Patents by Inventor Jan Hofmann
Jan Hofmann 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: 20230383750Abstract: A vacuum pump includes a fan including a rotational speed to be controlled to cool the vacuum pump, a temperature sensor, and a control device that regulates the rotational speed of the fan in dependence on a power consumption of a drive of the vacuum pump and on a temperature measured by the temperature sensor. Another vacuum pump includes an electrically driven fan, an air guide hood, and a conductor that leads from the fan to a supply connection for the fan. The conductor is connected to the supply connection via an electrical connector. The connector is separated from an air flow path, defined by the air guide hood, by a partition wall.Type: ApplicationFiled: August 14, 2023Publication date: November 30, 2023Applicant: PFEIFFER VACUUM GMBHInventors: Michael WILLIG, Jan HOFMANN, Jonas BECKER, Gernot BERNHARDT, Verena WANGORSCH, Stefan KALLENBORN, Wolfgang SOEHNGEN, Heiko SCHAEFER, Erhard HARAPAT, Lars PAULI
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Patent number: 11773849Abstract: The invention relates to a scroll pump comprising a pressure sensor integrated into the scroll pump.Type: GrantFiled: October 6, 2020Date of Patent: October 3, 2023Assignee: PFEIFFER VACUUM GmbHInventors: Michael Willig, Jan Hofmann, Jonas Becker, Gernot Bernhardt, Verena Wangorsch, Stefan Kallenborn, Wolfgang Soehngen, Heiko Schaefer, Erhard Harapat, Lars Pauli
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Publication number: 20230032071Abstract: A drive device for a protective hood of a machine includes a counterweight, a pulling means connecting the protective hood to the counterweight, a motor, and a freewheel. The freewheel connects the motor to the pulling means and is arranged to block when a weight force of the protective hood is greater than a weight force of the counterweight. The freewheel may be a linear freewheel or the freewheel may operate between two rotatable elements. The freewheel may be a frictionally locking freewheel or a positive locking freewheel.Type: ApplicationFiled: November 5, 2020Publication date: February 2, 2023Applicant: Schaeffler Technologies AG & Co. KGInventors: Julius Janssen, Klaus Sattler, Jan Hofmann
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Patent number: 11078916Abstract: The present invention relates to a vacuum pump, in particular to a turbomolecular pump, having at least one pump stage and having a pressure determination unit for determining a pressure present at a suction side of the vacuum pump, said pump comprising a measurement device, with a measurement tap of the measurement device being provided in the region of the pump stage or downstream of the pump stage.Type: GrantFiled: August 2, 2018Date of Patent: August 3, 2021Assignee: Pfeiffer Vacuum GmbHInventors: Jan Hofmann, Florian Schneider
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Publication number: 20210102536Abstract: The invention relates to a scroll pump comprising a pressure sensor integrated into the scroll pump.Type: ApplicationFiled: October 6, 2020Publication date: April 8, 2021Inventors: Michael WILLIG, Jan HOFMANN, Jonas BECKER, Gernot BERNHARDT, Verena WANGORSCH, Stefan KALLENBORN, Wolfgang SOEHNGEN, Heiko SCHAEFER, Erhard HARAPAT, Lars PAULI
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Patent number: 10527483Abstract: A system (1) dispenses dosages of a powdery substance. It has a robotic handler (2), a weighing module (8) with a weighing pan (9), at least one storage rack (4) for holding a plurality of dispensing heads (3) and at least one storage rack (6) for holding a plurality of vials (5), a dosage dispenser unit (11) with a dispensing head receiver (12), a vial handling tool (17) and a dispensing head handling tool (18), a tool-docking station (19) for the handling tools, and a controller terminal unit (20). Different weighing pan adapters (15) adapt the weighing pan to different shapes and sizes of vials. Relative to a vertical working orientation, tlower portions of the weighing pan adapters are identical, to fit the weighing pan, but upper portions are different, to accommodate different shapes and sizes of vials. A station (16) is provided for storing the weighing pan adapters.Type: GrantFiled: November 15, 2017Date of Patent: January 7, 2020Assignee: METTLER-TOLEDO GMBHInventors: Michalis Meyer, Daniel Keller, Jan Hofmann, René Weber
