Patents by Inventor Li-Tu Wu

Li-Tu 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).

  • Patent number: 9808914
    Abstract: A fastener structure for pliers contains: a first connecting arm, a second connecting arm, and a slidable fastener. The first connecting arm is rotatably connected with the second connecting arm to form a griping segment and a working segment and includes a holder which has two guiding rails. The first connecting arm also includes a first notch and a second notch, and the second connecting arm includes a locking seat. The slidable fastener is hollow and retains with the holder, and the slidable fastener includes two guide posts, a positioning plate, and an elastic locker mounted on the positioning plate to alternatively retain with the first notch or the second notch, such that when the elastic locker retains with the first notch, the positioning plate limits the locking seat, and when the elastic locker retains with the second notch, the positioning plate releases the locking seat.
    Type: Grant
    Filed: January 6, 2015
    Date of Patent: November 7, 2017
    Inventor: Li-Tu Wu
  • Publication number: 20170203413
    Abstract: A safety structure for pliers contains: a fixed clamp jaw, a movable clamp jaw, a first handle, a second handle, an actuation unit, and an adjustment screw. The fixed clamp jaw is disposed on the first handle, and the movable clamp jaw is rotatably connected with the fixed clamp jaw and the second handle. The actuation unit includes a spring mounted on the first handle and between two rotatable connecting portions of the movable clamp jaw, and the actuation unit also includes a driving post rotatably connected the second handle and inserted into the first handle. The actuation unit further includes a threaded post having an arcuate section and includes a pushing post rotatably joined with the second handle and forced by the arcuate section. The driving post has a push portion, and the adjustment screw is screwed into the second handle and abuts against the push portion.
    Type: Application
    Filed: January 18, 2016
    Publication date: July 20, 2017
    Inventor: Li-Tu WU
  • Publication number: 20170203414
    Abstract: A switching structure for pliers contains: a fixed clamp jaw, a movable clamp jaw, a first handle, a second handle, an actuation unit, and an adjustable threaded rod. The fixed clamp jaw is disposed on the first handle, the movable clamp jaw is rotatably connected with the fixed clamp jaw and the second handle. The actuation unit includes a spring, a driving post, a pushing post, and a switch element, the driving post has an arcuate section and a push portion. The switch element is rotatably coupled with one side surface of the driving post and pushes an inner surface of the second handle so as to limit a rotatable angle of the driving post and the second handle, the switch element has an arcuately convex face and a flat face which alternatively contact with the inner surface of the second handle.
    Type: Application
    Filed: January 18, 2016
    Publication date: July 20, 2017
    Inventor: Li-Tu Wu
  • Publication number: 20150246433
    Abstract: A universal plier structure contains: a first handle, a second handle, a first extending arm, a second extending arm, and an adjusting member. The first extending arm is disposed on the first handle and includes a first orifice, the second extending arm is mounted on the second handle and includes a connecting extension overlapping with the first orifice, and the connecting extension has a second orifice corresponding to the first orifice. The first extending arm also includes a first cutting face defined thereon, the second extending arm also includes a second cutting face defined on a peripheral side thereof and corresponding to the first cutting face, the adjusting member is defined between the first handle and the second handle and is used to adjust a distance between the first handle and the second handle so as to change a distance between the first extending arm and the second extending arm.
    Type: Application
    Filed: February 28, 2014
    Publication date: September 3, 2015
    Inventor: LI-TU WU
  • Publication number: 20150239101
    Abstract: A fastener structure for pliers contains: a first connecting arm, a second connecting arm, and a slidable fastener. The first connecting arm is rotatably connected with the second connecting arm to form a griping segment and a working segment and includes a holder which has two guiding rails. The first connecting arm also includes a first notch and a second notch, and the second connecting arm includes a locking seat. The slidable fastener is hollow and retains with the holder, and the slidable fastener includes two guide posts, a positioning plate, and an elastic locker mounted on the positioning plate to alternatively retain with the first notch or the second notch, such that when the elastic locker retains with the first notch, the positioning plate limits the locking seat, and when the elastic locker retains with the second notch, the positioning plate releases the locking seat.
    Type: Application
    Filed: January 6, 2015
    Publication date: August 27, 2015
    Inventor: LI-TU WU
  • Publication number: 20150239100
    Abstract: A fastener structure for pliers contains a first plier part, a second plier part, and a slidable fastener. The first plier part is pivotally connected with the second plier part to form two handle segments and two operating segments of the first plier part and the second plier part. The first plier part includes a fixing mount disposed on a handle segment thereof adjacent to a connecting portion of the first plier part and the second plier part and includes at least one guiding rail formed on the fixing mount. The second plier part includes a retaining seat mounted on a handle segment thereof proximate to the connecting portion of the first plier part and the second plier part. The slidable fastener includes at least one guide protrusion for retaining with the at least one guiding rail and includes a positioning rib for limiting or releasing the retaining seat.
    Type: Application
    Filed: February 25, 2014
    Publication date: August 27, 2015
    Inventor: LI-TU WU
  • Publication number: 20070132140
    Abstract: A method for making a baseball bat includes the steps of preparing a solid bar made of silicone and having a tapered body with a first end and a second end provided with a diameter larger than that of the first end, wrapping a layer of composite fiber around the solid bar, placing the combination of the solid bar and the composite fiber layer into a mold, heating and pressurizing the combination of the solid bar and the composite fiber layer to expand the solid bar as well as the composite fiber layer, curing the combination of the solid bar and the composite fiber layer to allow the solid bar to return to its original dimension and removing the solid bar from the composite fiber layer and capping the composite fiber layer with a cover.
    Type: Application
    Filed: December 9, 2005
    Publication date: June 14, 2007
    Inventor: Li-Tu Wu
  • Publication number: 20050223853
    Abstract: A tool with colored patterns has a tool body having a surface and at least one colored pattern layer. The at least one colored pattern layer may form exquisite and colorful characters or figures and may be attached to any the surface of the tool. Therefore the appearance of the tool is more attractive, and a user can see the characters or figures on the tool and identify the tool easily.
    Type: Application
    Filed: April 9, 2004
    Publication date: October 13, 2005
    Inventor: Li-Tu Wu
  • Patent number: D801771
    Type: Grant
    Filed: August 4, 2016
    Date of Patent: November 7, 2017
    Inventor: Li-Tu Wu