Patents Assigned to Berkshire Precision Tool, LLC
-
Patent number: 7588396Abstract: An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of helical teeth is disposed within the fluted section. Each helical tooth has a cutting edge, a relief surface, a cutting surface, and an edge preparation surface. The edge preparation surface is contiguous with the cutting edge of the respective tooth.Type: GrantFiled: March 9, 2007Date of Patent: September 15, 2009Assignee: Berkshire Precision Tool, LLCInventor: Clifford Flynn
-
Patent number: 7544021Abstract: A rotary cutting tool with a longitudinal axis is provided that includes a shank portion, a cutting portion, and a plurality of chip-breaking features. The cutting portion, which extends out from the shank portion, includes a length, a plurality of blades and a plurality of flutes. The blades and flutes extend substantially all of the length of the cutting portion. Each blade includes a leading face side, a trailing face side, and a land surface that extends between the leading face side and the trailing face side. The plurality of chip-breaking features are disposed in the land surfaces of the blades, and non-uniformly distributed among the blades.Type: GrantFiled: November 1, 2005Date of Patent: June 9, 2009Assignee: Berkshire Precision Tool. LLCInventor: Clifford M. Flynn
-
Publication number: 20080219782Abstract: An end mill is provided having an axis of rotation, a shank section and a fluted section, each extending along the axis of rotation, and a plurality of helical teeth. The fluted section has a first end attached to the shank section and a second end. The plurality of helical teeth is disposed within the fluted section. Each helical tooth has a cutting edge, a relief surface, a cutting surface, and an edge preparation surface. The edge preparation surface is contiguous with the cutting edge of the respective tooth.Type: ApplicationFiled: March 9, 2007Publication date: September 11, 2008Applicant: Berkshire Precision Tool, LLCInventor: Clifford M. Flynn
-
Publication number: 20080206003Abstract: A rotary cutting tool is provided having an axis of rotation, a shank section, a fluted section, and a plurality of helical teeth. The shank section and the fluted section both extend along the axis of rotation. The fluted section has a first end integrally attached to the shank section, a second end, and an outer surface extending between the first and second ends. A plurality of helical teeth is disposed along the outer surface, each having a cutting edge and an undulating geometry. The helical teeth are arranged so that rotationally successive cutting edges are sufficiently dissimilar relative to one another to inhibit a detrimental periodic response in the rotary cutting tool.Type: ApplicationFiled: February 23, 2007Publication date: August 28, 2008Applicant: Berkshire Precision Tool, LLCInventor: Clifford M. Flynn
-
Patent number: 7223053Abstract: An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The cutting surface of each helical tooth includes a first section, a second section, and a take-off peak disposed between the first section and second section. The cutting edge of each helical tooth includes a first portion having a first constant angle, and a second portion having a second constant angle unequal to the first constant angle, and an arcuate transition section connecting the first portion and second portion. Some embodiments of the present invention include more portions than the aforesaid first and second portions.Type: GrantFiled: September 1, 2004Date of Patent: May 29, 2007Assignee: Berkshire Precision Tool, LLCInventor: Clifford M. Flynn
-
Publication number: 20070098506Abstract: A rotary cutting tool with a longitudinal axis is provided that includes a shank portion, a cutting portion, and a plurality of chip-breaking features. The cutting portion, which extends out from the shank portion, includes a length, a plurality of blades and a plurality of flutes. The blades and flutes extend substantially all of the length of the cutting portion. Each blade includes a leading face side, a trailing face side, and a land surface that extends between the leading face side and the trailing face side. The plurality of chip-breaking features are disposed in the land surfaces of the blades, and non-uniformly distributed among the blades.Type: ApplicationFiled: November 1, 2005Publication date: May 3, 2007Applicant: BERKSHIRE PRECISION TOOL, LLCInventor: Clifford Flynn
-
Publication number: 20060045637Abstract: An end mill is provided that includes a shank section and a fluted section. One or more helical teeth are disposed along an outer surface of the fluted section. Each helical tooth has a cutting surface and a relief wall that intersect to form an angle defining a helical cutting edge. The cutting surface of each helical tooth includes a first section, a second section, and a take-off peak disposed between the first section and second section. The cutting edge of each helical tooth includes a first portion having a first constant angle, and a second portion having a second constant angle unequal to the first constant angle, and an arcuate transition section connecting the first portion and second portion. Some embodiments of the present invention include more portions than the aforesaid first and second portions.Type: ApplicationFiled: September 1, 2004Publication date: March 2, 2006Applicant: Berkshire Precision Tool, LLCInventor: Clifford Flynn
-
Publication number: 20060045639Abstract: A one-piece toroidal end mill having an axis of rotation is provided. The end mill includes a shank section and a fluted section. The shank section extends along the axis of rotation. The fluted section extends along the axis of rotation, and has a first end, an outer surface, and a plurality of teeth. The first end is integrally attached to the shank section. Each of the plurality of teeth has a cutting surface and a shoulder surface. The cutting surface includes a cutting edge. The shoulder surfaces intersect with one another to form a center void disposed between the cutting surfaces.Type: ApplicationFiled: August 30, 2005Publication date: March 2, 2006Applicant: BERKSHIRE PRECISION TOOL, LLCInventors: Clifford Flynn, Louis Moser, Jyrki Liedes