includes maintaining a temperature gradient in the reaction chamber during the introduction of the deposition process gas into the reaction chamber.
    Type: Grant
    Filed: March 2, 1999
    Date of Patent: November 14, 2000
    Assignee: Kennametal Inc.
    Inventor: Kenneth E. Undercoffer
  • Coated cutting tools
    Patent number: 5395680
    Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains.
    Type: Grant
    Filed: July 2, 1993
    Date of Patent: March 7, 1995
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal
  • CVD and PVD coated cutting tools
    Patent number: 5364209
    Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.
    Type: Grant
    Filed: January 14, 1994
    Date of Patent: November 15, 1994
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal
  • Method of machining using coated cutting tools
    Patent number: 5325747
    Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains. The cutting tool has been found to be particularly useful in the machining of titanium alloys and superalloys.
    Type: Grant
    Filed: August 13, 1992
    Date of Patent: July 5, 1994
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal, Roger A. Baillargeon, William D. Ewald
  • Binder enriched coated cutting tool
    Patent number: 5266388
    Abstract: Provided is a coated cutting tool having a binder enriched substrate. The coating includes at least one CVD layer which may be in a state of residual tensile stress and at least one layer in a state of residual compressive stress.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: November 30, 1993
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, George P. Grab, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal
  • Binder enriched CVD and PVD coated cutting tool
    Patent number: 5250367
    Abstract: Provided is a coated cutting tool having a binder enriched substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The PVD layer contains residual compressive stresses.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: October 5, 1993
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, George P. Grab, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal
  • Coated cutting tools
    Patent number: 5232318
    Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one CVD layer which may have a residual tensile stress and at least one layer having a high residual compressive stress. The outermost layer of the coating is preferably the one containing residual compressive stresses. The substrate is a composite having hard refractory grains.
    Type: Grant
    Filed: August 29, 1991
    Date of Patent: August 3, 1993
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal
  • CVD and PVD coated cutting tools
    Patent number: 5143488
    Abstract: Provided is a coated cutting tool having a coating and a substrate. The coating includes at least one chemical vapor deposited (CVD) layer and at least one physical vapor deposited (PVD) layer. The outermost layer of the coating is a PVD layer, containing residual compressive stresses. The substrate is a composite having hard refractory grains bonded together by a binder material.
    Type: Grant
    Filed: September 17, 1990
    Date of Patent: September 1, 1992
    Assignee: Kennametal Inc.
    Inventors: Anakkavur T. Santhanam, Rajendra V. Godse, Dennis T. Quinto, Kenneth E. Undercoffer, Prem C. Jindal