Patents by Inventor Masanori Yokoyama

Masanori Yokoyama 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).

  • Publication number: 20180283496
    Abstract: Provided are a chain component that has a simple surface treatment structure and can maintain favorable wear resistance over a long time, and a chain that includes this chain component and maintains favorable wear elongation resistance. The chain component of a power transmission chain for industrial use includes a chromium nitride layer containing more than 0 mass % but not more than 55 mass % iron and formed on an outer side of a steel base material.
    Type: Application
    Filed: March 27, 2018
    Publication date: October 4, 2018
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Misa Asada, Takashi Kawata, Tomoaki Nakayasu, Kota Yoshimoto, Nobuhiro Uchida, Masanori Yokoyama
  • Patent number: 9739344
    Abstract: An object of the present invention is to provide a chain that reduces warping of connecting pins and prevents local wear in the bushings and connecting pins without causing an increase in the chain weight. Provided is a chain 10 including a plurality of inner links 20 formed by inner plates 30 and bushings 40, and a plurality of outer links 50 formed by outer plates 60 and connecting pins 70, wherein the plate height of each of the inner plates 30 as measured along an imaginary line L1 passing through the center of a bushing hole 31 and extending in a chain height direction is larger than a chain pitch P.
    Type: Grant
    Filed: September 10, 2015
    Date of Patent: August 22, 2017
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Patent number: 9534662
    Abstract: An object of the present invention is to provide a chain that employs simple structures so as to establish contact surface pressures in accordance with various conditions of use, for the purpose of reducing frictional loss and preventing wear or damage to a chain guide member, as well as reducing order-related noise. The chain 100 is formed by inner links 101 and outer links 102 alternately and pivotably coupled together in a longitudinal direction of the chain. The plurality of inner plates 110 include an asymmetrical inner plate 110x having different edge shapes on upper and lower sides in a height direction of the chain.
    Type: Grant
    Filed: October 20, 2015
    Date of Patent: January 3, 2017
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Patent number: 9506537
    Abstract: A chain transmission is provided which is capable of reducing friction loss in the transmission of power without the risk of compromising the durability of a chain guide mechanism and the chain. The chain transmission includes a chain and a chain guide mechanism. The chain guide mechanism includes a first guide and a second guide having a smaller radius of curvature than that of the first guide. The plurality of plates include a first plate and a second plate. The first plate has a backside height set such that the first plate does not contact the first guide when the first plate is guided by the first guide and such that the first plate contacts the second guide when the first plate is guided by the second guide.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: November 29, 2016
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Yuji Kurematsu, Masanori Yokoyama
  • Patent number: 9500271
    Abstract: Provided are a sprocket and a chain transmission mechanism configured such that noise and vibrations caused by the elongation of the chain and also wear of parts are reduced, the decrease in the meshing strength of the chain and the sprocket is inhibited, and the chain service life is extended. The sprocket and chain transmission mechanism each have bottom land portion arcs of a predetermined radius and a predetermined angular range between a plurality of teeth to be meshed with the chain. The radius of each of the bottom land portion arcs satisfies the following relationship with the diameter of a roller or a bush of the meshing chain: Rb>0.505*?r+0.069*?r1/3 (where Rb is the bottom land portion arc radius, and ?r is the diameter of the roller or the bush of the meshing chain).
    Type: Grant
    Filed: February 11, 2015
    Date of Patent: November 22, 2016
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventors: Masanori Yokoyama, Tsuyoshi Kabai
  • Publication number: 20160116022
    Abstract: An object of the present invention is to provide a chain that employs simple structures so as to establish contact surface pressures in accordance with various conditions of use, for the purpose of reducing frictional loss and preventing wear or damage to a chain guide member, as well as reducing order-related noise. The chain 100 is formed by inner links 101 and outer links 102 alternately and pivotably coupled together in a longitudinal direction of the chain. The plurality of inner plates 110 include an asymmetrical inner plate 110x having different edge shapes on upper and lower sides in a height direction of the chain.
    Type: Application
    Filed: October 20, 2015
    Publication date: April 28, 2016
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20160108990
    Abstract: An object of the present invention is to provide a chain that reduces warping of connecting pins and prevents local wear in the bushings and connecting pins without causing an increase in the chain weight. Provided is a chain 10 including a plurality of inner links 20 formed by inner plates 30 and bushings 40, and a plurality of outer links 50 formed by outer plates 60 and connecting pins 70, wherein the plate height of each of the inner plates 30 as measured along an imaginary line L1 passing through the center of a bushing hole 31 and extending in a chain height direction is larger than a chain pitch P.
