Patents by Inventor Hakan Carlsson
Hakan Carlsson 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: 11919199Abstract: A cutting and dust or slurry collecting assembly that comprises: a) a circular saw blade (4) b) a blade guard (5) c) a cover device (6), and the cover device (6) has a front end (31), a rear end (32), a top surface (34), a bottom surface (36), elongated sidewalls (35), and a longitudinal passage (45,46) for the saw blade, d) the blade guard (5) and the cover device (6) being pivotally connected or connectable to one another via a hinge (40) in or adjacent to a lower rear corner of the blade guard (5), such that the cover device and the blade guard can be turned in relation to each other, e) a discharge member (52) is provided at the rear of said hinge and has an outlet (58) which can be connected to a vacuum source, f) a connection member (12) connects the discharge member (52) with at least one of the longitudinal passage (45, 46) and the cut created rear of the longitudinal passage, g) that the direction of rotation of the saw blade (4) is such that a circumferential part of the blade which has passed beyonType: GrantFiled: April 26, 2017Date of Patent: March 5, 2024Assignee: HUSQVARNA ABInventors: Pär Carlsson, Håkan Pinzani, Paulo Varella
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Patent number: 11818826Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to receive operational data from a measuring device indicative of the measured power of microwaves transmitted from the magnetron and receive operational data from the measuring device indicative of the measured anode current of the magnetron. A calculating device calculates an efficiency of the magnetron as a function of the measured power of the transmitted microwaves and the measured anode current, to define a determined efficiency. The control unit controls the cooling unit and cools the magnetron based on the determined efficiency.Type: GrantFiled: January 11, 2021Date of Patent: November 14, 2023Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Patent number: 11765799Abstract: A method and apparatus for operating a microwave heating apparatus includes a microwave source adapted to feed microwaves to a cavity via a transmission line, including measuring a power of microwaves transmitted from the microwave source to the cavity, receiving operational data indicative of the power supplied to the microwave source, and adjusting at least one of an impedance of the transmission line or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data.Type: GrantFiled: October 22, 2020Date of Patent: September 19, 2023Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Patent number: 11464085Abstract: An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure a standing wave for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured standing wave correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.Type: GrantFiled: August 7, 2019Date of Patent: October 4, 2022Assignee: Whirlpool CorporationInventors: Hakan Carlsson, Ulf Nordh
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Patent number: 11277890Abstract: A microwave heating apparatus and a method of operating a microwave heating apparatus are provided. The microwave heating apparatus comprises a load receiving cavity, at least one microwave source, a plurality of feeding ports connected to the microwave source and the cavity for feeding microwaves to the cavity, a measuring unit and a control unit. The measuring unit measures, for at least one frequency or within a frequency range, the power of microwaves reflected back to the microwave source for at least part of the plurality of feeding ports. The control unit selects at least one of the feeding ports based on the measured powers of the reflected microwaves in order to feed microwaves to the cavity via the at least one selected feeding port during operation of the microwave heating apparatus at the at least one frequency or within the frequency range.Type: GrantFiled: March 13, 2018Date of Patent: March 15, 2022Assignee: Whirlpool CorporationInventors: Olle Niklasson, Hakan Carlsson, Ulf Nordh, Fredrik Hallgren
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Patent number: 11191134Abstract: A microwave heating apparatus and a method for heating/browning a piece of food by means of microwaves are provided. The microwave heating apparatus comprises a cavity arranged to receive, in a substantially horizontal browning region, a piece of food to be browned. The microwave heating apparatus further comprises a microwave source for generating microwaves and a rotatable antenna arranged at the cavity bottom for supplying the generated microwaves. The antenna is configured to produce at least one radiating lobe pointing towards the browning region such that the intersection between the radiating lobe and the browning region forms a hot spot, thereby forming a ring-shaped heating pattern in the browning region under rotation of the antenna. The present invention is advantageous in that a microwave heating apparatus with an improved crisp function is provided.Type: GrantFiled: December 22, 2016Date of Patent: