Patents by Inventor Jeff Duvall

Jeff Duvall 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).

  • Elevator safety clamping jaw
    Patent number: 10071882
    Abstract: A safety clamping jaw includes at least one lever arm, a wedge member provided on a first end of each lever arm, a roller provided on a second end of each lever arm, a cam member provided between the rollers, and a resilient member bearing against the cam member. Upon activation of the clamping jaw, each roller may push the cam member in a direction towards the resilient member, thereby compressing the resilient member.
    Type: Grant
    Filed: November 19, 2014
    Date of Patent: September 11, 2018
    Assignees: ThyssenKrupp AG, ThyssenKrupp Elevator AG
    Inventor: Jeff Duvall
  • Elevator Safety Clamping Jaw
    Publication number: 20160137456
    Abstract: A safety clamping jaw includes at least one lever arm, a wedge member provided on a first end of each lever arm, a roller provided on a second end of each lever arm, a cam member provided between the rollers, and a resilient member bearing against the cam member. Upon activation of the clamping jaw, each roller may push the cam member in a direction towards the resilient member, thereby compressing the resilient member.
    Type: Application
    Filed: November 19, 2014
    Publication date: May 19, 2016
    Inventor: Jeff Duvall
  • Elevator Apparatus Yielding No Reverse Rope Bend
    Publication number: 20110132695
    Abstract: Provided is an elevator apparatus that may be mounted horizontally in an upper portion of an elevator hoistway. Such an elevator apparatus may comprise a drive machine, a deflector sheave, a support frame, and a roping system. The roping system may be configured to eliminate reverse rope bend to improve the rope life of the system.
    Type: Application
    Filed: December 9, 2010
    Publication date: June 9, 2011
    Applicant: ThyssenKrupp Elevator Capital Corporation
    Inventors: Amer Aziz, Dustin Bobbit, Gary Hooper, Donnie Bacak, Jeff Duvall