Patents by Inventor Aimei Wu

Aimei Wu 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).

  • Speed reducer arrangement for a line retraction device
    Patent number: 10357670
    Abstract: A speed reducer arrangement (200) for a line retraction device (100), including at least one lug (4) fixed on a surface of a rotatable hub (2) and configured to rotate along with the hub (2); at least one brake shoe (5) having at least one groove (8) extending therethrough and configured to at least partially receive the at least one lug (4), such that, as the hub (2) rotates, the at least one brake shoe (5) is configured to slidably move along the at least one groove (8) from an inactivated position, wherein the at least one brake shoe (5) is located nearest the center of the hub (2) to an activated position, wherein the at least one brake shoe (5) contacts at least one contact surface of the line retraction device (100) to thereby slow the rotation of the hub (2); and at least one biasing member (6) configured to urge the at at least one brake shoe (5) towards the inactivated position.
    Type: Grant
    Filed: February 14, 2016
    Date of Patent: July 23, 2019
    Assignee: MSA (Suzhou) Safety Equipment R&D Co., Ltd.
    Inventor: Aimei Wu
  • Speed Reducer Arrangement for a Line Retraction Device
    Publication number: 20180028844
    Abstract: A speed reducer arrangement (200) for a line retraction device (100), including at least one lug (4) fixed on a surface of a rotatable hub (2) and configured to rotate along with the hub (2); at least one brake shoe (5) having at least one groove (8) extending therethrough and configured to at least partially receive the at least one lug (4), such that, as the hub (2) rotates, the at least one brake shoe (5) is configured to slidably move along the at least one groove (8) from an inactivated position, wherein the at least one brake shoe (5) is located nearest the center of the hub (2) to an activated position, wherein the at least one brake shoe (5) contacts at least one contact surface of the line retraction device (100) to thereby slow the rotation of the hub (2); and at least one biasing member (6) configured to urge the at at least one brake shoe (5) towards the inactivated position.
    Type: Application
    Filed: February 14, 2016
    Publication date: February 1, 2018
    Inventor: Aimei Wu