Patents by Inventor Heiko Friederichs
Heiko Friederichs 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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Patent number: 11339655Abstract: The invention relates to a milling pick, in particular a round pick having a pick head and a pick tip, consisting of a hard material, wherein the pick tip has an attachment area, which is used to connect it to the pick head, wherein the pick tip has a concave area, which extends in the direction of the central longitudinal axis of the pick tip, and wherein the concave area has an elliptical contour. To achieve an improved resilience for such a milling pick, provision in made in accordance with the invention that the ellipse generating the elliptical contour is arranged in such a way that the semimajor of the ellipse and the central longitudinal axis of the pick tip form an acute angle.Type: GrantFiled: March 19, 2019Date of Patent: May 24, 2022Inventors: Heiko Friederichs, Ulrich Krämer
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Patent number: 11268382Abstract: The invention relates to a milling pick, in particular a round pick having a pick head (40), which has a pick tip (30) made of a hard material as a cutting element, wherein furthermore a pick shank (10) is provided, which is coupled directly or indirectly to the pick head (40), wherein a wear-protection disk (20) is provided, the cut-out of which, in particular a drilled hole, is pushed onto the pick shank (10), wherein the wear-protection disk (20) has, on its side facing the pick head (40), a counterface (23), which is designed to come into contact with a bearing surface (41) of the pick head (40), wherein the wear protection disk has, facing away from the counterface (23), an underside support surface (21), which is preferably parallel to the counterface (23), and wherein a disk thickness (d) is formed between the counterface (23) and the support surface (21), is characterized in that the ratio of the diameter of the pick shank (10) located in the area of the cut-out (25) to the thickness of the disk (d)Type: GrantFiled: March 19, 2019Date of Patent: March 8, 2022Inventors: Heiko Friederichs, Ulrich Krämer
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Patent number: 11131188Abstract: A round-shank pick having a pick head and a pick shank that includes a supporting element pierced along its longitudinal center axis by a mounting hole with an inside diameter for receiving the pick shank. A collar height, measured in the direction of the longitudinal center axis between an end, facing away from the seat surface, of the centering extension and the seat surface or between the end of the centering extension and an inner termination of a recess that is integrally formed in the supporting element in an indented manner with respect to the seat surface, is configured such that the ratio between the inside diameter of the mounting hole in the supporting element and the collar height is less than 8, and/or that the collar height is greater than an axial clearance of the pick mounted in a pick holder.Type: GrantFiled: July 30, 2020Date of Patent: September 28, 2021Inventors: Ulrich Kraemer, Heiko Friederichs
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Publication number: 20210115792Abstract: The invention relates to a milling pick, in particular a round pick having a pick head and a pick tip, consisting of a hard material, wherein the pick tip has an attachment area, which is used to connect it to the pick head, wherein the pick tip has a concave area, which extends in the direction of the central longitudinal axis of the pick tip, and wherein the concave area has an elliptical contour. To achieve an improved resilience for such a milling pick, provision in made in accordance with the invention that the ellipse generating the elliptical contour is arranged in such a way that the semimajor of the ellipse and the central longitudinal axis of the pick tip form an acute angle.Type: ApplicationFiled: March 19, 2019Publication date: April 22, 2021Inventors: Heiko Friederichs, Ulrich Krämer
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Publication number: 20210095564Abstract: The invention relates to a milling pick, in particular a round pick having a pick head (40), which has a pick tip (30) made of a hard material as a cutting element, wherein furthermore a pick shank (10) is provided, which is coupled directly or indirectly to the pick head (40), wherein a wear-protection disk (20) is provided, the cut-out of which, in particular a drilled hole, is pushed onto the pick shank (10), wherein the wear-protection disk (20) has, on its side facing the pick head (40), a counterface (23), which is designed to come into contact with a bearing surface (41) of the pick head (40), wherein the wear protection disk has, facing away from the counterface (23), an underside support surface (21), which is preferably parallel to the counterface (23), and wherein a disk thickness (d) is formed between the counterface (23) and the support surface (21), is characterized in that the ratio of the diameter of the pick shank (10) located in the area of the cut-out (25) to the thickness of the disk (d)Type: ApplicationFiled: March 19, 2019Publication date: April 1, 2021Inventors: Heiko Friederichs, Ulrich Krämer
