Patents by Inventor Masatsugu Hamasaki
Masatsugu Hamasaki 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: 9487930Abstract: A drive device for a construction machine includes a speed reducer and a brake mechanism. The speed reducer includes a rotating shaft disposed in a casing, and a planetary gear type speed reducing unit disposed in the casing. The speed reducing unit includes a sun gear, a ring gear, a planetary gear which is meshed with the sun gear and the ring gear, and a spider member which supports the planetary gear so that the planetary gear is rotatable. The brake mechanism includes a rotating-shaft-side brake plate provided on an outer periphery of the spider member in a state that the rotating-shaft-side brake plate is integrally rotated with the spider member, a casing-side brake plate provided on the casing, and a brake piston which generates the braking force by bringing the rotating-shaft-side brake plate and the casing-side brake plate to press contact with each other.Type: GrantFiled: April 11, 2013Date of Patent: November 8, 2016Assignee: KOBELCO CONSTRUCTION MACHINERY CO., LTD.Inventors: Masatsugu Hamasaki, Koji Yamashita, Shoji Yoichi, Ryo Uchiyama
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Patent number: 9476498Abstract: A drive device for a construction machine, which includes a speed reducer and a brake mechanism, wherein the speed reducer has a casing in which lubricating oil and the brake mechanism are provided, and wherein the brake mechanism includes: a ring-shaped brake piston; and a brake plate configured to generate a braking force by a pressing force of the brake piston, and wherein the brake piston has: a plurality of oil pockets provided in the brake piston at respective positions along a circumferential direction of the brake piston, each of the oil pockets formed as a space capable of storing lubricating oil; oil inlets allowing lubricating oil rising during operation of the drive device to be introduced into the oil pockets respectively; and oil outlets allowing lubricating oil stored in the respective oil pockets to be discharged.Type: GrantFiled: April 11, 2013Date of Patent: October 25, 2016Assignees: KOBELCO CONSTRUCTION MACHINERY CO., LTD., Kobe Steel, Ltd.Inventors: Masatsugu Hamasaki, Koji Yamashita, Masashi Kawabata, Shoji Yoichi, Ryo Uchiyama
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Patent number: 9328817Abstract: A drive device for a construction machine includes a speed reduction unit reducing speed of rotational force output from a motor, the speed reduction unit has a gear mechanism provided in a casing and reducing the speed of the rotational force output from the motor, and an oil receiver arranged above the gear mechanism in the casing, the oil receiver forms a main storage space for storing the lubricant oil, and is arranged in the casing such that an oil passage for guiding a rising lubricant oil to the main storage space is formed between an outer surface of the oil receiver and an inner wall surface of the casing, the oil receiver is provided with an oil drain opening, the oil drain opening designed to gradually discharge the lubricant oil stored in the main storage space toward the gear mechanism through the oil drain opening.Type: GrantFiled: December 11, 2012Date of Patent: May 3, 2016Assignees: KOBELCO CONSTRUCTION MACHINERY CO., LTD., Kobe Steel, Ltd.Inventors: Koji Yamashita, Masatsugu Hamasaki, Masashi Kawabata, Shoji Yoichi, Ryo Uchiyama
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Publication number: 20150126319Abstract: A drive device for a construction machine, which includes a speed reducer and a brake mechanism, wherein the speed reducer has a casing in which lubricating oil and the brake mechanism are provided, and wherein the brake mechanism includes: a ring-shaped brake piston; and a brake plate configured to generate a braking force by a pressing force of the brake piston, and wherein the brake piston has: a plurality of oil pockets provided in the brake piston at respective positions along a circumferential direction of the brake piston, each of the oil pockets formed as a space capable of storing lubricating oil; oil inlets allowing lubricating oil rising during operation of the drive device to be introduced into the oil pockets respectively; and oil outlets allowing lubricating oil stored in the respective oil pockets to be discharged.Type: ApplicationFiled: April 11, 2013Publication date: May 7, 2015Applicants: KOBELCO CONSTRUCTION MACHINERY CO., LTD., KABUSHIKI KAISHA KOBE SEIKO SHO (Kobe Steel, Ltd.)Inventors: Masatsugu Hamasaki, Koji Yamashita, Masashi Kawabata, Shoji Yoichi, Ryo Uchiyama
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Publication number: 20150099604Abstract: A drive device for a construction machine includes a speed reducer and a brake mechanism. The speed reducer includes a rotating shaft disposed in a casing, and a planetary gear type speed reducing unit disposed in the casing. The speed reducing unit includes a sun gear, a ring gear, a planetary gear which is meshed with the sun gear and the ring gear, and a spider member which supports the planetary gear so that the planetary gear is rotatable. The brake mechanism includes a rotating-shaft-side brake plate provided on an outer periphery of the spider member in a state that the rotating-shaft-side brake plate is integrally rotated with the spider member, a casing-side brake plate provided on the casing, and a brake piston which generates the braking force by bringing the rotating-shaft-side brake plate and the casing-side brake plate to press contact with each other.Type: ApplicationFiled: April 11, 2013Publication date: April 9, 2015Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTD.Inventors: Masatsugu Hamasaki, Koji Yamashita, Shoji Yoichi, Ryo Uchiyama
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Patent number: 8992368Abstract: A drive apparatus for a construction machine includes: a motor having a motor shaft; a speed reducer unit having a speed reducer output shaft and a casing and reducing speed of rotation force of the motor, and transmitting the force to an upper slewing body; and a cooler formed with a coolant path through which liquid or gas for cooling lubricating oil inside the casing passes as a cooling medium, wherein the motor and the speed reducer unit are provided in a row in an apparatus-axis direction such that the motor shaft and the speed reducer output shaft are arranged along the same line, and the cooler is provided in a row with the speed reducer unit in the apparatus-axis direction in a state where at least a part of the cooler is immersed in the lubricating oil, so as to enable heat exchange with the lubricating oil.Type: GrantFiled: November 17, 2011Date of Patent: March 31, 2015Assignee: Kobelco Construction Machinery Co., Ltd.Inventors: Kenichi Terauchi, Masatsugu Hamasaki
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Publication number: 20130231210Abstract: A drive apparatus for a construction machine includes: a motor having a motor shaft; a speed reducer unit having a speed reducer output shaft and a casing and reducing speed of rotation force of the motor, and transmitting the force to an upper slewing body; and a cooler formed with a coolant path through which liquid or gas for cooling lubricating oil inside the casing passes as a cooling medium, wherein the motor and the speed reducer unit are provided in a row in an apparatus-axis direction such that the motor shaft and the speed reducer output shaft are arranged along the same line, and the cooler is provided in a row with the speed reducer unit in the apparatus-axis direction in a state where at least a part of the cooler is immersed in the lubricating oil, so as to enable heat exchange with the lubricating oil.Type: ApplicationFiled: November 17, 2011Publication date: September 5, 2013Applicant: KOBELCO CONSTRUCTION MACHINERY CO., LTDInventors: Kenichi Terauchi, Masatsugu Hamasaki