Patents by Inventor Doo Fai Yip

Doo Fai Yip 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: 12234666
    Abstract: An adapter for either a handle set or a lever set door lever is equipped with a pair of springs to provide a pre-load on the spindle. The pre-load prevents sagging of the lever due to the large mass of the lever. A sleeve in the adapter is formed out of a compressible material that accepts the spindle in a press-fit configuration. This allows for greater manufacturing tolerances while still providing a solid and secure engagement between the spindle and the adapter. As a result, any free play in the lever is eliminated and the lever is maintained in a horizontal, home position when the lever is not in use. Following use through rotation of the lever, the springs promptly return the lever back to the home position while the sleeve prevents any slop or free-play in the lever's motion.
    Type: Grant
    Filed: June 29, 2023
    Date of Patent: February 25, 2025
    Assignee: ASSA ABLOY AMERICAS RESIDENTIAL INC.
    Inventors: James Lin, Eric Xin, Doo Fai Yip
  • Publication number: 20240328196
    Abstract: A latch assembly includes a bolt selectively moveable between an extended position and a retracted position. A cam blocker is included and positionable in different configurations. In one configuration, the cam blocker allows the bolt to move towards the retracted position with actuation of a handle in two different rotational directions. In another configuration, the cam blocker allows the bolt to move towards the retracted position with actuation of the handle in only one rotational direction. The latch assembly is also adjustable between at least two different backset distances.
    Type: Application
    Filed: March 15, 2024
    Publication date: October 3, 2024
    Applicant: ASSA ABLOY Americas Residential Inc.
    Inventors: Doo Fai YIP, Oscar ROMERO, Eric XIN, Elena GORKOVENKO, Cathy RAO
  • Publication number: 20240003162
    Abstract: An adapter for either a handle set or a lever set door lever is equipped with a pair of springs to provide a pre-load on the spindle. The pre-load prevents sagging of the lever due to the large mass of the lever. A sleeve in the adapter is formed out of a compressible material that accepts the spindle in a press-fit configuration. This allows for greater manufacturing tolerances while still providing a solid and secure engagement between the spindle and the adapter. As a result, any free play in the lever is eliminated and the lever is maintained in a horizontal, home position when the lever is not in use. Following use through rotation of the lever, the springs promptly return the lever back to the home position while the sleeve prevents any slop or free-play in the lever's motion.
    Type: Application
    Filed: June 29, 2023
    Publication date: January 4, 2024
    Applicant: ASSA ABLOY AMERICAS RESIDENTIAL INC.
    Inventors: JAMES LIN, ERIC XIN, DOO FAI YIP
  • Patent number: 11725416
    Abstract: An adapter for either a handle set or a lever set door lever is equipped with a pair of springs to provide a pre-load on the spindle. The pre-load prevents sagging of the lever due to the large mass of the lever. A sleeve in the adapter is formed out of a compressible material that accepts the spindle in a press-fit configuration. This allows for greater manufacturing tolerances while still providing a solid and secure engagement between the spindle and the adapter. As a result, any free play in the lever is eliminated and the lever is maintained in a horizontal, home position when the lever is not in use. Following use through rotation of the lever, the springs promptly return the lever back to the home position while the sleeve prevents any slop or free-play in the lever's motion.
    Type: Grant
    Filed: December 28, 2017
    Date of Patent: August 15, 2023
    Inventors: James Lin, Eric Xin, Doo Fai Yip
  • Publication number: 20180187450
    Abstract: An adapter for either a handle set or a lever set door lever is equipped with a pair of springs to provide a pre-load on the spindle. The pre-load prevents sagging of the lever due to the large mass of the lever. A sleeve in the adapter is formed out of a compressible material that accepts the spindle in a press-fit configuration. This allows for greater manufacturing tolerances while still providing a solid and secure engagement between the spindle and the adapter. As a result, any free play in the lever is eliminated and the lever is maintained in a horizontal, home position when the lever is not in use. Following use through rotation of the lever, the springs promptly return the lever back to the home position while the sleeve prevents any slop or free-play in the lever's motion.
    Type: Application
    Filed: December 28, 2017
    Publication date: July 5, 2018
    Inventors: James Lin, Eric Xin, Doo Fai Yip