Patents by Inventor Antti Koskimaki
Antti Koskimaki 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: 20230294260Abstract: A piston guiding element, rock drilling machine and method for supporting a front end portion of a percussion piston of a rock drilling machine. The piston guiding element includes a braking recess at its rear end. The element further includes at least one bearing sleeve, which is provided with two axially successive slide bearing sections. Hydraulic fluid is conveyed between the slide bearing sections via a feed system.Type: ApplicationFiled: June 1, 2021Publication date: September 21, 2023Inventors: Antti KOSKIMAKI, Lars KANDELIN, Mikko HAMALAINEN, Timo KELA, Matti VIINIKKA, Esa LAAKKOLA
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Publication number: 20220176535Abstract: A rock drilling arrangement includes an impact device having a frame, pressure chambers in the frame, and a piston arranged in the impact device. The arrangement further includes a rear mounting arrangement for attaching the impact device to a carriage, a front mounting arrangement for attaching the impact device to a machine component, at least one fore pressure accumulator arranged on a front side of the rear mounting arrangement in an axial direction of the piston, and at least one rear pressure accumulator arranged on a back side of the rear mounting arrangement. The fore pressure accumulator and the rear pressure accumulator are connected to one of the pressure chambers and arranged to absorb pressure fluctuations in the pressure chambers.Type: ApplicationFiled: March 16, 2020Publication date: June 9, 2022Inventors: Antti KOSKIMAKI, Mikko HAMALAINEN, Matti VIINIKKA
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Patent number: 10550685Abstract: A component for a rock breaking system is magnetized into a state of remanent magnetization. The remanent magnetization of the component has a predetermined varying magnetization profile relative to geometry of the component, the varying magnetization profile describing varying magnetization intensity in the component relative to the geometry of the component.Type: GrantFiled: July 6, 2017Date of Patent: February 4, 2020Assignee: Sandvik Mining and Constuction OyInventors: Noora Kalevo, Vesa Uitto, Tuomo Pirinen, Antti Koskimaki
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Patent number: 10012024Abstract: A control valve for controlling flow of a pressure fluid in a breaking device includes a sleeve-like control valve having at least one opening enabling flow of the pressure fluid through the opening. The at least one opening includes at least one wall, at least a part of which is not arranged in a direction parallel to a radial direction of the control valve extending through the middle point of the cross section of the opening on the outer circumference of the control valve, such that the pressure fluid flowing through the opening may be arranged to rotate the control valve about the longitudinal axis of the control valve.Type: GrantFiled: July 1, 2015Date of Patent: July 3, 2018Assignee: SANDVIK MINING AND CONSTRUCTION OYInventors: Timo Leino, Timo Muuttonen, Antti Koskimaki, Ari Kotala
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Patent number: 9981370Abstract: A breaking device includes a frame, an impact device having a pressure chamber with a rear pressure chamber and a front pressure chamber. The breaking device further includes a first low pressure port at the rear pressure chamber, a first low pressure channel and a first low pressure accumulator connected to the first low pressure channel. The breaking device further includes a second low pressure port at the rear pressure chamber substantially opposite to the first low pressure port, second low pressure channel and a second low pressure accumulator connected to the second low pressure channel. The first low pressure accumulator and the second low pressure accumulator are arranged at the outer circumference of the frame of the breaking device at different positions in the axial direction of the breaking device.Type: GrantFiled: July 1, 2015Date of Patent: May 29, 2018Assignee: SANDVIK MINING and CONSTRUCTION OYInventors: Timo Kela, Timo Muuttonen, Antti Koskimaki
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Publication number: 20180010439Abstract: A component for a rock breaking system is magnetized into a state of remanent magnetization. The remanent magnetization of the component has a predetermined varying magnetization profile relative to geometry of the component, the varying magnetization profile describing varying magnetization intensity in the component relative to the geometry of the component.Type: ApplicationFiled: July 6, 2017Publication date: January 11, 2018Inventors: Noora KALEVO, Vesa UITTO, Tuomo PIRINEN, Antti KOSKIMAKI
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Patent number: 9737983Abstract: A percussion piston for a rock drill machine having a pilot cylinder, a distributor and a pressure medium includes a control edge configurable to cause a change in the position of the distributor in a direction parallel to the axial direction of the percussion piston as the percussion piston moves in the impact direction (A) in relation to the pilot cylinder. The control edge of the percussion piston includes at least one notch provided on the outer periphery of the control edge and arranged to cause a start of a state change for the distributor before the control edge of the percussion piston passes by a corresponding control edge provided on the distributor or pilot cylinder.Type: GrantFiled: November 19, 2015Date of Patent: August 22, 2017Assignee: SANDVIK MINING AND CONSTRUCTION OYInventors: Timo Muuttonen, Antti Koskimäki, Ari Kotala, Timo Leino
