Patents by Inventor Tadashi Fujinawa

Tadashi Fujinawa 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: 11440204
    Abstract: A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.
    Type: Grant
    Filed: June 18, 2018
    Date of Patent: September 13, 2022
    Assignee: DAIYA SEIKI CO., LTD.
    Inventors: Shunro Sugimoto, Tadashi Fujinawa, Yuji Oguchi
  • Publication number: 20210221010
    Abstract: A handling unit comprises: a collet integrally having a reference part, a plurality of elastic deformation parts connected to the tip side of the reference part, finger parts respectively connected to the tip sides of the elastic deformation parts, and a driven part that receives a driving force; a housing having a cylinder structure formed on the base end side or the outer circumferential side of the collet and provided with a fluid supply port and having a collet locking part that locks the collet at a locking position; and an operation body having a driving part that imparts a driving force to the driven part, a pressure reception part that receives the pressure of a fluid supplied from the fluid supply port, and a cylinder slide contact part that makes slide contact with the internal surface of the cylinder structure.
    Type: Application
    Filed: June 18, 2018
    Publication date: July 22, 2021
    Inventors: Shunro SUGIMOTO, Tadashi FUJINAWA, Yuji OGUCHI
  • Publication number: 20070001546
    Abstract: A control apparatus of an ultrasonic motor, comprises a driving wave number determining means for determining a driving wave number based on the targeted displacement of a driven object driven by the ultrasonic motor, a normative driving wave generating means for generating continuously normative driving waves in the number of times determined at the driving wave number determining means, inserted an interval determined based on the targeted velocity of the driven object, every at least one cycle of the normative driving waves, and a driving wave generating means for generating driving waves having the predetermined frequency and the predetermined amplitude based on the normative driving waves generated at the normative driving wave generating means.
    Type: Application
    Filed: May 4, 2006
    Publication date: January 4, 2007
    Inventor: Tadashi Fujinawa
  • Patent number: 7154209
    Abstract: A control apparatus of an ultrasonic motor, comprises a driving wave number determining means for determining a driving wave number based on the targeted displacement of a driven object driven by the ultrasonic motor, a normative driving wave generating means for generating continuously normative driving waves in the number of times determined at the driving wave number determining means, inserted an interval determined based on the targeted velocity of the driven object, every at least one cycle of the normative driving waves, and a driving wave generating means for generating driving waves having the predetermined frequency and the predetermined amplitude based on the normative driving waves generated at the normative driving wave generating means.
    Type: Grant
    Filed: December 16, 2003
    Date of Patent: December 26, 2006
    Assignee: Hephaist Seiko Co. Ltd
    Inventor: Tadashi Fujinawa
  • Publication number: 20060197410
    Abstract: A control apparatus of an ultrasonic motor, comprises a driving wave number determining means for determining a driving wave number based on the targeted displacement of a driven object driven by the ultrasonic motor, a normative driving wave generating means for generating continuously normative driving waves in the number of times determined at the driving wave number determining means, inserted an interval determined based on the targeted velocity of the driven object, every at least one cycle of the normative driving waves, and a driving wave generating means for generating driving waves having the predetermined frequency and the predetermined amplitude based on the normative driving waves generated at the normative driving wave generating means.
    Type: Application
    Filed: May 4, 2006
    Publication date: September 7, 2006
    Inventor: Tadashi Fujinawa
  • Patent number: 7043332
    Abstract: A numerically controlled lathe (10) includes a control unit (24) for controlling the operations of at least one spindle (14, 16) and at least one tool rest (18, 20) on a lathe bed (12) along a plurality of control axes in a plurality of lines.
    Type: Grant
    Filed: September 22, 2000
    Date of Patent: May 9, 2006
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Tadashi Fujinawa, Toshio Ishimura
  • Patent number: 6815917
    Abstract: A method for controlling an automatically operated lathe provided with at least one spindle and at least one tool rest includes the following steps. First, each of a plurality of transfer position data required in a sequence of machining programs in connection with at least one spindle and at least one tool rest is provided in a form of either one of two types of transfer position data, one of which is cam-reference data directing a transfer position as a function of a cam rotation quantity and the other is time-reference data directing a transfer position as a function of an elapsed time. Next, a time-series allocation of the cam-reference data and the time-reference data is designated in the sequence of machining programs. Then, the cam-reference data and the time-reference data are processed in accordance with the time-series allocation, so as to control a relative feed motion between at least one spindle and at least one tool rest in the sequence of machining programs.
    Type: Grant
    Filed: July 25, 2003
    Date of Patent: November 9, 2004
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Tadashi Fujinawa
  • Patent number: 6812664
    Abstract: A method for controlling an automatically operated lathe, provided with at least one spindle and at least one tool rest, includes the following steps. First, each of a plurality of transfer position data required in a sequence of machining programs in connection with at least one spindle and at least one tool rest is provided in a form of a cam-reference data directing a transfer position as a function of a cam rotation quantity. A plurality of pulse-train generating sources, each of which generates any pulse train, is also provided. Next, with regard to each of the plural transfer position data, a pulse-train generating source for generating a pulse train defining the cam rotation quantity as one component of the cam-reference data is designated, with the pulse-train generating source being selected from the plural pulse-train generating sources.
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: November 2, 2004
    Assignee: Citizen Watch Co., Ltd.
    Inventor: Tadashi Fujinawa
  • Publication number: 20040164646
    Abstract: A control apparatus of an ultrasonic motor, comprises a driving wave number determining means for determining a driving wave number based on the targeted displacement of a driven object driven by the ultrasonic motor, a normative driving wave generating means for generating continuously normative driving waves in the number of times determined at the driving wave number determining means, inserted an interval determined based on the targeted velocity of the driven object, every at least one cycle of the normative driving waves, and a driving wave generating means for generating driving waves having the predetermined frequency and the predetermined amplitude based on the normative driving waves generated at the normative driving wave generating means.
    Type: Application
    Filed: December 16, 2003
    Publication date: August 26, 2004
    Inventor: Tadashi Fujinawa
  • Publication number: 20040100218
    Abstract: A method for controlling an automatically operated lathe provided with at least one spindle and at least one tool rest includes the following steps. First, each of a plurality of transfer position data required in a sequence of machining programs in connection with at least one spindle and at least one tool rest is provided in a form of either one of two types of transfer position data, one of which is cam-reference data directing a transfer position as a function of a cam rotation quantity and the other is time-reference data directing a transfer position as a function of an elapsed time. Next, a time-series allocation of the cam-reference data and the time-reference data is designated in the sequence of machining programs. Then, the cam-reference data and the time-reference data are processed in accordance with the time-series allocation, so as to control a relative feed motion between at least one spindle and at least one tool rest in the sequence of machining programs.
    Type: Application
    Filed: July 25, 2003
    Publication date: May 27, 2004
    Inventor: Tadashi Fujinawa
  • Publication number: 20040056626
    Abstract: A method for controlling an automatically operated lathe, provided with at least one spindle and at least one tool rest, includes the following steps. First, each of a plurality of transfer position data required in a sequence of machining programs in connection with at least one spindle and at least one tool rest is provided in a form of a cam-reference data directing a transfer position as a function of a cam rotation quantity. A plurality of pulse-train generating sources, each of which generates any pulse train, is also provided. Next, with regard to each of the plural transfer position data, a pulse-train generating source for generating a pulse train defining the cam rotation quantity as one component of the cam-reference data is designated, with the pulse-train generating source being selected from the plural pulse-train generating sources.
    Type: Application
    Filed: July 29, 2003
    Publication date: March 25, 2004
    Inventor: Tadashi Fujinawa
  • Patent number: 6665579
    Abstract: Provided is a method of controlling a bar supplying apparatus capable of automatically setting a timing of opening a run-out preventing chuck, a timing of cutting a bar short, and a timing of replacing the bar by the minimum input work. A controller 115 of an NC lathe 110 extracts length data (1) of a product and dimensional data (s) of a cutting width from a machining program, calculates the position of a feeder 123 on the basis of those data, and controls supply of a bar W to bar supporting units 128a to 128c, opening/closing of run-out preventing chucks 129a to 129d, and feeding and replacement of the bar W on the basis of the position of the feeder 123.
    Type: Grant
    Filed: June 4, 2002
    Date of Patent: December 16, 2003
    Assignee: Citizen Watch Co., Ltd.
    Inventors: Yasuhiro Sasaki, Tadashi Fujinawa
  • Publication number: 20020183888
    Abstract: Provided is a method of controlling a bar supplying apparatus capable of automatically setting a timing of opening a run-out preventing chuck, a timing of cutting a bar short, and a timing of replacing the bar by the minimum input work.
    Type: Application
    Filed: June 4, 2002
    Publication date: December 5, 2002
    Inventors: Yasuhiro Sasaki, Tadashi Fujinawa