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Publication number: 20200378254Abstract: A round-shank pick having a pick head and a pick shank that includes a supporting element pierced along its longitudinal center axis by a mounting hole with an inside diameter for receiving the pick shank. A collar height, measured in the direction of the longitudinal center axis between an end, facing away from the seat surface, of the centering extension and the seat surface or between the end of the centering extension and an inner termination of a recess that is integrally formed in the supporting element in an indented manner with respect to the seat surface, is configured such that the ratio between the inside diameter of the mounting hole in the supporting element and the collar height is less than 8, and/or that the collar height is greater than an axial clearance of the pick mounted in a pick holder.Type: ApplicationFiled: July 30, 2020Publication date: December 3, 2020Inventors: Ulrich Kraemer, Heiko Friederichs
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Patent number: 10801322Abstract: The invention relates to a cutting device for an earth working machine, having improved wear protection.Type: GrantFiled: July 11, 2016Date of Patent: October 13, 2020Assignees: Betek GmbH & Co. KG, Wirtgen GmbHInventors: Thomas Allgaier, Ulrich Krämer, Heiko Friederichs, Thomas Lehnert, Karsten Buhr, Cyrus Barimani
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Patent number: 10738610Abstract: A round-shank pick having a pick head and a pick shank that includes a supporting element pierced along its longitudinal center axis by a mounting hole with an inside diameter for receiving the pick shank. A collar height, measured in the direction of the longitudinal center axis between an end, facing away from the seat surface, of the centering extension and the seat surface or between the end of the centering extension and an inner termination of a recess that is integrally formed in the supporting element in an indented manner with respect to the seat surface, is configured such that the ratio between the inside diameter of the mounting hole in the supporting element and the collar height is less than 8, and/or that the collar height is greater than an axial clearance of the pick mounted in a pick holder.Type: GrantFiled: November 17, 2017Date of Patent: August 11, 2020Assignee: Betek GmbH & Co. KGInventors: Ulrich Kraemer, Heiko Friederichs
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Patent number: 10662770Abstract: The present invention relates to a pick, in particular, a round shaft pick, having a pick head and a pick shaft, having a support element which has a centering lug on the underside thereof, wherein the centering lug has a centering surface which extends inclined with respect to the central longitudinal axis of the pick and merges into a seat surface. To this end circumferential channel according to the present invention is disposed in the transition region from the centering surface to the seat surface and the depth of the channel relative to the seat surface is greater than or equal to 0.3 mm. The pick has an optimised rotatability and thus a low wear.Type: GrantFiled: February 28, 2019Date of Patent: May 26, 2020Assignee: Betek GmbH & Co. KGInventors: Karl Kammerer, Heiko Friederichs
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Patent number: 10563363Abstract: The invention relates to a scraper bar (20) for a scraper blade (68) of a road milling machine, having a carrier (10) that comprises a front side and a rearward installation surface (17), the carrier (10) comprising a cutting-element receptacle (13), cutting elements (30) being held, serially arranged along a longitudinal axis (L) extending in a width direction of the carrier (10), on or in the cutting-element receptacle (13), and the cutting elements (30) comprising a cutting edge (35.1) that transitions indirectly or directly into a rake surface (35). In order to improve the working result, provision is made according to the present invention that at least for some of the cutting elements (30), the cutting edge (35.1) is set at least locally not parallel to the longitudinal axis (L).Type: GrantFiled: July 24, 2018Date of Patent: February 18, 2020Assignees: Wirtgen GmbH, Betek GmbH & Co. KGInventors: Cyrus Barimani, Thomas Lehnert, Andreas Salz, Heiko Friederichs, Andreas Rapp, Simon Krämer, Ulrich Krämer
