Patents by Inventor David Hlavac

David Hlavac 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).

  • Publication number: 20200108451
    Abstract: A drill bit includes a body having a first end, a second end, and an axis of rotation extending centrally through the body from the first end to the second end. The drill bit also includes a shank adjacent the second end. The drill bit further includes a cutting head adjacent the first end. The cutting head includes a pilot tip and a cutting portion. The cutting portion has first tip surfaces and second tip surfaces on opposite sides of the pilot tip. Each first tip surface extends radially outward from the pilot tip to a corresponding second tip surface. The first tip surfaces define a first tip angle through the axis of rotation that is less than 180 degrees. The second tip surfaces define a second tip angle through the axis of rotation that is smaller than the first tip angle.
    Type: Application
    Filed: October 7, 2019
    Publication date: April 9, 2020
    Inventors: Alexander R. GREENHILL, Brett A. PARENDO, David HLAVAC, WeiJie WU, Gang HUANG
  • Publication number: 20190329331
    Abstract: A drill bit includes a shank extending along a bit axis and a body with a proximal end adjacent the shank and a distal end opposite the proximal end. The body defines a plurality of axially stacked, progressively sized steps including a first step at the distal end and a terminal step at the proximal end. The drill bit also includes a flute in the body. The flute defines an elongated groove that extends from the distal end to the proximal end. The drill bit further includes a plurality of cutting edges formed in the body. Each cutting edge is disposed along one of the plurality of steps and defines a helix angle and a rake angle. The helix angle of the cutting edge at the terminal step is greater than the helix angle of the cutting edge at the first step. A ratio of the helix angle to the rake angle of the cutting edge at the first step is in a range from 0.5 to 2.4, and a ratio of the helix angle to the rake angle of the cutting edge at the terminal step is in a range of 0.9 to 1.7.
    Type: Application
    Filed: April 18, 2019
    Publication date: October 31, 2019
    Inventors: Brett A. Parendo, Richard Hohnl, JR., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson
  • Publication number: 20190232391
    Abstract: A drill bit includes a body having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the body. The drill bit includes a cutting head with a cutting tip on the axis of rotation and a cutting portion. The cutting portion includes first tip surfaces on opposite sides of the axis of rotation and second tip surfaces on opposite sides of the axis of rotation. Each first tip surface extends radially outward from the cutting tip to a corresponding second tip surface. Each second tip surface extends from a corresponding first tip surface to an outer periphery of the body. The first tip surfaces define a first tip angle measured through the axis of rotation that is oblique. The second tip surfaces define a second tip angle measured through the axis of rotation that is smaller than the first tip angle.
    Type: Application
    Filed: January 29, 2019
    Publication date: August 1, 2019
    Inventors: Brett A. Parendo, Alexander R. Greenhill, David Hlavac, Carter A. Gibson
  • Patent number: 8061251
    Abstract: A power tool includes a base, a table supported by the base for pivoting movement about an axis, a coarse adjustment assembly between the base and the table, and a fine adjustment assembly between the base and the table. The fine adjustment assembly includes a rotating member supported by one of the base and the table, and an engagement surface provided by the other of the base and the table. The rotating member is selectively engageable with and rotatable along the engagement surface to finely adjust the angular position of the table relative to the base. The angular position of the table relative to the base is coarsely adjustable using the coarse adjustment assembly when the rotating member is disengaged from the engagement surface. The fine adjustment assembly disengages the coarse adjustment assembly and maintains the coarse adjustment assembly disengaged when the rotating member is engaged with the engagement surface.