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Publication number: 20190040866Abstract: The present invention relates to a vacuum pump, in particular to a turbomolecular pump, having at least one pump stage and having a pressure determination unit for determining a pressure present at a suction side of the vacuum pump, said pump comprising a measurement device, with a measurement tap of the measurement device being provided in the region of the pump stage or downstream of the pump stage.Type: ApplicationFiled: August 2, 2018Publication date: February 7, 2019Inventors: Jan Hofmann, Florian Schneider
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Publication number: 20180149512Abstract: A system (1) dispenses dosages of a powdery substance. It has a robotic handler (2), a weighing module (8) with a weighing pan (9), at least one storage rack (4) for holding a plurality of dispensing heads (3) and at least one storage rack (6) for holding a plurality of vials (5), a dosage dispenser unit (11) with a dispensing head receiver (12), a vial handling tool (17) and a dispensing head handling tool (18), a tool-docking station (19) for the handling tools, and a controller terminal unit (20). Different weighing pan adapters (15) adapt the weighing pan to different shapes and sizes of vials. Relative to a vertical working orientation, tlower portions of the weighing pan adapaters are identical, to fit the weighing pan, but upper portions are different, to accommodate different shapes and sizes of vials. A station (16) is provided for storing the weighing pan adapters.Type: ApplicationFiled: November 15, 2017Publication date: May 31, 2018Inventors: Michalis Meyer, Daniel Keller, Jan Hofmann, René Weber
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Patent number: 9909592Abstract: A vacuum pump has a working space, a bearing space, a dividing wall arranged between the working space and the bearing space and at least one rotor shaft which extends through the dividing wall and which forms a gap with the dividing wall and having a blocking device for blocking between the working space and the bearing space. The blocking device is formed by a Siegbahn pump stage which is configured for providing a pump action passing through the gap between the working space and the bearing space.Type: GrantFiled: July 11, 2014Date of Patent: March 6, 2018Assignee: PFEIFFER VACUUM GMBHInventors: Jan Hofmann, Mirko Mekota
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Patent number: 9869319Abstract: A vacuum pump includes a pump inlet, a pump outlet, a rotor rotatable about an axis of rotation, at least one process gas pump stage for conveying a process gas present at the pump inlet from the pump inlet to the pump outlet, a motor space, and a drive motor which is arranged in the motor space, is configured for rotationally driving the rotor and which has a motor stator, wherein at least one gas path is provided for the process gas from the pump inlet to the pump outlet which leads through the motor space and which leads at least sectionally along the motor stator or through the motor stator.Type: GrantFiled: July 23, 2014Date of Patent: January 16, 2018Assignee: Pfeiffer Vacuum GmbHInventors: Mirko Mekota, Jan Hofmann, Uwe Leib, Michael Schill, Bernhard Koch
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Patent number: 9784284Abstract: A stator element for a Holweck pump stage has a base shape of substantially cylinder jacket shape or a kit of parts for a stator element for a Holweck pump stage which has a base shape of a substantially cylinder jacket shape, wherein the stator element or the kit of parts comprises a plurality of stator parts which are separate from one another, which are assembled to form the stator element or can be assembled to form the stator element. A vacuum pump having a Holweck pump stage as well as to a method of manufacturing a stator element for a Holweck pump stage or of manufacturing a kit of parts for a stator element for a Holweck pump stage are also disclosed.Type: GrantFiled: April 22, 2014Date of Patent: October 10, 2017Assignee: PFEIFFER VACCUM GMBHInventors: Jan Hofmann, Mirko Mekota
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Patent number: 9422937Abstract: The invention relates to a vacuum pump having at least one molecular pump stage, in particular a Holweck stage, which includes a rotor member which forms the pump-active surface of the molecular pump stage and having at least one side channel pump stage which is arranged downstream of the molecular pump stage and which includes a plurality of rotor elements, wherein the rotor elements of the side channel pump stage are supported by the rotor member of the molecular pump stage. The invention further relates to a vacuum pump having at least one molecular pump stage, in particular a Holweck stage, and having at least one side channel pump stage which is arranged downstream of the molecular pump stage and which includes a plurality of rotor elements, wherein the side channel pump stage is arranged between a pump inlet and the molecular pump stage.Type: GrantFiled: February 14, 2013Date of Patent: August 23, 2016Assignee: Pleiffer Vacuum GmbHInventors: Aleksandr Shirinov, Tobias Stoll, Michael Schweighoefer, Jan Hofmann
