Patents by Inventor David Umstadt

David Umstadt 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).

  • Adjustable damping arrangement for a non-rotating tool holder
    Patent number: 10920848
    Abstract: A damper assembly for use with a non-rotating tool holder includes a hollow ram for supporting a non-rotating tool and a damper assembly mounted in the hollow ram for absorbing vibrations of the ram. The damper assembly includes a front plate and a rear plate, an upper tie rod and a lower tie rod extending between the front plate and the rear plate, and a damper mass mounted between the front plate and the rear plate. Ring dampers are mounted between the damper mass and the front and rear plates, and suspension springs are mounted between the upper tie rod and the lower tie rod. The suspension springs carry the weight of the damper mass so that the ring dampers do not have to carry the weight of the damper mass, and the damper mass is free to respond to vibrations in the ram.
    Type: Grant
    Filed: July 9, 2019
    Date of Patent: February 16, 2021
    Assignee: FIVES GIDDINGS & LEWIS, LLC
    Inventor: David Umstadt
  • ADJUSTABLE DAMPING ARRANGEMENT FOR A NON-ROTATING TOOL HOLDER
    Publication number: 20190331194
    Abstract: A damper assembly for use with a non-rotating tool holder includes a hollow ram for supporting a non-rotating tool and a damper assembly mounted in the hollow ram for absorbing vibrations of the ram. The damper assembly includes a front plate and a rear plate, an upper tie rod and a lower tie rod extending between the front plate and the rear plate, and a damper mass mounted between the front plate and the rear plate. Ring dampers are mounted between the damper mass and the front and rear plates, and suspension springs are mounted between the upper tie rod and the lower tie rod. The suspension springs carry the weight of the damper mass so that the ring dampers do not have to carry the weight of the damper mass, and the damper mass is free to respond to vibrations in the ram.
    Type: Application
    Filed: July 9, 2019
    Publication date: October 31, 2019
    Inventor: David Umstadt
  • Adjustable damping arrangement for a non-rotating tool holder
    Patent number: 10384267
    Abstract: A damper assembly for use with a non-rotating tool holder includes a hollow ram for supporting a non-rotating tool and a damper assembly mounted in the hollow ram for absorbing vibrations of the ram. The damper assembly includes a front plate and a rear plate, an upper tie rod and a lower tie rod extending between the front plate and the rear plate, and a damper mass mounted between the front plate and the rear plate. Ring dampers are mounted between the damper mass and the front and rear plates, and suspension springs are mounted between the upper tie rod and the lower tie rod. The suspension springs carry the weight of the damper mass so that the ring dampers do not have to carry the weight of the damper mass, and the damper mass is free to respond to vibrations in the ram.
    Type: Grant
    Filed: August 25, 2017
    Date of Patent: August 20, 2019
    Assignee: FIVES GIDDINGS & LEWIS, LLC
    Inventor: David Umstadt
  • ADJUSTABLE DAMPING ARRANGEMENT FOR A NON-ROTATING TOOL HOLDER
    Publication number: 20180093329
    Abstract: A damper assembly for use with a non-rotating tool holder includes a hollow ram for supporting a non-rotating tool and a damper assembly mounted in the hollow ram for absorbing vibrations of the ram. The damper assembly includes a front plate and a rear plate, an upper tie rod and a lower tie rod extending between the front plate and the rear plate, and a damper mass mounted between the front plate and the rear plate. Ring dampers are mounted between the damper mass and the front and rear plates, and suspension springs are mounted between the upper tie rod and the lower tie rod. The suspension springs carry the weight of the damper mass so that the ring dampers do not have to carry the weight of the damper mass, and the damper mass is free to respond to vibrations in the ram.
    Type: Application
    Filed: August 25, 2017
    Publication date: April 5, 2018
    Inventor: David Umstadt