Patents by Inventor Alexander R. Greenhill
Alexander R. Greenhill 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).
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Publication number: 20230302550Abstract: A step drill bit includes a shank and a body that defines a plurality of axially stacked, progressively sized steps including a first step, a terminal step, and a plurality of intermediate steps having incrementally increasing diameters disposed between the first and terminal steps. The step drill bit includes a flute in the body extending from the distal end to the proximal end and a plurality of cutting edges formed in the body. Each cutting edge is disposed along one of the plurality of steps. Each cutting edge defines a helix angle and a radial rake angle. The helix angle of the cutting edge at a first intermediate step of the plurality of intermediate steps is greater than the helix angle at the first step. The radial rake angle of the cutting edge at the first intermediate step is greater than the radial rake angle at the first step.Type: ApplicationFiled: June 2, 2023Publication date: September 28, 2023Inventors: Brett A. Parendo, Richard Hohnl, JR., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson, Max R. Sawa, James E. Pangerc
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Patent number: 11691203Abstract: A step drill bit includes a shank and a body having 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, a terminal step at the proximal end, and a plurality of intermediate steps having incrementally increasing diameters disposed between the first and terminal steps. The step drill bit also includes a plurality of cutting edges each disposed along one of the plurality of steps. Each edge defines a helix angle and a radial rake angle. The radial rake angle and the helix angle of the cutting edge at the terminal step is greater than the radial rake angle and the helix angle of the cutting edge at the first step.Type: GrantFiled: June 23, 2021Date of Patent: July 4, 2023Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson, Max R. Sawa, James E. Pangerc
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Publication number: 20220339715Abstract: A method of manufacturing a drill bit includes providing a piece of bar stock having a first end, a second end opposite the first end, and an axis of rotation extending centrally through the bar stock between the first and second ends, cutting the first end of the bar stock to form a first tip angle at an oblique angle measured through the axis of rotation, cutting the first end of the bar stock at a second tip angle measured through the axis of rotation to form first tip surfaces and second tip surfaces. The first tip surfaces have the first tip angle and the second tip surfaces have the second tip angle. The second tip angle is smaller than the first tip angle. Finally forming a flute in the bar stock between the first and second ends and forming a shank at the second end of the bar stock.Type: ApplicationFiled: July 11, 2022Publication date: October 27, 2022Inventors: Brett A. Parendo, Alexander R. Greenhill, David Hlavac, Carter A. Gibson
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Patent number: 11407039Abstract: 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: GrantFiled: January 29, 2019Date of Patent: August 9, 2022Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Brett A. Parendo, Alexander R. Greenhill, David Hlavac, Carter A. Gibson
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Patent number: 11278970Abstract: 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: GrantFiled: October 7, 2019Date of Patent: March 22, 2022Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Alexander R. Greenhill, Brett A. Parendo, David Hlavac, WeiJie Wu, Gang Huang
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Patent number: 11273501Abstract: 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: GrantFiled: April 18, 2019Date of Patent: March 15, 2022Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson, Max R. Sawa, James E. Pangerc
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Publication number: 20210316375Abstract: A step drill bit includes a shank and a body having 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, a terminal step at the proximal end, and a plurality of intermediate steps having incrementally increasing diameters disposed between the first and terminal steps. The step drill bit also includes a plurality of cutting edges each disposed along one of the plurality of steps. Each edge defines a helix angle and a radial rake angle. The radial rake angle and the helix angle of the cutting edge at the terminal step is greater than the radial rake angle and the helix angle of the cutting edge at the first step.Type: ApplicationFiled: June 23, 2021Publication date: October 14, 2021Inventors: Brett A. Parendo, Richard Hohnl, JR., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson, Max R. Sawa, James E. Pangerc