November 30, 2021Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Publication number: 20210136882Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to receive operational data from a measuring device indicative of the measured power of microwaves transmitted from the magnetron and receive operational data from the measuring device indicative of the measured anode current of the magnetron. A calculating device calculates an efficiency of the magnetron as a function of the measured power of the transmitted microwaves and the measured anode current, to define a determined efficiency. The control unit controls the cooling unit and cools the magnetron based on the determined efficiency.Type: ApplicationFiled: January 11, 2021Publication date: May 6, 2021Inventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Publication number: 20210045201Abstract: A method and apparatus for operating a microwave heating apparatus comprising a microwave source adapted to feed microwaves to a cavity via a transmission line, including measuring a power of microwaves transmitted from the microwave source to the cavity, receiving operational data indicative of the power supplied to the microwave source, and adjusting at least one of an impedance of the transmission line or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data.Type: ApplicationFiled: October 22, 2020Publication date: February 11, 2021Inventors: ULF NORDH, HAKAN CARLSSON, OLLE NIKLASSON, FREDRIK HALLGREN
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Patent number: 10912161Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to determine the efficiency of the microwave source and then to control the cooling based on the determined efficiency. The methods and the microwave heating apparatuses of the present invention are advantageous with respect to energy consumption.Type: GrantFiled: July 31, 2018Date of Patent: February 2, 2021Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Patent number: 10820383Abstract: A method and apparatus for operating a microwave heating apparatus includes a microwave source adapted to feed microwaves to a cavity via a transmission line, including measuring a power of microwaves transmitted from the microwave source to the cavity, receiving operational data indicative of the power supplied to the microwave source, and adjusting at least one of an impedance of the transmission line or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data.Type: GrantFiled: January 5, 2018Date of Patent: October 27, 2020Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Publication number: 20190364622Abstract: An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure a standing wave for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured standing wave correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.Type: ApplicationFiled: August 7, 2019Publication date: November 28, 2019Inventors: HAKAN CARLSSON, ULF NORDH
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Patent number: 10390387Abstract: An apparatus and a method for heating a load using microwaves is disclosed. The apparatus includes a transmission line, configured to transmit microwaves from a microwave generator to a cavity. A sensing device configured to measure electromagnetic field strengths for providing information about the phase and the amplitude of a reflection coefficient that represents a ratio between the amount of microwaves reflected back towards the microwave generator and the amount of microwaves transmitted in the transmission line from the microwave generator. A control unit configured to detect whether the measured electromagnetic field strengths correspond to a reflection coefficient having a phase within a certain interval of phases and an amplitude within a certain interval of amplitudes. Additionally, certain intervals of phases and amplitudes correspond to an operating region of the microwave generator. The control unit controls feeding of microwaves to the cavity based on this detection.Type: GrantFiled: April 25, 2016Date of Patent: August 20, 2019Assignee: Whirlpool CorporationInventors: Hakan Carlsson, Ulf Nordh
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Publication number: 20190203712Abstract: A system for a utility vehicle has a screw compressor and an electric motor. The electric motor drives the screw compressor. The electric motor is connected to the screw compressor by a flange which has at least one cooling connection, and a cooling channel is provided in the flange.Type: ApplicationFiled: March 8, 2019Publication date: July 4, 2019Inventors: Gilles HEBRARD, Jean-Baptiste MARESCOT, Joerg MELLAR, Thomas WEINHOLD, Hakan CARLSSON
