Patents by Inventor Roland Wiktor
Roland Wiktor 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: 11859531Abstract: An auxiliary generator drive for a belt driven generator being powered by an internal engine, the auxiliary generator drive including a hydraulic motor, wherein the hydraulic motor is arranged and adapted to drive the generator and to be driven via a hydraulic pump powered by the internal engine.Type: GrantFiled: February 4, 2022Date of Patent: January 2, 2024Assignee: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Heinz Tiedemann, Anton Mahler, Roland Wiktor
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Publication number: 20220252002Abstract: An auxiliary generator drive for a belt driven generator being powered by an internal engine, the auxiliary generator drive including a hydraulic motor, wherein the hydraulic motor is arranged and adapted to drive the generator and to be driven via a hydraulic pump powered by the internal engine.Type: ApplicationFiled: February 4, 2022Publication date: August 11, 2022Inventors: Heinz Tiedemann, Anton Mahler, Roland Wiktor
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Patent number: 11306445Abstract: A hydraulic system for a working machine includes a feeding pump; and a plurality of variable displacement hydraulic machines being connected in parallel to the feeding pump; At least one of the variable displacement hydraulic machines is adapted to drive a ground engagement element of the working machine, and at least one of the variable displacement hydraulic machines is adapted to drive a vibrator for vibrating a ground engagement element of the working machine.Type: GrantFiled: June 7, 2017Date of Patent: April 19, 2022Assignee: Volvo Construction Equipment ABInventor: Roland Wiktor
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Patent number: 10961667Abstract: A paver includes a main vehicle body and a set of fore-wheels. The set of fore-wheels is connected to the main vehicle body via a hydraulic wheel suspension system which, in at least a paving mode of the paver, allows hydraulic level compensation for each wheel of the set of fore-wheels. The paver further includes a hydraulic motion control assembly adapted to selectively provide hydraulic spring suspension and/or hydraulic dampening to at least one wheel of the set of fore-wheels.Type: GrantFiled: December 20, 2017Date of Patent: March 30, 2021Assignee: Volvo Construction Equipment ABInventor: Roland Wiktor
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Patent number: 10669677Abstract: A hydraulic system for driving a vibratory mechanism of a compaction roller includes at least one hydraulic motor connectable to a vibratory mechanism and a first hydraulic pump fluidly connected to the at least one hydraulic motor and arranged for supplying pressurised hydraulic fluid to the at least one hydraulic motor. The hydraulic system further includes a second hydraulic pump fluidly connected to the at least one hydraulic motor and arranged for supplying pressurised hydraulic fluid to the at least one hydraulic motor. A corresponding method for controlling a vibratory mechanism of a compaction roller is also provided.Type: GrantFiled: December 16, 2013Date of Patent: June 2, 2020Assignee: Volvo Construction Equipment ABInventors: Roland Wiktor, Erik Gustaf Lilljebjörn
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Publication number: 20200157749Abstract: A hydraulic system for a working machine includes a feeding pump; and a plurality of variable displacement hydraulic machines being connected in parallel to the feeding pump; At least one of the variable displacement hydraulic machines being is adapted to drive a ground engagement element of the working machine, and at least one of the variable displacement hydraulic machines is adapted to drive a vibrator for vibrating a ground engagement element of the working machine.Type: ApplicationFiled: June 7, 2017Publication date: May 21, 2020Inventor: Roland Wiktor
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Publication number: 20200095736Abstract: A paver includes a main vehicle body and a set of fore-wheels. The set of fore-wheels is connected to the main vehicle body via a hydraulic wheel suspension system which, in at least a paving mode of the paver, allows hydraulic level compensation for each wheel of the set of fore-wheels. The paver further includes a hydraulic motion control assembly adapted to selectively provide hydraulic spring suspension and/or hydraulic dampening to at least one wheel of the set of fore-wheels.Type: ApplicationFiled: December 20, 2017Publication date: March 26, 2020Inventor: Roland WIKTOR
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Patent number: 9926005Abstract: A pressurized medium assembly includes a first working chamber and a second working chamber. The first and second working chambers are adapted to together produce a load. The pressurized medium assembly includes a first control arrangement adapted to provide a fluid communication between the first working chamber and a pressure line in an on/off manner. The pressurized medium assembly further includes a second control arrangement adapted to provide a fluid communication between the second working chamber and a pressure line. The second control arrangement is adapted to proportionally regulate the pressure in the second working chamber.Type: GrantFiled: November 20, 2012Date of Patent: March 27, 2018Assignee: Volvo Construction Equipment ABInventors: Roland Wiktor, Kim Heybroek
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Patent number: 9863449Abstract: A hydraulic system for a working machine includes a hydraulic actuator and a first hydraulic machine for supplying fluid to the hydraulic actuator. The hydraulic system further includes a hydraulic transformer for supplying fluid to the hydraulic actuator in parallel with the first hydraulic machine, and an accumulator for fluid. The hydraulic transformer includes a first port and a second port and the transformer is adapted to transform a first pressure and a first flow at the first port to a second pressure and a second flow at the second port. The second port of the hydraulic transformer is in fluid communication with the hydraulic actuator and the first port is in communication with the accumulator.Type: GrantFiled: May 31, 2011Date of Patent: January 9, 2018Assignee: Volvo Construction Equipment ABInventors: Kim Heybroek, Roland Wiktor
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Publication number: 20160319496Abstract: A hydraulic system for driving a vibratory mechanism of a compaction roller includes at least one hydraulic motor connectable to a vibratory mechanism and a first hydraulic pump fluidly connected to the at least one hydraulic motor and arranged for supplying pressurised hydraulic fluid to the at least one hydraulic motor. The hydraulic system further includes a second hydraulic pump fluidly connected to the at least one hydraulic motor and arranged for supplying pressurised hydraulic fluid to the at least one hydraulic motor. A corresponding method for controlling a vibratory mechanism of a compaction roller is also provided.Type: ApplicationFiled: December 16, 2013Publication date: November 3, 2016Applicant: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Roland WIKTOR, Erik Gustaf LILLJEBJÖN
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Publication number: 20150298730Abstract: A pressurized medium assembly includes a first working chamber and a second working chamber. The first and second working chambers are adapted to together produce a load. The pressurized medium assembly includes a first control arrangement adapted to provide a fluid communication between the first working chamber and a pressure line in an on/off manner. The pressurized medium assembly further includes a second control arrangement adapted to provide a fluid communication between the second working chamber and a pressure line. The second control arrangement is adapted to proportionally regulate the pressure in the second working chamber.Type: ApplicationFiled: November 20, 2012Publication date: October 22, 2015Applicant: VOLVO CONSTRUCTION EQUIPMENT ABInventors: Roland Wiktor, Kim Heybroek
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Publication number: 20140123634Abstract: A hydraulic system for a working machine includes a hydraulic actuator and a first hydraulic machine for supplying fluid to the hydraulic actuator. The hydraulic system further includes a hydraulic transformer for supplying fluid to the hydraulic actuator in parallel with the first hydraulic machine, and an accumulator for fluid. The hydraulic transformer includes a first port and a second port and the transformer is adapted to transform a first pressure and a first flow at the first port to a second pressure and a second flow at the second port. The second port of the hydraulic transformer is in fluid communication with the hydraulic actuator and the first port is in communication with the accumulator.Type: ApplicationFiled: May 31, 2011Publication date: May 8, 2014Applicant: VOLVO CONSTRUCTIONS EQUIPMENT ABInventors: Kim Heybroek, Roland Wiktor