Patents by Inventor Rong-Tuan Cai

Rong-Tuan Cai 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: 8127781
    Abstract: An automatic collapsible umbrella (100) comprises an idle-popup resistant device (5) to avoid the telescopic stick (3) popping up unexpectedly while folding the umbrella and hurting the person close by. Said idle-popup resistant device (5) consists essentially of a tow rope (51), a ratchet wheel (52), a spiral spring (54) and a pawl (55). The ratchet wheel (52) and the pawl (55) are controlled by a locking head (45). The tow rope (51) passes through the telescopic stick (3) and an end thereof winds the ratchet wheel (52). By the installation of the ratchet and spiral spring (54), the telescopic stick (3) is allowed to move in unidirectional fashion and to be retracted gradually, improving the safety of the umbrella.
    Type: Grant
    Filed: July 6, 2009
    Date of Patent: March 6, 2012
    Inventor: Rong-Tuan Cai
  • Publication number: 20110114142
    Abstract: An automatic collapsible umbrella (100) comprises an idle-popup resistant device (5) to avoid the telescopic stick (3) popping up unexpectedly while folding the umbrella and hurting the person close by. Said idle-popup resistant device (5) consists essentially of a tow rope (51), a ratchet wheel (52), a spiral spring (54) and a pawl (55). The ratchet wheel (52) and the pawl (55) are controlled by a locking head (45). The tow rope (51) passes through the telescopic stick (3) and an end thereof winds the ratchet wheel (52). By the installation of the ratchet and spiral spring (54), the telescopic stick (3) is allowed to move in unidirectional fashion and to be retracted gradually, improving the safety of the umbrella.
    Type: Application
    Filed: July 6, 2009
    Publication date: May 19, 2011
    Inventor: Rong Tuan Cai