Patents by Inventor Lars-Gunnar Wallstrom
Lars-Gunnar Wallstrom 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).
-
Patent number: 7819610Abstract: A tool intended for chip removing machining is disclosed. The tool is of the type that has a basic body and an indexable cutting insert that can be connected to the basic body via an interface including a primary connecting surface in the basic body and a secondary connecting surface in the cutting insert. Among two cooperating support flanks included in the connecting surface of the basic body, one is situated on a level above the other in order to form a lateral support for the cutting insert. In the connecting surface of the cutting insert, contact flanks are included that, together with the clearance surface of the cutting insert, form a V-shapedly converging wedge part that can be applied in a seat delimited by the support flanks, the contact flank being urged against the low-positioned support flank of the basic body, while an upper part of the clearance surface of the cutting insert is urged against the high-positioned support flank.Type: GrantFiled: January 24, 2008Date of Patent: October 26, 2010Assignee: Sandvik Intellectual Property ABInventors: Lars-Gunnar Wallström, Åke Johansson, Ove Lund
-
Patent number: 7794182Abstract: An indexable milling insert includes opposite top and bottom sides between which a peripheral clearance surface extends, and two opposite cutting edges formed in the transition between the top side and the clearance surface. Each of the cutting edges includes a substantially straight portion connected with a straight section of the clearance surface, and further includes a curved portion connected with a convexly arched section of the clearance surface. A coupling including one or more male- and/or female-like engagement members is located along said clearance surface. Furthermore, the milling insert may be used with a shim plate for attachment to a milling tool.Type: GrantFiled: January 17, 2008Date of Patent: September 14, 2010Assignee: Sandvik Intellectual Property ABInventors: Ralf Lehto, Lars-Gunnar Wallström, Göran Pantzar, Per Blomstedt
-
Patent number: 7419336Abstract: An indexable milling insert includes opposite top and bottom sides between which a peripheral clearance surface extends, and two opposite cutting edges formed in the transition between the top side and the clearance surface. Each of the cutting edges includes a substantially straight portion connected with a straight section of the clearance surface, and further includes a curved portion connected with a convexly arched section of the clearance surface. A coupling including one or more male- and/or female-like engagement members is located along said clearance surface. Furthermore, the milling insert may be used with a shim plate for attachment to a milling tool.Type: GrantFiled: May 24, 2006Date of Patent: September 2, 2008Assignee: Sandvik Intellectual Property ABInventors: Ralf Lehto, Lars-Gunnar Wallström, Göran Pantzar, Per Blomstedt
-
Publication number: 20080181731Abstract: A tool intended for chip removing machining is disclosed. The tool is of the type that has a basic body and an indexable cutting insert that can be connected to the basic body via an interface including a primary connecting surface in the basic body and a secondary connecting surface in the cutting insert. Among two cooperating support flanks included in the connecting surface of the basic body, one is situated on a level above the other in order to form a lateral support for the cutting insert. In the connecting surface of the cutting insert, contact flanks are included that, together with the clearance surface of the cutting insert, form a V-shapedly converging wedge part that can be applied in a seat delimited by the support flanks, the contact flank being urged against the low-positioned support flank of the basic body, while an upper part of the clearance surface of the cutting insert is urged against the high-positioned support flank.Type: ApplicationFiled: January 24, 2008Publication date: July 31, 2008Inventors: Lars-Gunnar Wallstrom, Ake Johansson, Ove Lund
-
Publication number: 20080118314Abstract: An indexable milling insert includes opposite top and bottom sides between which a peripheral clearance surface extends, and two opposite cutting edges formed in the transition between the top side and the clearance surface. Each of the cutting edges includes a substantially straight portion connected with a straight section of the clearance surface, and further includes a curved portion connected with a convexly arched section of the clearance surface. A coupling including one or more male- and/or female-like engagement members is located along said clearance surface. Furthermore, the milling insert may be used with a shim plate for attachment to a milling tool.Type: ApplicationFiled: January 17, 2008Publication date: May 22, 2008Inventors: Ralf Lehto, Lars-Gunnar Wallstrom, Goran Pantzar, Per Blomstedt