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Publication number: 20190053335Abstract: The present disclosure relates to a microwave heating apparatus and method of heating a load using microwaves. The microwave heating apparatus comprises a cavity dividable into at least two compartments, a first microwave generator and a first feeding port for feeding a first mode field in a first compartment of the cavity, a second microwave generator and a second feeding port for feeding a second mode field in a second compartment of the cavity. The first mode field and the second mode field provide complementary heating patterns in the cavity when the cavity is undivided. The present disclosure provides the flexibility of heating a load in a large cavity or heating a plurality of loads in smaller compartments of the cavity while still providing even heating in the cavity and in the compartments.Type: ApplicationFiled: October 15, 2018Publication date: February 14, 2019Inventors: HAKAN CARLSSON, JUAN CHEN, FREDRIK B. HALLGREN, ULF NORDH, PATRIK RYDIN
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Publication number: 20180359821Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to determine the efficiency of the microwave source and then to control the cooling based on the determined efficiency. The methods and the microwave heating apparatuses of the present invention are advantageous with respect to energy consumption.Type: ApplicationFiled: July 31, 2018Publication date: December 13, 2018Inventors: ULF NORDH, HAKAN CARLSSON, OLLE NIKLASSON, FREDRIK HALLGREN
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Patent number: 10129936Abstract: The present disclosure relates to a microwave heating apparatus and method of heating a load using microwaves. The microwave heating apparatus comprises a cavity dividable into at least two compartments, a first microwave generator and a first feeding port for feeding a first mode field in a first compartment of the cavity, a second microwave generator and a second feeding port for feeding a second mode field in a second compartment of the cavity. The first mode field and the second mode field provide complementary heating patterns in the cavity when the cavity is undivided. The present disclosure provides the flexibility of heating a load in a large cavity or heating a plurality of loads in smaller compartments of the cavity while still providing even heating in the cavity and in the compartments.Type: GrantFiled: December 17, 2012Date of Patent: November 13, 2018Assignee: Whirlpool CorporationInventors: Hakan Carlsson, Juan Chen, Fredrik Hallgren, Ulf Nordh, Patrik Rydin
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Patent number: 10064247Abstract: A microwave heating apparatus and methods of controlling cooling of a microwave heating apparatus are provided. The microwave heating apparatus typically includes a microwave source for generating microwaves, a cooling unit for cooling the microwave source and a control unit. According to one embodiment, the control unit is configured to determine the efficiency of the microwave source and then to control the cooling based on the determined efficiency. The methods and the microwave heating apparatuses of the present invention are advantageous with respect to energy consumption.Type: GrantFiled: September 4, 2015Date of Patent: August 28, 2018Assignee: Whirlpool CorporationInventors: Ulf Nordh, Hakan Carlsson, Olle Niklasson, Fredrik Hallgren
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Publication number: 20180206297Abstract: A microwave heating apparatus and a method of operating a microwave heating apparatus are provided. The microwave heating apparatus comprises a load receiving cavity, at least one microwave source, a plurality of feeding ports connected to the microwave source and the cavity for feeding microwaves to the cavity, a measuring unit and a control unit. The measuring unit measures, for at least one frequency or within a frequency range, the power of microwaves reflected back to the microwave source for at least part of the plurality of feeding ports. The control unit selects at least one of the feeding ports based on the measured powers of the reflected microwaves in order to feed microwaves to the cavity via the at least one selected feeding port during operation of the microwave heating apparatus at the at least one frequency or within the frequency range.Type: ApplicationFiled: March 13, 2018Publication date: July 19, 2018Applicant: Whirlpool CorporationInventors: Olle NIKLASSON, Hakan CARLSSON, Ulf NORDH, Fredrik HALLGREN
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Publication number: 20180132311Abstract: A method and apparatus for operating a microwave heating apparatus comprising a microwave source adapted to feed microwaves to a cavity via a transmission line, including measuring a power of microwaves transmitted from the microwave source to the cavity, receiving operational data indicative of the power supplied to the microwave source, and adjusting at least one of an impedance of the transmission line or the impedance matching between the microwave source and the transmission line based on the measured power of the transmitted microwaves and the received operational data.Type: ApplicationFiled: January 5, 2018Publication date: May 10, 2018Inventors: ULF NORDH, HAKAN CARLSSON, OLLE NIKLASSON, FREDRIK HALLGREN
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Patent number: D966068Type: GrantFiled: August 25, 2020Date of Patent: October 11, 2022Assignee: Hultafors Group ABInventors: Peter Ejvinsson, Hans Nyström, Per Eriksson, Håkan Carlsson