Patents by Inventor A-Feng Tsai

A-Feng Tsai 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).

  • Piston device and a fluid/gas drawing apparatus and a foam producing apparatus using such piston device
    Patent number: 7717301
    Abstract: A piston device comprises a sleeve, a casing pipe, a first piston, a resilient member, and a second piston. The sleeve includes at least one hole arranged at the periphery of its closed end. The casing pipe has at least a through hole arranged on a lateral side thereof proximate to its closed end and is sheathed and connected to the sleeve by a manner that the open end of the casing pipe is faced toward the closed end of the sleeve. The first piston is arranged to sheathe the casing pipe at a position proximate to the closed end of the casing pipe for selectively covering and exposing the through hole by a reciprocate movement. The resilient member is installed in side the sleeve at a position between the closed end of the sleeve and the first piston while ensheathing the casing pipe therethrough. The second piston is arranged to sheathe the sleeve at a position proximate to its open end.
    Type: Grant
    Filed: May 1, 2006
    Date of Patent: May 18, 2010
    Assignee: Yih Tai Glass Industrial Co., Ltd.
    Inventor: A-Feng Tsai
  • Piston device and a fluid/gas drawing apparatus and a foam producing apparatus using such piston device
    Publication number: 20070119864
    Abstract: A piston device comprises a sleeve, a casing pipe, a first piston, a resilient member, and a second piston. The sleeve includes at least one hole arranged at the periphery of its closed end. The casing pipe has at least a through hole arranged on a lateral side thereof proximate to its closed end and is sheathed and connected to the sleeve by a manner that the open end of the casing pipe is faced toward the closed end of the sleeve. The first piston is arranged to sheathe the casing pipe at a position proximate to the closed end of the casing pipe for selectively covering and exposing the through hole by a reciprocate movement. The resilient member is installed in side the sleeve at a position between the closed end of the sleeve and the first piston while ensheathing the casing pipe therethrough. The second piston is arranged to sheathe the sleeve at a position proximate to its open end.
    Type: Application
    Filed: May 1, 2006
    Publication date: May 31, 2007
    Inventor: A-Feng Tsai
  • Cosmetic container
    Patent number: D503086
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: March 22, 2005
    Assignee: Yih Tai Glass Industrial Co., Ltd.
    Inventor: A-Feng Tsai
  • Cosmetic container
    Patent number: D517733
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: March 21, 2006
    Assignee: Yih Tai Glass Industrial Co., Ltd.
    Inventor: A-Feng Tsai
  • Cosmetic container
    Patent number: D497038
    Type: Grant
    Filed: February 20, 2004
    Date of Patent: October 5, 2004
    Assignee: Yih Tai Glass Industiral Co., Ltd.
    Inventor: A-Feng Tsai