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Publication number: 20210154749Abstract: A drill bit includes a body having a first end, a second end opposite the first end, and an axis of rotation extending centrally though the body from the first end to the second end. The body defining an outer diameter. The drill bit also includes a shank adjacent the second end of the body configured to couple to a tool and a cutting head adjacent the first end. The cutting head includes a plurality of axially stacked, progressively sized steps including a first step and a terminal step positioned between the first step and the first end of the body. The steps increase in diameter from the first step to the terminal step. The terminal step having a diameter that is less than or equal to the outer diameter.Type: ApplicationFiled: January 25, 2019Publication date: May 27, 2021Inventors: Brett A. Parendo, Alexander R. Greenhill, David Hlavac, Carter A. Gibson
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Patent number: 10670333Abstract: A self-contained water cooler module for use with a water dispenser includes a chassis. The chassis includes a back panel, a pair of spaced side panels extending forwardly from the back panel, a bottom panel extending forwardly from the back panel and attached to bottom edges of the pair of spaced side panels, and the back panel, side panels and bottom panel are constructed of a single, unitary sheet. A strut interconnects front edges of the pair of spaced side panels. A support bracket interconnects the back panel and the horizontal frame member. A refrigeration unit includes an evaporator, a condenser, a fan and motor assembly, and a compressor. The refrigeration unit is attached to the chassis. A water storage tank is configured to receive cooled water from the refrigeration unit. The chassis is configured to be attached to and detached from the water dispenser via a tool-free connection.Type: GrantFiled: April 20, 2018Date of Patent: June 2, 2020Assignee: Elkay Manufacturing CompanyInventors: Nicholas M. Nanos, Damon D. Shaw, Nikolay V. Popov, Jonathan Chee Yeen Chong, Kirk V. Streitmatter, Alexander R. Greenhill, Scott W. Matulik, Trevor D. Craig, John Conway, Matthew Chapman
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Publication number: 20200108451Abstract: 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: ApplicationFiled: October 7, 2019Publication date: April 9, 2020Inventors: Alexander R. GREENHILL, Brett A. PARENDO, David HLAVAC, WeiJie WU, Gang HUANG
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Publication number: 20190329331Abstract: 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: ApplicationFiled: April 18, 2019Publication date: October 31, 2019Inventors: Brett A. Parendo, Richard Hohnl, JR., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson
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Publication number: 20190232391Abstract: 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: ApplicationFiled: January 29, 2019Publication date: August 1, 2019Inventors: Brett A. Parendo, Alexander R. Greenhill, David Hlavac, Carter A. Gibson
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Publication number: 20180306492Abstract: A self-contained water cooler module for use with a water dispenser includes a chassis. The chassis includes a back panel, a pair of spaced side panels extending forwardly from the back panel, a bottom panel extending forwardly from the back panel and attached to bottom edges of the pair of spaced side panels, and the back panel, side panels and bottom panel are constructed of a single, unitary sheet. A strut interconnects front edges of the pair of spaced side panels. A support bracket interconnects the back panel and the horizontal frame member. A refrigeration unit includes an evaporator, a condenser, a fan and motor assembly, and a compressor. The refrigeration unit is attached to the chassis. A water storage tank is configured to receive cooled water from the refrigeration unit. The chassis is configured to be attached to and detached from the water dispenser via a tool-free connection.Type: ApplicationFiled: April 20, 2018Publication date: October 25, 2018Inventors: Nicholas M. Nanos, Damon D. Shaw, Nikolay V. Popov, Jonathan Chee Yeen Chong, Kirk V. Streitmatter, Alexander R. Greenhill, Scott W. Matulik, Trevor D. Craig, John Conway, Matthew Chapman
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Patent number: D872783Type: GrantFiled: April 27, 2018Date of Patent: January 14, 2020Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson
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Patent number: D881241Type: GrantFiled: December 3, 2019Date of Patent: April 14, 2020Assignee: Milwaukee Electric Tool CorporationInventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson
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Patent number: D892183Type: GrantFiled: March 4, 2020Date of Patent: August 4, 2020Assignee: MILWAUKEE ELECTRIC TOOL CORPORATIONInventors: Brett A. Parendo, Richard Hohnl, Jr., David Hlavac, Alexander R. Greenhill, Ingolfur Ludviksson