Patents by Inventor Yang-Fong Bai

Yang-Fong Bai 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: 5533231
    Abstract: A concealable baggage caster comprises a caster housing fastened to the bottom edge of a baggage and provided therein with a space for housing a caster and a caster frame. The caster housing is provided respectively in the left and the right side walls thereof with an elongate slot, a pivoting hole and a locating hole. The caster is pivoted between the two lugs of the caster frame which is mounted on a shaft received in the pivoting holes of the caster housing and the pivoting holes of the caster frame. An action plate is fastened pivotally to the action holes of the caster frame. Two guiding pieces and two fevers are pivoted respectively on the two pivoting shafts which are slidably received in the elongate slots of the caster housing. Each of two levers has a central fulcrum hole dimensioned to receive therein a shaft which is also received in the locating holes of the caster housing.
    Type: Grant
    Filed: September 12, 1994
    Date of Patent: July 9, 1996
    Inventor: Yang-Fong Bai