Patents by Inventor Robin C. S. Chang
Robin C. S. Chang 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: 20180106297Abstract: A coupling apparatus includes a bellows, two rings and two axle-connecting elements. The bellows includes two ends and two rolled edges each formed at a corresponding one of the ends. Each of the rings is connected to a corresponding one of the ends of bellows. Each of the axle-connecting elements is connected to a corresponding one of the rings.Type: ApplicationFiled: October 17, 2016Publication date: April 19, 2018Inventor: Robin C.S. Chang
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Publication number: 20170284474Abstract: A coupler is provided for a power-take-out axle of a gearbox. The coupler includes a coupling flange, a pinion, and a threaded bolt. The coupling flange includes a screw hole and the first curvic coupling member that are arranged in a concentric manner. The pinion is connected to a front end of the coupling flange, and includes a countersink hole, teeth and a second curvic coupling member arranged in concentric manner. The threaded bolt is inserted in the screw hole from the front end of the pinion through the countersink hole. Hence, the pinion and the coupling flange are bonded.Type: ApplicationFiled: April 1, 2016Publication date: October 5, 2017Inventor: Robin C.S. CHANG
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Publication number: 20160223065Abstract: A rack includes a base and a toothed portion. The base includes two lateral faces. The toothed portion extends on the base and includes two lateral faces each extending from a corresponding one of the lateral faces of the base at an angle. Thus, there is a fold line extending between each of the lateral faces of the toothed portion and the corresponding one of the lateral faces of the base.Type: ApplicationFiled: February 2, 2015Publication date: August 4, 2016Inventor: Robin C.S. Chang
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Publication number: 20110244968Abstract: A flexible coupler includes an active element, a passive element and a flexible metal tube extending between the active and passive elements. The active element includes an internal side. The passive element includes an internal side. The flexible metal tube includes first and second annular end faces. Adhesive is provided between the internal side of the active element and the first annular face of the flexible metal tube. More adhesive is provided between the internal side of the passive element and the second annular face of the flexible metal tube.Type: ApplicationFiled: March 30, 2010Publication date: October 6, 2011Inventor: Robin C.S. Chang
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Publication number: 20110172053Abstract: A planet-gear speed reducer includes a shell, a planet gear set, a sun gear set, two semi-bearings, and a bearing. The shell includes a toothed strip, a first smooth strip and a second smooth strip formed on an internal side. The planet gear set includes a carrier located within the shell and planet gears carried on the carrier. The sun gear set is engaged with the planet gears. The first semi-bearing includes an internal ring provided around a section of the carrier, rollers and a cage for positioning the rollers between the internal ring thereof and the first smooth strip of the shell. The second semi-bearing includes an internal ring provided around another section of the carrier, rollers and a cage for positioning the rollers between the internal ring thereof and the second smooth strip of the shell.Type: ApplicationFiled: January 13, 2010Publication date: July 14, 2011Inventor: Robin C.S. Chang
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Publication number: 20100173742Abstract: An epicyclic gearbox includes a shell, a sun gear assembly and a planet gear assembly. The shell is in the form of a drum formed with plain teeth on an internal side. The sun gear assembly for operative connection to a motor, the sun gear assembly includes a sun gear formed with bevel teeth. The planet gear assembly includes a spider for operative connection to a passive device. The planet gears are supported on the spider. Each planet gear includes plain teeth for engagement with the plain teeth of the shell and bevel teeth for engagement with the bevel teeth of the sun gear.Type: ApplicationFiled: January 8, 2009Publication date: July 8, 2010Inventor: Robin C.S. Chang
