Patents by Inventor Rui-Chi Shen

Rui-Chi Shen 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 wrench operated conveniently
    Patent number: 7121170
    Abstract: A ratchet wrench includes a handle, a drive head, a ratchet wheel, a pawl member, a control knob, a positioning plate, and an urging spring. Thus, the ratchet wrench includes a positioning plate to push the pawl member, thereby reducing the volume of the ratchet wrench efficiently. In addition, the urging spring is supported and guided by the guide shaft of the positioning plate, so that the positioning plate is not easily deformed, thereby facilitating movement of the urging spring in the positioning plate.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: October 17, 2006
    Assignee: Stanley Chiro International, Ltd.
    Inventor: Rui-Chi Shen
  • Ratchet wrench having exact limit effect
    Patent number: 6959626
    Abstract: A ratchet wrench includes a handle, a drive head, a ratchet wheel, a control knob, and a substantially C-shaped limit spring. Thus, the control knob is rigidly and stably positioned in the receiving chamber of the drive head by the limit spring, thereby facilitating a user operating the control knob. In addition, the ratchet wrench only needs to provide a limit spring to position the control knob rigidly and stably, so that the ratchet wrench has a simplified construction, thereby decreasing costs of fabrication.
    Type: Grant
    Filed: April 21, 2004
    Date of Patent: November 1, 2005
    Assignee: Stanley Chiro International, Ltd.
    Inventor: Rui-Chi Shen
  • RATCHET WRENCH HAVING EXACT LIMIT EFFECT
    Publication number: 20050235782
    Abstract: A ratchet wrench includes a handle, a drive head, a ratchet wheel, a control knob, and a substantially C-shaped limit spring. Thus, the control knob is rigidly and stably positioned in the receiving chamber of the drive head by the limit spring, thereby facilitating a user operating the control knob. In addition, the ratchet wrench only needs to provide a limit spring to position the control knob rigidly and stably, so that the ratchet wrench has a simplified construction, thereby decreasing costs of fabrication.
    Type: Application
    Filed: April 21, 2004
    Publication date: October 27, 2005
    Applicant: Stanley Chiro International, Ltd.
    Inventor: Rui-Chi Shen
  • Ratchet wrench operated conveniently
    Publication number: 20050235783
    Abstract: A ratchet wrench includes a handle, a drive head, a ratchet wheel, a pawl member, a control knob, a positioning plate, and an urging spring. Thus, the ratchet wrench includes a positioning plate to push the pawl member, thereby reducing the volume of the ratchet wrench efficiently. In addition, the urging spring is supported and guided by the guide shaft of the positioning plate, so that the positioning plate is not easily deformed, thereby facilitating movement of the urging spring in the positioning plate.
    Type: Application
    Filed: April 21, 2004
    Publication date: October 27, 2005
    Applicant: Stanley Chiro International, Ltd.
    Inventor: Rui-Chi Shen