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Publication number: 20150064033Abstract: A vacuum pump includes a housing having an axial inlet a pumping unit including a stator, a rotor rotatably supported in the stator, and a drive for driving the rotor. At least one housing part which has at least one outlet, is placed on the housing in an axial direction and is connected with the housing.Type: ApplicationFiled: September 2, 2014Publication date: March 5, 2015Inventors: Tobias Stoll, Michael Schweighoefer, Robert Watz, Jan Hofmann
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Publication number: 20150030475Abstract: A vacuum pump includes a pump inlet, a pump outlet, a rotor rotatable about an axis of rotation, at least one process gas pump stage for conveying a process gas present at the pump inlet from the pump inlet to the pump outlet, a motor space, and a drive motor which is arranged in the motor space, is configured for rotationally driving the rotor and which has a motor stator, wherein at least one gas path is provided for the process gas from the pump inlet to the pump outlet which leads through the motor space and which leads at least sectionally along the motor stator or through the motor stator.Type: ApplicationFiled: July 23, 2014Publication date: January 29, 2015Inventors: Mirko Mekota, Jan Hofmann, Uwe Leib, Michael Schill, Bernhard Koch
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Publication number: 20150016958Abstract: A vacuum pump has a working space, a bearing space, a dividing wall arranged between the working space and the bearing space and at least one rotor shaft which extends through the dividing wall and which forms a gap with the dividing wall and having a blocking device for blocking between the working space and the bearing space. The blocking device is formed by a Siegbahn pump stage which is configured for providing a pump action passing through the gap between the working space and the bearing space.Type: ApplicationFiled: July 11, 2014Publication date: January 15, 2015Inventors: Jan Hofmann, Mirko Mekota
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Publication number: 20140314554Abstract: A stator element for a Holweck pump stage has a base shape of substantially cylinder jacket shape or a kit of parts for a stator element for a Holweck pump stage which has a base shape of a substantially cylinder jacket shape, wherein the stator element or the kit of parts comprises a plurality of stator parts which are separate from one another, which are assembled to form the stator element or can be assembled to form the stator element. A vacuum pump having a Holweck pump stage as well as to a method of manufacturing a stator element for a Holweck pump stage or of manufacturing a kit of parts for a stator element for a Holweck pump stage are also disclosed.Type: ApplicationFiled: April 22, 2014Publication date: October 23, 2014Applicant: Pfeiffer Vacuum GmbHInventors: Jan Hofmann, Mirko Mekota
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Publication number: 20130259711Abstract: A pumping system for evacuating gas from a plurality of chambers, includes at least one turbomolecular pump, at least two fore-vacuum pumps, at least one connection conduit extending between the at least two fore-vacuum pumps. and at least one transverse constriction for at least one of reducing and regulating gas flow.Type: ApplicationFiled: March 27, 2013Publication date: October 3, 2013Applicant: Pfeiffer Vaccum GmbHInventors: Thorsten BURGGRAF, Jan HOFMANN, Tobias STOLL
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Publication number: 20090269157Abstract: The invention relates to anchors for fixing an article (2) to a substrate (3). In order to improve such an anchor (4) in respect of its capacity to absorb transverse force in the event of earthquakes, the invention proposes that the anchor (4) have a conversion device (14) such that movement of an article (2) fixed with the anchor (4) relative to the substrate (3) and transverse to the longitudinal axis of the anchor (4) results predominantly in an increase in the axially acting pre-tensioning force of the anchor (4).Type: ApplicationFiled: September 11, 2007Publication date: October 29, 2009Inventors: Hannes Spieth, Peter Schillinger, Jan Hofmann