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Patent number: 7294090Abstract: A planetary gear device includes a housing having a chamber for receiving lubricating member and having an internal gear, a carrier rotatably received in the chamber of the housing and having an output shaft and having a number of openings for rotatably receiving planet pinions. The planet pinions are engaged with the internal gear of the housing, and each includes a bore for receiving an axle, and a number of rollers received between the planet pinion and the axle to act as a bearing device for smoothly attaching the planet pinions on the axles. The planet pinions each has one or two side portions each having one or more slots for filling the lubricating member into the bore of the planet pinion.Type: GrantFiled: October 4, 2005Date of Patent: November 13, 2007Assignee: Apex Dynamics, Inc.Inventor: Robin C. S. Chang
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Patent number: 6869381Abstract: In a gearbox device, a housing is formed with a hole-confining wall portion. A shaft is mounted rotatably in the hole-confining wall portions. An oil seal unit is mounted in the housing to provide a liquid tight seal between the shaft and the hole-confining wall portion. The oil seal unit includes an annular rubber seal member and an annular ceramic member. The ceramic member is disposed radially and inwardly of the rubber seal member and is in contact with the rubber seal member. The ceramic member disposed in the rubber seal member is sleeved on and is fixed to the shaft. The rubber seal member disposed outwardly of the ceramic member is fixed to the hole-confining wall portion.Type: GrantFiled: May 23, 2003Date of Patent: March 22, 2005Assignee: Apex Dynamics Inc.Inventor: Robin C. S. Chang
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Publication number: 20040235609Abstract: In a gearbox device, a housing is formed with a hole-confining wall portion. A shaft is mounted rotatably in the hole-confining wall portions. An oil seal unit is mounted in the housing to provide a liquid tight seal between the shaft and the hole-confining wall portion. The oil seal unit includes an annular rubber seal member and an annular ceramic member. The ceramic member is disposed radially and inwardly of the rubber seal member and is in contact with the rubber seal member. The ceramic member disposed in the rubber seal member is sleeved on and is fixed to the shaft. The rubber seal member disposed outwardly of the ceramic member is fixed to the hole-confining wall portion.Type: ApplicationFiled: May 23, 2003Publication date: November 25, 2004Applicant: APEX DYNAMICS, INC.Inventor: Robin C. S. Chang
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Patent number: 6503168Abstract: A planetary gear device includes a bearing member mounted on an inner coupling annular wall surface of a planet carrier to support rotatably a force transmitting member relative to the planet carrier in an accommodating chamber of a mounting frame. A sun wheel member of the force transmitting member meshes with a plurality of planet wheel members which mesh in turn with an inner annular toothed portion of the mounting frame so as to reduce speed of an output shaft of a motor that is coupled with a tubular coupling portion of the force transmitting member. With such an arrangement, accurate alignment of the sun wheel member with the planet carrier can be maintained.Type: GrantFiled: June 12, 2001Date of Patent: January 7, 2003Assignee: Apex Dynamics, Inc.Inventor: Robin C. S. Chang
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Publication number: 20020187875Abstract: A planetary gear device includes a bearing member mounted on an inner coupling annular wall surface of a planet carrier to support rotatably a force transmitting member relative to the planet carrier in an accommodating chamber of a mounting frame. A sun wheel member of the force transmitting member meshes with a plurality of planet wheel members which mesh in turn with an inner annular toothed portion of the mounting frame so as to reduce speed of an output shaft of a motor that is coupled with a tubular coupling portion of the force transmitting member. With such an arrangement, accurate alignment of the sun wheel member with the planet carrier can be maintained.Type: ApplicationFiled: June 12, 2001Publication date: December 12, 2002Inventor: Robin C.S. Chang
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Patent number: D821120Type: GrantFiled: May 26, 2017Date of Patent: June 26, 2018Assignee: Apex Dynamics, Inc.Inventor: Robin C. S. Chang
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Patent number: D869529Type: GrantFiled: February 11, 2018Date of Patent: December 10, 2019Assignee: APEX DYNAMICS, INCInventor: Robin C. S. Chang
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Patent number: D869530Type: GrantFiled: February 11, 2018Date of Patent: December 10, 2019Assignee: APEX DYNAMICS, INCInventor: Robin C. S. Chang
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Patent number: D879171Type: GrantFiled: February 11, 2018Date of Patent: March 24, 2020Assignee: APEX DYNAMICS, INCInventor: Robin C. S. Chang