Patents by Inventor Ching Chuan

Ching Chuan 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: 4659125
    Abstract: A handle rod structure of a golf ball retriever comprising a plurality of sections of telescopic tubes which can be telescopic in sequence, whereas in each two adjoining tubes, a plunger having an annular groove is provided and inserted into the inner tube. The annular groove forms an eccentric to match the annular sleeve plate which has internal eccentricity the same as that of the annular groove. The annular sleeve plate is placed in the annular groove, so that the rotation of the inner tube in one direction, causes the annular sleeve plate to tightly engage the inner wall of the outer tube, and the rotation of the inner tube in the other direction loosens the annular sleeve plate in the outer tube, thus placing the inner and outer tubes in a state such that they can freely and oppositely extend or retract, thereby achieving the actions of the multi-sectional type and length-adjustable handle rod of the retriever.
    Type: Grant
    Filed: May 23, 1985
    Date of Patent: April 21, 1987
    Inventor: Ching Chuan