    Type: Application
    Filed: September 10, 2015
    Publication date: April 21, 2016
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Patent number: 9243684
    Abstract: A chain is provided, whose strength is increased and whose power loss is reduced as a result of reduced friction resistance between link units and link plates. A pair of link plates 160 are pivotally coupled to a link unit 101 in the chain 100. A pair of connecting pin portions 110 and a pair of plate portions 140 are inseparably joined at joint parts 150 to form one link unit 101. A stopper portion 123 is provided to the connecting pin portion 110 between a plate portion 140 and a link plate 160 adjacent each other in the width direction to restrict the link plate 160 from coming closer to the plate portion 140.
    Type: Grant
    Filed: November 14, 2013
    Date of Patent: January 26, 2016
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Patent number: 9202599
    Abstract: Provided are an operation support device and an operation support method for a nuclear power plant which are capable of accurately grasping the condition of a nuclear power plant and capable of offering support for instantly performing a predetermined operation by an operator when an unusual situation occurs. The operation support device for a nuclear power plant is provided with an operation state check display unit (20) for displaying whether or not a system or equipment necessary for a safe operation of the entire nuclear power plant operates on the basis of a command signal to the system or equipment and a bypass and operation impossibility state display unit (21) for displaying whether the system or equipment is operable or not.
    Type: Grant
    Filed: October 25, 2010
    Date of Patent: December 1, 2015
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masanori Yokoyama, Koji Ito
  • Patent number: 9182010
    Abstract: Provided are a chain and a connecting pin that enable reduction in the number of components and the workload involved in chain assembly, and that enhances the strength of a connecting pin. A chain 100 has inner plates 110, outer plates 120 and connecting pins 130. Each connecting pin 130 has a pair of outer shaft sections 131 formed on both end sides of the pin and fixed into pin holes 121 of the outer plates 120; a pair of inner shaft sections 132 formed inward of the pair of outer shaft sections 131 in the pin longitudinal direction and freely fitted into pin holes 111 of the inner plates 110; and a movement restricting section 133 formed inward of the left-right pair of inner shaft sections 132 in the pin longitudinal direction and restricting the movement of the inner plates 110 in the chain width inward direction.
    Type: Grant
    Filed: May 22, 2014
    Date of Patent: November 10, 2015
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20150240932
    Abstract: Provided are a sprocket and a chain transmission mechanism configured such that noise and vibrations caused by the elongation of the chain and also wear of parts are reduced, the decrease in the meshing strength of the chain and the sprocket is inhibited, and the chain service life is extended. The sprocket and chain transmission mechanism each have bottom land portion arcs of a predetermined radius and a predetermined angular range between a plurality of teeth to be meshed with the chain. The radius of each of the bottom land portion arcs satisfies the following relationship with the diameter of a roller or a bush of the meshing chain: Rb>0.505*?r+0.069*?r1/3 (where Rb is the bottom land portion arc radius, and ?r is the diameter of the roller or the bush of the meshing chain).
    Type: Application
    Filed: February 11, 2015
    Publication date: August 27, 2015
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Masanori Yokoyama, Tsuyoshi Kabai
  • Patent number: 9046151
    Abstract: Inner links of a chain are formed as an integral link unit, each having a pair of connecting pin portions and a pair of plate portions coupling the pair of connecting pin portions, so as to have higher strength and improved durability, whereby the cost of the chain is reduced because of the ease of assembly and a reduction in the number of components. The chain is formed by coupling together link units and pairs of link plates alternately and pivotally in a longitudinal direction of the chain. The link unit is formed by inseparably joining a pair of connecting pin portions and a pair of plate portions at joint parts.
    Type: Grant
    Filed: July 22, 2013
    Date of Patent: June 2, 2015
    Assignee: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20150049851
    Abstract: A central control device of a nuclear power plant monitors and controls the nuclear power plant. The central control device includes monitoring operation devices (for example, an alarm VDU, a common system VDU, and a safety system VDU of an operation console) each having both a function as a display unit that displays information on the nuclear power plant (for example, operation information, safety information, and the like) and a function as an operation unit that operates the nuclear power plant, and a control unit that controls these monitoring operation devices. The control unit selects an operation procedure document corresponding to an input operation to a monitoring operation device and displays the operation procedure document on the monitoring operation device.
    Type: Application
    Filed: March 18, 2013
    Publication date: February 19, 2015
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventor: Masanori Yokoyama
  • Publication number: 20140357440
    Abstract: Provided are a chain and a connecting pin that enable reduction in the number of components and the workload involved in chain assembly, and that enhances the strength of a connecting pin. A chain 100 has inner plates 110, outer plates 120 and connecting pins 130. Each connecting pin 130 has a pair of outer shaft sections 131 formed on both end sides of the pin and fixed into pin holes 121 of the outer plates 120; a pair of inner shaft sections 132 formed inward of the pair of outer shaft sections 131 in the pin longitudinal direction and freely fitted into pin holes 111 of the inner plates 110; and a movement restricting section 133 formed inward of the left-right pair of inner shaft sections 132 in the pin longitudinal direction and restricting the movement of the inner plates 110 in the chain width inward direction.
