Patents by Inventor Katsuhito FUJII
Katsuhito FUJII 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).
-
Patent number: 9960713Abstract: An impact producing actuator can vary energy to be applied to a shape memory alloy, depending on, for example, an ambient temperature. The impact producing actuator has a drive signal generation unit that generates a drive signal based on a single pulse signal generated in response to an input operation and outputs the drive signal, a switching element whose switching operation is controlled by the drive signal, and a shape memory alloy through which electric current passes for a period of time during which the switching element is turned on or off. The impact producing actuator is configured such that the period of time during which the switching element is turned on or off varies depending on the ambient temperature.Type: GrantFiled: October 5, 2015Date of Patent: May 1, 2018Assignee: SMK CorporationInventors: Yuki Akita, Yoshinori Watanabe, Katsuhito Fujii, Takeshi Matsuda
-
Patent number: 9909572Abstract: A drive device includes: a base member having, on a surface, an operation base part made up of one or more operation recesses; and a movable member disposed to be opposed to the base member and having, on the opposing surface, operation projections to be inserted into the operation recesses. A shape memory alloy member is interposed between the base member and the movable member, and the movable member is moved so as to be separated away from the base member in response to the contraction of the shape memory alloy member when energized. The drive device includes a spring which is supported by the base member and bias the movable member so as to be separated away from the base member.Type: GrantFiled: June 19, 2015Date of Patent: March 6, 2018Assignee: SMK CorporationInventors: Katsuhito Fujii, Takeshi Matsuda, Yoshinori Watanabe, Yuki Akita
-
Patent number: 9857875Abstract: A vibration generation apparatus includes a holder including a receiver disposed with a distance from a vibration target component on the outside thereof, an actuator supported by the receiver and configured to push out one side surface of the vibration target component, and a biasing unit supported by the receiver and configured to bias the other side surface of the vibration target component in a pushing-back direction. The biasing unit includes one or more insulating elastic members opening at both ends thereof and formed in a tubular shape, and the elastic members are interposed between the receiver and the vibration target component side surface in the state in which the elastic members are compressed in a tube diameter direction.Type: GrantFiled: December 8, 2015Date of Patent: January 2, 2018Assignee: SMK CorporationInventors: Katsuhito Fujii, Takeshi Matsuda, Yoshinori Watanabe, Yuki Akita
-
Patent number: 9732737Abstract: A drive unit includes a base member having an operation base having operation recesses in a front surface, a movable member that is disposed to be opposite to the base member and has operation projections to be inserted into the operation recesses in an opposed surface, and a shape memory alloy member that is disposed between the base member and the movable member and shrinks by heat generated by passing an electric current. In conjunction with the shrinkage of the shape memory alloy member by the passage of the electric current, the movable member is moved in a direction away from the base member. The base member has a fixed portion in its middle in a core axial direction of the shape memory alloy member, to fix the middle on a support member.Type: GrantFiled: December 8, 2015Date of Patent: August 15, 2017Assignee: SMK CorporationInventors: Katsuhito Fujii, Takeshi Matsuda, Yoshinori Watanabe, Yuki Akita
-
Publication number: 20160259414Abstract: A vibration generation apparatus includes a holder including a receiver disposed with a distance from a vibration target component on the outside thereof, an actuator supported by the receiver and configured to push out one side surface of the vibration target component, and a biasing unit supported by the receiver and configured to bias the other side surface of the vibration target component in a pushing-back direction. The biasing unit includes one or more insulating elastic members opening at both ends thereof and formed in a tubular shape, and the elastic members are interposed between the receiver and the vibration target component side surface in the state in which the elastic members are compressed in a tube diameter direction.Type: ApplicationFiled: December 8, 2015Publication date: September 8, 2016Inventors: Katsuhito FUJII, Takeshi MATSUDA, Yoshinori WATANABE, Yuki AKITA
-
Publication number: 20160186730Abstract: Various operation feelings are provided in, for example, an impact actuator. The impact actuator includes a drive signal output unit for outputting a drive signal in which the voltage of a single pulse signal is changed with time, and a shape memory alloy through which an electric current is caused to pass in a period corresponding to the drive signal.Type: ApplicationFiled: December 16, 2015Publication date: June 30, 2016Inventors: Yoshinori WATANABE, Takeshi MATSUDA, Yuki AKITA, Katsuhito FUJII
-
Publication number: 20160102656Abstract: A drive unit includes a base member having an operation base having operation recesses in a front surface, a movable member that is disposed to be opposite to the base member and has operation projections to be inserted into the operation recesses in an opposed surface, and a shape memory alloy member that is disposed between the base member and the movable member and shrinks by heat generated by passing an electric current. In conjunction with the shrinkage of the shape memory alloy member by the passage of the electric current, the movable member is moved in a direction away from the base member. The base member has a fixed portion in its middle in a core axial direction of the shape memory alloy member, to fix the middle on a support member.Type: ApplicationFiled: December 8, 2015Publication date: April 14, 2016Inventors: Katsuhito FUJII, Takeshi MATSUDA, Yoshinori WATANABE, Yuki AKITA
-
Publication number: 20160028326Abstract: An impact producing actuator can vary energy to be applied to a shape memory alloy, depending on, for example, an ambient temperature. The impact producing actuator has a drive signal generation unit that generates a drive signal based on a single pulse signal generated in response to an input operation and outputs the drive signal, a switching element whose switching operation is controlled by the drive signal, and a shape memory alloy through which electric current passes for a period of time during which the switching element is turned on or off. The impact producing actuator is configured such that the period of time during which the switching element is turned on or off varies depending on the ambient temperature.Type: ApplicationFiled: October 5, 2015Publication date: January 28, 2016Inventors: Yuki AKITA, Yoshinori WATANABE, Katsuhito FUJII, Takeshi MATSUDA
-
Publication number: 20150369222Abstract: A drive device includes: a base member having, on a surface, an operation base part made up of one or more operation recesses; and a movable member disposed to be opposed to the base member and having, on the opposing surface, operation projections to be inserted into the operation recesses. A shape memory alloy member is interposed between the base member and the movable member, and the movable member is moved so as to be separated away from the base member in response to the contraction of the shape memory alloy member when energized. The drive device includes a spring which is supported by the base member and bias the movable member so as to be separated away from the base member.Type: ApplicationFiled: June 19, 2015Publication date: December 24, 2015Inventors: Katsuhito FUJII, Takeshi MATSUDA, Yoshinori WATANABE, Yuki AKITA
-
Patent number: D784306Type: GrantFiled: September 16, 2014Date of Patent: April 18, 2017Assignee: SMK CorporationInventors: Katsuhito Fujii, Takeshi Matsuda, Yoshinori Watanabe, Yuki Akita
-
Patent number: D821982Type: GrantFiled: March 27, 2017Date of Patent: July 3, 2018Assignee: SMK CorporationInventors: Katsuhito Fujii, Takeshi Matsuda, Yoshinori Watanabe, Yuki Akita