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Publication number: 20160144498Abstract: A percussion piston for a rock drill machine having a pilot cylinder, a distributor and a pressure medium includes a control edge configurable to cause a change in the position of the distributor in a direction parallel to the axial direction of the percussion piston as the percussion piston moves in the impact direction (A) in relation to the pilot cylinder.Type: ApplicationFiled: November 19, 2015Publication date: May 26, 2016Inventors: Timo MUUTTONEN, Antti KOSKIMÄKI, Ari KOTALA, Timo LEINO
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Publication number: 20160001432Abstract: A breaking device includes a frame, an impact device having a pressure chamber with a rear pressure chamber and a front pressure chamber. The breaking device further includes a first low pressure port at the rear pressure chamber, a first low pressure channel and a first low pressure accumulator connected to the first low pressure channel. The breaking device further includes a second low pressure port at the rear pressure chamber substantially opposite to the first low pressure port, second low pressure channel and a second low pressure accumulator connected to the second low pressure channel. The first low pressure accumulator and the second low pressure accumulator are arranged at the outer circumference of the frame of the breaking device at different positions in the axial direction of the breaking device.Type: ApplicationFiled: July 1, 2015Publication date: January 7, 2016Inventors: Timo KELA, Timo MUUTTONEN, Antti KOSKIMAKI
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Publication number: 20160003372Abstract: A control valve for controlling flow of a pressure fluid in a breaking device includes a sleeve-like control valve having at least one opening enabling flow of the pressure fluid through the opening. The at least one opening includes at least one wall, at least a part of which is not arranged in a direction parallel to a radial direction of the control valve extending through the middle point of the cross section of the opening on the outer circumference of the control valve, such that the pressure fluid flowing through the opening may be arranged to rotate the control valve about the longitudinal axis of the control valve.Type: ApplicationFiled: July 1, 2015Publication date: January 7, 2016Inventors: Timo LEINO, Timo MUUTTONEN, Antti KOSKIMAKI, Ari KOTALA
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Patent number: 8800425Abstract: The invention relates to a percussion device having a body and a percussion piston moving therein, pressure fluid spaces in the rear and front ends of the percussion piston and pressure fluid channels for feeding pressure fluid into the percussion device. The percussion piston and the control valve comprise surfaces, which, when aligned, substantially close the pressure fluid flow from the pressure fluid space locating behind the percussion piston in front of the control valve, whereby the produced pressure displaces the control valve to another position.Type: GrantFiled: December 19, 2007Date of Patent: August 12, 2014Assignee: Sandvik Mining and Construction OyInventors: Antti Koskimäki, Ari Kotala
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Publication number: 20100059242Abstract: The invention relates to a percussion device having a body and a percussion piston moving therein, pressure fluid spaces in the rear and front ends of the percussion piston and pressure fluid channels for feeding pressure fluid into the percussion device. The percussion piston and the control valve comprise surfaces, which, when aligned, substantially close the pressure fluid flow from the pressure fluid space locating behind the percussion piston in front of the control valve, whereby the produced pressure displaces the control valve to another position.Type: ApplicationFiled: December 19, 2007Publication date: March 11, 2010Applicant: SANDVIK MINING AND CONSTRUCTION OYInventors: Antti Koskimäki, Ari Kotala
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Patent number: 7464635Abstract: The invention relates to a percussion device comprising two percussion pistons alternately making a percussion motion and a control valve for controlling the percussion pistons. The control valve (7) comprises a slide (8) affected by a force so that the slide is generally in a first position, but moves at the end of the percussion motion of the first percussion piston from the first position to a second position and correspondingly back to the first position at the end of the percussion motion of the second percussion piston (4).Type: GrantFiled: May 7, 2004Date of Patent: December 16, 2008Assignee: Sandvik Mining and Construction OyInventors: Esa Rantala, Jarmo Heinonen, Antti Koskimäki