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Patent number: 10415385Abstract: A round-shank pick, comprising a pick head and a pick shank, the pick head including a base part and a cutting element, which is connected to the base part and is composed of a hard material, in particular hard metal, wherein the base part has a wear-resistant layer on the outer surface thereof at the connection to the cutting element, which wear-resistant layer covers at least one segment of the outer surface of the base part facing the cutting element and wherein an end face of the wear-resistant layer facing the cutting element is covered by the cutting element. The base part has an axially oriented cut-out for receiving a fastening segment of the cutting element, the base part has a counter surface facing the cutting element and extending around the cut-out, and the counter surface and the end face of the wear-resistant layer form a continuous flat surface.Type: GrantFiled: July 19, 2017Date of Patent: September 17, 2019Assignee: Betek GmbH & Co. KGInventors: Ulrich Kraemer, Heiko Friederichs, Christoph Haberstroh, Thomas Allgaier
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Publication number: 20190195069Abstract: The present invention relates to a pick, in particular, a round shaft pick, having a pick head and a pick shaft, having a support element which has a centering lug on the underside thereof, wherein the centering lug has a centering surface which extends inclined with respect to the central longitudinal axis of the pick and merges into a seat surface. To this end circumferential channel according to the present invention is disposed in the transition region from the centering surface to the seat surface and the depth of the channel relative to the seat surface is greater than or equal to 0.3 mm. The pick has an optimised rotatability and thus a low wear.Type: ApplicationFiled: February 28, 2019Publication date: June 27, 2019Applicant: Betek GmbH & Co. KGInventors: Karl KAMMERER, Heiko FRIEDERICHS
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Patent number: 10260341Abstract: The present invention relates to a pick, in particular, a round shaft pick, having a pick head and a pick shaft, having a support element which has a centring lug on the underside thereof, wherein the centring lug has a centring surface which extends inclined with respect to the central longitudinal axis of the pick and merges into a seat surface. To this end circumferential channel according to the present invention is disposed in the transition region from the centring surface to the seat surface and the depth of the channel relative to the seat surface is greater than or equal to 0.3 mm. The pick has an optimised rotatability and thus a low wear.Type: GrantFiled: September 23, 2016Date of Patent: April 16, 2019Assignee: Betek GmbH & Co. KGInventors: Karl Kammerer, Heiko Friederichs
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Patent number: 10227870Abstract: The invention relates to a chisel (10) having a chisel head (11) and a chisel shaft (17), wherein near its end facing away from the chisel head the chisel shaft has a threaded portion having a thread (19), wherein the chisel head holds a chisel tip (20) made of a hard material, and wherein near the side facing the chisel shaft the chisel head is provided with a supporting surface (15). Especially when superhard hard materials are used for the chisel tip, a load-optimized chisel design is obtained by a domed supporting surface (15).Type: GrantFiled: September 1, 2014Date of Patent: March 12, 2019Assignees: Betek GmbH & Co. KG, Wirtgen GmbHInventors: Thomas Lehnert, Karsten Buhr, Cyrus Barimani, Heiko Friederichs, Karl Kammerer, Markus Roth
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Patent number: D893869Type: GrantFiled: March 15, 2019Date of Patent: August 25, 2020Assignee: Betek GmbH & Co. KGInventors: Simon Krämer, Heiko Friederichs
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Patent number: D894599Type: GrantFiled: March 15, 2019Date of Patent: September 1, 2020Assignee: Betek GmbH & Co. KGInventors: Simon Krämer, Heiko Friederichs
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Patent number: D918973Type: GrantFiled: November 5, 2018Date of Patent: May 11, 2021Inventor: Heiko Friederichs
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Patent number: D927567Type: GrantFiled: April 9, 2021Date of Patent: August 10, 2021Inventor: Heiko Friederichs
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Patent number: D927568Type: GrantFiled: April 9, 2021Date of Patent: August 10, 2021Inventor: Heiko Friederichs
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Patent number: D927569Type: GrantFiled: April 9, 2021Date of Patent: August 10, 2021Inventor: Heiko Friederichs