-
Patent number: 7255518Abstract: A tool body includes an insert seat for receiving a cutting insert for chip-removing machining. The insert seat includes a bottom surface and support surfaces upstanding from the bottom surface. Each support surface comprises at least three ridges separated by grooves. Each groove has a depth greater than zero and no greater than 0.015 mm. An insert mounted in the seat by a screw has a center hole whose axis is offset from the axis of a threaded hole of the body in which the screw is connected. That offset distance creates a prestress of the insert toward the ridges. The depth of the grooves (i.e., the height of the ridges) is substantially less than the distance of the offset.Type: GrantFiled: August 26, 2005Date of Patent: August 14, 2007Assignee: Sandvik Intellectual Property ABInventors: Lars-Gunnar Wallström, Lennart Wihlborg
-
Publication number: 20060275088Abstract: An indexable milling insert includes opposite top and bottom sides between which a peripheral clearance surface extends, and two opposite cutting edges formed in the transition between the top side and the clearance surface. Each of the cutting edges includes a substantially straight portion connected with a straight section of the clearance surface, and further includes a curved portion connected with a convexly arched section of the clearance surface. A coupling including one or more male- and/or female-like engagement members is located along said clearance surface. Furthermore, the milling insert may be used with a shim plate for attachment to a milling tool.Type: ApplicationFiled: May 24, 2006Publication date: December 7, 2006Inventors: Ralf Lehto, Lars-Gunnar Wallstrom, Goran Pantzar, Per Blomstedt
-
Publication number: 20060088390Abstract: A tool body includes an insert seat for receiving a cutting insert for chip-removing machining. The insert seat includes a bottom surface and support surfaces upstanding from the bottom surface. Each support surface comprises at least three ridges separated by grooves. Each groove has a depth greater than zero and no greater than 0.015 mm. An insert mounted in the seat by a screw has a center hole whose axis is offset from the axis of a threaded hole of the body in which the screw is connected. That offset distance creates a prestress of the insert toward the ridges. The depth of the grooves (i.e., the height of the ridges) is substantially less than the distance of the offset.Type: ApplicationFiled: August 26, 2005Publication date: April 27, 2006Applicant: SANDVIK INTELLECTUAL PROPERTY ABInventors: Lars-Gunnar Wallstrom, Lennart Wihlborg
-
Patent number: 6945740Abstract: A rotatable cutting tool for chip-removing machining includes a basic body which defines a center axis of rotation. Cutting inserts are detachably mounted in respective cutting seats that are formed in the basic body. Each insert has a square shape and includes first and second pairs of mutually parallel major cutting edges, four corners, and four wiper edges. Each wiper edge is situated between a major cutting edge and a respective corner. The wiper edges are shorter than the major cutting edges and are inclined relative thereto, wherein an imaginary extension line of the wiper edge forms a first acute angle with the respective major cutting edge as the insert is viewed in a direction perpendicular to the top surface. The cutting seats are arranged to orient the inserts wherein an axially forwardmost wiper edge of each insert lies in a plane oriented perpendicular to the axis, and wherein a radially outermost wiper edge of each insert is oriented parallel to the axis.Type: GrantFiled: March 12, 2004Date of Patent: September 20, 2005Assignee: Sandvik Intellectual Property ABInventors: Inge Svenningsson, Ralf Lehto, Lars-Gunnar Wallström
-
Publication number: 20050111925Abstract: A rotatable cutting tool for chip-removing machining includes a basic body which defines a center axis of rotation. Cutting inserts are detachably mounted in respective cutting seats that are formed in the basic body. Each insert has a square shape and includes first and second pairs of mutually parallel major cutting edges, four corners, and four wiper edges. Each wiper edge is situated between a major cutting edge and a respective corner. The wiper edges are shorter than the major cutting edges and are inclined relative thereto, wherein an imaginary extension line of the wiper edge forms a first acute angle with the respective major cutting edge as the insert is viewed in a direction perpendicular to the top surface. The cutting seats are arranged to orient the inserts wherein an axially forwardmost wiper edge of each insert lies in a plane oriented perpendicular to the axis, and wherein a radially outermost wiper edge of each insert is oriented parallel to the axis.Type: ApplicationFiled: March 12, 2004Publication date: May 26, 2005Applicant: SANDVIK ABInventors: Inge Svenningsson, Ralf Lehto, Lars-Gunnar Wallstrom
-
Publication number: 20030210963Abstract: A rotary tool for chip removing machining, for example a milling cutter or a drill, includes a shaft, a holder, and a cutting part. The shaft has a conical seating arranged in its front end. The holder has a slightly conical recess, whose cross-sectional dimension decreases toward the open end of the recess. The cutting part has a slightly conical pin designed to be received in the recess and has a cross-sectional dimension which increases in the direction of the free end of the pin. The recess is formed by a wall which is elastically flexible in a radial direction. When the holder is drawn axially into the seating, the wall is flexed radially inwardly, causing the conical surface of the recess to tightly grip the conical surface of the pin and create an interference fit of the pin in the recess.Type: ApplicationFiled: March 21, 2003Publication date: November 13, 2003Applicant: SANDVIK ABInventors: Isak Kakai, Lars-Gunnar Wallstrom
-
Patent number: 6503028Abstract: A cutting insert includes a body formed of sintered powder, with a center hole extending through the body for receiving a fastening screw. The center hole includes a cylindrical portion. The body includes two side surfaces extending downwardly from respective main cutting edges of the insert. A recess is formed in each side surface and extends to the bottom of the body. Each recess has a length longer than the diameter of the center hole. Preferably, the length of the recess is 120% of the diameter of the center hole.Type: GrantFiled: June 15, 2001Date of Patent: January 7, 2003Assignee: Sandvik AktiebolagInventor: Lars-Gunnar Wallström
-
Publication number: 20020192041Abstract: A cutting insert includes a body formed of sintered powder, with a center hole extending through the body for receiving a fastening screw. The center hole includes a cylindrical portion. The body includes two side surfaces extending downwardly from respective main cutting edges of the insert. A recess is formed in each side surface and extends to the bottom of the body. Each recess has a length longer than the diameter of the center hole. Preferably, the length of the recess is 120% of the diameter of the center hole.Type: ApplicationFiled: June 15, 2001Publication date: December 19, 2002Inventor: Lars-Gunnar Wallstrom
-
Patent number: 5466097Abstract: A cutting insert for chip forming machining tools is formed with a chip surface whose chip or rake angle increases with increasing cutting depth. In this manner the cutting edge becomes stronger closer to the operative cutting insert comer, where the work load is the largest. Simultaneously, the rake angle increases and the cutting forces diminish towards increasing cutting depth, where the specific work load is smaller.Type: GrantFiled: January 24, 1994Date of Patent: November 14, 1995Assignee: Sandvik ABInventor: Lars-Gunnar Wallstrom
-
Patent number: D348891Type: GrantFiled: July 17, 1992Date of Patent: July 19, 1994Assignee: Sandvik ABInventors: Lars Markusson, Hans Lindberg, Lars-Gunnar Wallstrom
-
Patent number: D351606Type: GrantFiled: July 16, 1992Date of Patent: October 18, 1994Assignee: Sandvik ABInventors: Lars Markusson, Hans Lindberg, Lars-Gunnar Wallstrom
-
Patent number: D363076Type: GrantFiled: July 26, 1993Date of Patent: October 10, 1995Assignee: Sandvik ABInventors: Lars-Ola Hansson, Lars-Gunnar Wallstrom, Goran Pantzer
-
Patent number: D364178Type: GrantFiled: July 26, 1993Date of Patent: November 14, 1995Assignee: Sandvik ABInventors: Lars-Ola Hansson, Lars-Gunnar Wallstrom, Goran Pantzar
-
Patent number: D367866Type: GrantFiled: March 16, 1995Date of Patent: March 12, 1996Assignee: Sandvik ABInventors: Goran Pantzar, Lars-Gunnar Wallstrom
-
Patent number: D369362Type: GrantFiled: March 16, 1995Date of Patent: April 30, 1996Assignee: Sandvik ABInventors: Goran Pantzar, Lars-Gunnar Wallstrom