Patents by Inventor Jonathan S. Dahm

Jonathan S. Dahm 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).

  • Short pulsewidth high pulse repetition frequency laser
    Patent number: 5848080
    Abstract: A laser with high average power, high repetition rate, ultra-short pulsewidth, and excellent beam quality is described. This is achieved by the use of high power diodes used to uniformly pump an improved Nd:YAlO.sub.3 crystal, resulting in a beam with excellent quality. In addition, a beta-barium borate (BBO) crystal, used in conjunction with drift step recovery diodes (DSRDs), forms a high speed optical switch which can be used to cavity dump the laser.
    Type: Grant
    Filed: May 12, 1997
    Date of Patent: December 8, 1998
    Inventor: Jonathan S. Dahm
  • Orbital head laser welder
    Patent number: 5563391
    Abstract: A laser welder is provided comprising a housing, an optical fiber, a wheel mounted within the housing and including a slot for receiving an article to be welded, the optical fiber mounted to and wound upon the wheel as the wheel is rotated to bring the fiber around the article, a sleeve for sealing to the article to establish a chamber surrounding the weld zone, the sleeve having a curved window for transmitting the laser light from the fiber to the weld zone, and a clip for removeably mounting the sleeve within the housing coaxial with the wheel. In another aspect, the invention provides the sealing sleeve for use in laser welding. The sleeve preferably includes a ring deformable with heat to clamp the sleeve to the article and center the article along an axis of the sleeve. In a further aspect, the invention relates to a method of welding articles.
    Type: Grant
    Filed: August 31, 1994
    Date of Patent: October 8, 1996
    Inventor: Jonathan S. Dahm
  • Orbital head laser welder
    Patent number: 5422456
    Abstract: A laser welder is provided comprising an optical fiber, a wheel including a slot for receiving an article to be welded, the optical fiber mounted to and wound upon the wheel as the wheel is rotated to bring the fiber around the article, and a sleeve for sealing to the article to establish a chamber surrounding the weld zone, the sleeve having a curved window for transmitting the laser light from the fiber to the weld zone. In another aspect, the invention provides the sealing sleeve for use in laser welding. The sleeve preferably includes a ring deformable to clamp the sleeve to the article and center the article along an axis of the sleeve. A pump is preferably also provided which removes oxygen from the weld zone chamber, so that pressurized inert gas can be introduced to reduce oxidation and vaporization. In a further aspect, the invention relates to a method of welding articles.
    Type: Grant
    Filed: August 31, 1993
    Date of Patent: June 6, 1995
    Inventor: Jonathan S. Dahm