    Type: Grant
    Filed: March 6, 2009
    Date of Patent: November 22, 2011
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D. Willer, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Michael E. Weber, Eric X. Fernandes, David Hlavac, Michael L. Welliver, Daniel H. Schneider
  • Patent number: 7802505
    Abstract: A power tool includes a housing assembly having a housing portion and an arm extending upwardly from the housing portion. The arm has an outer surface. The power tool also includes a drive unit supported by the arm. The drive unit is operable to drive a tool element to work on a work piece. The power tool further includes a collection assembly operable to collect debris generated by the tool element working on the work piece. The collection assembly includes a collection chute assembly having an inlet and an outlet. The collection chute assembly is positionable on the arm to define, between the inlet and the outlet, a first path for debris around one side of the outer surface of the arm and a second path for debris around the other side of the outer surface of the arm.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: September 28, 2010
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D Willer, Dennis J. Cerney, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Edward T. Gisske, Edward A. Raleigh, Michael E. Weber, Eric Fernandes, David Hlavac, Troy C. Thorson, Michael L. Welliver
  • Patent number: 7798041
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: September 21, 2010
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D. Willer, Dennis J. Cerney, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Edward T. Gisske, Edward A. Raleigh, Michael E. Weber, Eric Fernandes, David Hlavac, Troy C. Thorson, Michael L. Welliver
  • Patent number: 7574950
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: August 18, 2009
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D. Willer, Dennis J. Cerney, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Edward T. Gisske, Edward A. Raleigh, Michael E. Weber, Eric Fernandes, David Hlavac, Troy C. Thorson, Michael L. Welliver
  • Publication number: 20090199689
    Abstract: A power tool includes a base, a table supported by the base for pivoting movement about an axis, a coarse adjustment assembly between the base and the table, and a fine adjustment assembly between the base and the table. The fine adjustment assembly includes a rotating member supported by one of the base and the table, and an engagement surface provided by the other of the base and the table. The rotating member is selectively engageable with and rotatable along the engagement surface to finely adjust the angular position of the table relative to the base. The angular position of the table relative to the base is coarsely adjustable using the coarse adjustment assembly when the rotating member is disengaged from the engagement surface. The fine adjustment assembly disengages the coarse adjustment assembly and maintains the coarse adjustment assembly disengaged when the rotating member is engaged with the engagement surface.
    Type: Application
    Filed: March 6, 2009
    Publication date: August 13, 2009
    Inventors: Jason D. Hetcher, Mark D. Willer, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Michael E. Weber, Eric X. Fernandes, David Hlavac, Michael L. Welliver, Daniel H. Schneider
  • Publication number: 20060266184
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: August 3, 2006
    Publication date: November 30, 2006
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20060162523
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: December 16, 2005
    Publication date: July 27, 2006
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20050262978
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: April 15, 2005
    Publication date: December 1, 2005
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20050262983
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: April 15, 2005
    Publication date: December 1, 2005
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20050262984
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: April 15, 2005
    Publication date: December 1, 2005
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20050247177
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: April 15, 2005
    Publication date: November 10, 2005
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Publication number: 20050247178
    Abstract: A saw, such as a chop saw, a miter saw, a sliding saw, a compound miter saw, etc. In some constructions, the saw may include a miter adjustment assembly including a coarse adjustment assembly and a fine adjustment assembly. In some constructions, the saw may include a bevel adjustment assembly including a brake mechanism and a bevel detent assembly. In some constructions, the saw may include a dust collection assembly including a dust chute defining a dust both around the bevel arm. In some constructions, the saw may include a table having a top wall with a peripheral rim and a side wall depending from the top wall, and a base defining an opening in which the side wall is received and a ledge above which the rim is positioned. In some constructions, the saw may include elastomeric material covering a portion of the base, such as a bottom surface, a lateral surface, a grip surface, etc.
    Type: Application
    Filed: April 15, 2005
    Publication date: November 10, 2005
    Inventors: Jason Hetcher, Mark Willer, Dennis Cerney, William Elger, Harold Papenfuss, Daryl Richards, David Bauer, Edward Gisske, Edward Raleigh, Michael Weber, Eric Fernandes, David Hlavac, Troy Thorson, Michael Welliver
  • Patent number: D556224
    Type: Grant
    Filed: April 15, 2005
    Date of Patent: November 27, 2007
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D. Willer, Dennis J. Cerney, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Edward T. Gisske, Edward A. Raleigh, Michael E. Weber, Eric Fernandes, David Hlavac, Troy C. Thorson, Michael L. Welliver
  • Patent number: D602964
    Type: Grant
    Filed: October 14, 2005
    Date of Patent: October 27, 2009
    Assignee: Milwaukee Electric Tool Corporation
    Inventors: Jason D. Hetcher, Mark D. Willer, Dennis J. Cerney, William A. Elger, Harold L. Papenfuss, Daryl S. Richards, David R. Bauer, Edward T. Gisske, Edward R. Raleigh, Michael E. Weber, Eric Fernandes, David Hlavac, Troy C. Thorson, Michael L. Welliver
  • Patent number: D872783
    Type: Grant
    Filed: April 27, 2018
    Date of Patent: January 14, 2020
    Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
    Inventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson