Patents by Inventor Takafumi Murakami

Takafumi Murakami 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: 20080025352
    Abstract: A laser apparatus including a laser oscillating section, electric power source, a laser-power measuring section and a power-source controlling section. The power-source controlling section includes a power-supply instructing section instructing the power source to perform an electric-power supplying operation for the laser oscillating section in response to a laser-oscillation command value; and a function calculating section determining, based on different laser-oscillation command values given to the power-supply instructing section and different laser-power measured values obtained by the laser-power measuring section, a function approximatively representing a correlation of the laser-power measured values relative to the laser-oscillation command values.
    Type: Application
    Filed: July 20, 2007
    Publication date: January 31, 2008
    Applicant: FANUC LTD
    Inventors: Akira EGAWA, Takafumi MURAKAMI, Akihiko NISHIO
  • Publication number: 20080013585
    Abstract: A gas laser oscillating unit having a gas junction part where gas flow may be stable, whereby a stable laser beam output and/or a laser beam that does not fluctuate very much may be achieved. The laser gas, flowing through first and second excitation parts, is introduced into the first and second tapered gas flow passages. After that, the two gas flows are mixed at or near the center point of a gas junction part and the mixed gas flows in a next flow passage. Then, one of the gas flows from the first excitation part is biased toward the ?X direction by a first biasing member arranged in the first gas flow passage, and the other gas flow from the second excitation part is biased toward the +X direction by a second biasing member arranged in the second gas flow passage.
    Type: Application
    Filed: June 29, 2007
    Publication date: January 17, 2008
    Applicant: FANUC LTD
    Inventors: Akira EGAWA, Takafumi MURAKAMI, Akihiko NISHIO
  • Publication number: 20070030875
    Abstract: A laser processing device (100) includes a laser oscillator (2), a laser machine (11) and a control means (1) for controlling the laser oscillator and the laser machine. The control means includes a storage means (50) for storing the processing program (60) for the work to be processed. The storage means has stored therein a required laser gas pressure value (72) for the laser oscillator in the laser processing operation, which value is determined in accordance with the processing specifics the work (20). The control means includes a laser gas pressure command transmission means (52) for transmitting a laser gas pressure command based on the required laser gas pressure value to the laser oscillator. This further improves the processing performance of the laser processing apparatus. Further, the control means may include a required laser gas pressure value adjusting means (55) for adjusting the required laser gas pressure value.
    Type: Application
    Filed: July 21, 2006
    Publication date: February 8, 2007
    Inventors: Tetsuhisa TAKAZANE, Takafumi MURAKAMI, Michinori MAEDA, Ryoma OKAZAKI, Akira EGAWA
  • Publication number: 20060283678
    Abstract: A dynamic damper has a main body, two mass portions projecting from the main body in diametrical directions of a drive shaft, and two connecting portions connecting the main body and the respective mass portions to each other. The connecting portions are narrower than the mass portions. The mass portions accommodate mass members therein, respectively. Each of the mass members comprises a sintered body produced by sintering a powder of a tungsten alloy or tungsten mixed with a metal binder. The tungsten alloy may be W-1.8Ni-1.2Cu, W-3.0Ni-2.0Cu, W-5.0Ni-2.0Fe, or W-3.5Ni-1.5Fe.
    Type: Application
    Filed: June 14, 2006
    Publication date: December 21, 2006
    Inventor: Takafumi Murakami
  • Publication number: 20060274806
    Abstract: A gas laser apparatus including a laser oscillating section including a medium circuit allowing a medium gas to flow therethrough under pressure, and a gas-composition adjusting section for adjusting the composition of the medium gas flowing through the medium circuit of the laser oscillating section.
    Type: Application
    Filed: May 31, 2006
    Publication date: December 7, 2006
    Inventors: Takanori Sato, Takafumi Murakami, Akira Egawa
  • Publication number: 20060159152
    Abstract: A laser oscillator capable of restraining the generation of a diffracted beam so as to obtain a laser beam with high power and high quality. The laser oscillator has an output mirror, a rear mirror and first and second concave mirrors. These mirrors cooperate together so as to form a laser beam profile. First and second beam waists are formed in the laser beam profile, between the output mirror and the first concave mirror and between the second concave mirror and the rear mirror, respectively. The laser oscillator includes a first aperture positioned generally in the middle of an optical path between the output mirror and the first beam waist and a second aperture positioned generally in the middle of the optical path between the first beam waist and the first concave mirror.
    Type: Application
    Filed: January 17, 2006
    Publication date: July 20, 2006
    Inventors: Tetsuhisa Takazane, Takafumi Murakami, Michinori Maeda, Akira Egawa
  • Patent number: 5608754
    Abstract: A laser resonator allows internal optical mirrors to be cleaned easily and minimizes any contamination of the internal optical mirrors. The laser resonator has normally closed cleaning windows disposed immediately in front of output, rear, and folding mirrors for inserting a cleaning instrument therethrough for cleaning these mirrors. A gas inlet discharge tube holder has a discharge tube coupling which interconnects the spaces in parallel discharge tubes for transmitting a laser beam therethrough. The gas inlet discharge tube holder also has a gas flow bypass for bypassing a laser gas that circulates through the discharge tubes. The internal optical mirrors can be cleaned easily with a cleaning instrument inserted through the cleaning windows. As the internal optical mirrors do not need to be removed for cleaning, they and an external optical system are not required to be readjusted for alignment of their optical axes.
    Type: Grant
    Filed: October 5, 1995
    Date of Patent: March 4, 1997
    Assignee: Fanuc Ltd.
    Inventors: Takafumi Murakami, Yasuyuki Morita, Norio Karube
  • Patent number: 5043072
    Abstract: Dsiclosed is a method of treating fluoride-containing water, which comprises a reaction step where a calcium compound and/or an aluminium compound are/is added to fluoride-containing water while the pH value of the resulting suspended liquid is adjusted to fall within the range of from 6 to 8, and at least a part of the concentrated suspension to be formed in the membrane-separation step of the following stage is added to the suspended liquid and stirred and the resulting suspension is introduced into the circulation tank; a membrane-separation step where the suspension from the circulation tank is treated by membrane-separation to separate it into a permeated solution and a concentrated suspension; a circulation step where at least a part of the concentrated suspension to be taken out from the membrane-separation step is returned back to the reaction step while the remaining part thereof is circulated to the circulation tank; and a step where the permeated solution is taken out from the membrane-separation s
    Type: Grant
    Filed: September 24, 1990
    Date of Patent: August 27, 1991
    Assignee: Kurita Water Industries Ltd.
    Inventors: Naoto Hitotsuyanagi, Takafumi Murakami, Isamu Katoh