Patents by Inventor Cheng-Hsung Chuang

Cheng-Hsung Chuang 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).

  • Ratchet mechanism
    Patent number: 5642794
    Abstract: A ratchet mechanism includes a rod having a gear and rotatably received in a barrel which has a slot. A slide is slidably engaged in the slot and has two ratchet teeth for engaging with the gear. A pusher is engaged on the slide and has a knob. A spring may bias the ratchet teeth to engage with the gear. A sleeve is engaged on the barrel and has a groove aligned with the slot. The ratchet teeth may be engaged with the gear separately or simultaneously in order to control the rotational directions of the rod and the gear.
    Type: Grant
    Filed: March 11, 1996
    Date of Patent: July 1, 1997
    Inventors: Cheng-Hsung Chuang, Chen-Niu Huang, Mu-Tung Lai, Jui-Feng Chang