    Type: Application
    Filed: May 22, 2014
    Publication date: December 4, 2014
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20140323255
    Abstract: A chain transmission is provided which is capable of reducing friction loss in the transmission of power without the risk of compromising the durability of a chain guide mechanism and the chain. The chain transmission includes a chain and a chain guide mechanism. The chain guide mechanism includes a first guide and a second guide having a smaller radius of curvature than that of the first guide. The plurality of plates include a first plate and a second plate. The first plate has a backside height set such that the first plate does not contact the first guide when the first plate is guided by the first guide and such that the first plate contacts the second guide when the first plate is guided by the second guide.
    Type: Application
    Filed: April 15, 2014
    Publication date: October 30, 2014
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventors: Yuji Kurematsu, Masanori Yokoyama
  • Patent number: 8771117
    Abstract: In a power transmission utilizing a bushingless roller chain, the inner links of the chain have chain guide-contacting backs that have a convex arcuate shape, and the outer links are shaped so that they do not contact the chain guides. The rollers are wider than the sprocket teeth that they engage, and widthwise gaps between the ends of the rollers and the outer link plates allow the inner link plates to move in the widthwise direction. The gap between the inner surfaces of the rollers and the outer surfaces of the connecting pins of the chain is larger than the gap between the inner surfaces of the holes in the inner link plates and the outer surfaces of the connecting pins that extend through them.
    Type: Grant
    Filed: July 27, 2012
    Date of Patent: July 8, 2014
    Assignee: Tsubakimoto Chain Co.
    Inventor: Masanori Yokoyama
  • Publication number: 20140141913
    Abstract: A chain is provided, whose strength is increased and whose power loss is reduced as a result of reduced friction resistance between link units and link plates. A pair of link plates 160 are pivotally coupled to a link unit 101 in the chain 100. A pair of connecting pin portions 110 and a pair of plate portions 140 are inseparably joined at joint parts 150 to form one link unit 101. A stopper portion 123 is provided to the connecting pin portion 110 between a plate portion 140 and a link plate 160 adjacent each other in the width direction to restrict the link plate 160 from coming closer to the plate portion 140.
    Type: Application
    Filed: November 14, 2013
    Publication date: May 22, 2014
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20140057750
    Abstract: Inner links of a chain are formed as an integral link unit, each having a pair of connecting pin portions and a pair of plate portions coupling the pair of connecting pin portions, so as to have higher strength and improved durability, whereby the cost of the chain is reduced because of the ease of assembly and a reduction in the number of components. The chain is formed by coupling together link units and pairs of link plates alternately and pivotally in a longitudinal direction of the chain. The link unit is formed by inseparably joining a pair of connecting pin portions and a pair of plate portions at joint parts.
    Type: Application
    Filed: July 22, 2013
    Publication date: February 27, 2014
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20130053194
    Abstract: In a power transmission utilizing a bushingless roller chain, the inner links of the chain have chain guide-contacting backs that have a convex arcuate shape, and the outer links are shaped so that they do not contact the chain guides. The rollers are wider than the sprocket teeth that they engage, and widthwise gaps between the ends of the rollers and the outer link plates allow the inner link plates to move in the widthwise direction. The gap between the inner surfaces of the rollers and the outer surfaces of the connecting pins of the chain is larger than the gap between the inner surfaces of the holes in the inner link plates and the outer surfaces of the connecting pins that extend through them.
    Type: Application
    Filed: July 27, 2012
    Publication date: February 28, 2013
    Applicant: TSUBAKIMOTO CHAIN CO.
    Inventor: Masanori Yokoyama
  • Publication number: 20120121055
    Abstract: Provided are an operation support device and an operation support method for a nuclear power plant which are capable of accurately grasping the condition of a nuclear power plant and capable of offering support for instantly performing a predetermined operation by an operator when an unusual situation occurs. The operation support device for a nuclear power plant is provided with an operation state check display unit (20) for displaying whether or not a system or equipment necessary for a safe operation of the entire nuclear power plant operates on the basis of a command signal to the system or equipment and a bypass and operation impossibility state display unit (21) for displaying whether the system or equipment is operable or not.
    Type: Application
    Filed: October 25, 2010
    Publication date: May 17, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Masanori Yokoyama, Koji Ito