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Patent number: 7178447Abstract: The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device (1) for breaking rock includes an impact element (8) controlled by a control valve (2). The control valve includes a control element (5) arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The control element, during a working cycle of the control valve, is arranged to open and close pressure channels at several connecting moments so that during one working cycle of the valve, several impact pulses are arranged to be produced.Type: GrantFiled: February 23, 2004Date of Patent: February 20, 2007Assignee: Sandvik Tamrock OyInventors: Antti Koskimäki, Markku Keskiniva, Jorma Mäki, Mauri Esko, Erkki Ahola, Aimo Helin
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Patent number: 7174824Abstract: The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. The percussion device (1) used for breaking rock comprises an impact element (8), which is controlled by a control valve (2). The control valve comprises a control element (5), which is arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The movement of the control element to its extreme position is arranged to form a closed pressure space, where pressure medium compresses and converts kinetic energy of the control element into pressure energy. The pressure energy is re-converted into kinetic energy and utilized when the control element changes its direction.Type: GrantFiled: February 23, 2004Date of Patent: February 13, 2007Assignee: Sahdvik Tamrock OyInventors: Antti Koskimäki, Markku Keskiniva, Jorma Mäki, Erkki Ahola
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Publication number: 20060175091Abstract: The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. The percussion device (1) used for breaking rock comprises an impact element (8), which is controlled by a control valve (2). The control valve comprises a control element (5), which is arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The movement of the control element to its extreme position is arranged to form a closed pressure space, where pressure medium compresses and converts kinetic energy of the control element into pressure energy. The pressure energy is re-converted into kinetic energy and utilized when the control element changes its direction.Type: ApplicationFiled: February 23, 2004Publication date: August 10, 2006Inventors: Antti Koskimaki, Markku Keskiniva, Jorma Maki, Erkki Ahola
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Publication number: 20060169468Abstract: The invention relates to a control valve, a percussion device and a method of controlling a working cycle of a percussion device. A percussion device (1) for breaking rock includes an impact element (8) controlled by a control valve (2). The control valve includes a control element (5) arranged to control channels (7b) leading to a working pressure surface (9) of the impact element (8). The control element, during a working cycle of the control valve, is arranged to open and close pressure channels at several connecting moments so that during one working cycle of the valve, several impact pulses are arranged to be produced.Type: ApplicationFiled: February 23, 2004Publication date: August 3, 2006Inventors: Antti Koskimaki, Markku Keskiniva, Jorma Maki, Mauri Esko, Erkki Ahola, Aimo Helin
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Patent number: 6938702Abstract: A method and an equipment for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device for producing impact energy to a tool of the rock drilling apparatus, a rotating device for rotating the tool in a drill hole, a feeding device for feeding the tool in the drill hole and a flushing device for supplying flushing agent through the tool and the bit for flushing loose drilling waste from the hole. The feed force and the percussion power are determined and the relation between the feed force and the percussion power is adjusted to a targeted operation area within an upper and a lower limit.Type: GrantFiled: December 5, 2002Date of Patent: September 6, 2005Assignee: Sandvik Inteleectual Property ABInventors: Heikki Saha, Markku Keskiniva, Antti Koskimäki, Esa Rantala, Tapani Pöysti, Vesa Peltonen, Jaakko Niemi, Timo Kemppainen, Vesa Uitto, Pauli Lemmetty
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Patent number: 6877569Abstract: A method for controlling the operating cycle of an impact device, and an impact device. Percussion piston position is measured using a sensor (11) from which the measurement data is transmitted to a control unit (12) of the impact device, which in turn controls an electrically driven control valve (10).Type: GrantFiled: November 7, 2003Date of Patent: April 12, 2005Assignee: Sandvik Tamrock OyInventor: Antti Koskimäki
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Publication number: 20050056439Abstract: A method and an equipment for controlling the operation of a rock drilling apparatus, which rock drilling apparatus comprises a percussion device for producing impact energy to a tool of the rock drilling apparatus, a rotating device for rotating the tool in a drill hole, a feeding device for feeding the tool in the drill hole and a flushing device for supplying flushing agent through the tool and the bit for flushing loose drilling waste from the hole. The feed force and the percussion power are determined and the relation between the feed force and the percussion power is adjusted to a targeted operation area within an upper and a lower limit.Type: ApplicationFiled: December 5, 2002Publication date: March 17, 2005Inventors: Heikki Saha, Markku Kesiniva, Antti Koskimaki, Esa Rantala, Tapani Poysti, Vesa Peltonen, Jaakko Niemi, Timo Kemppainen, Vesa Uitto, Pauli Lemmetty