Patents by Inventor Sylvester Yen

Sylvester Yen 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: 7938421
    Abstract: A supporting member that carries at least 1 wheel and either rotates with the wheel to transmit mechanical power to and from it, and allows the wheel to rotate freely on it. The axle is an invention by itself and there is no prior art which has the axle attached to the housing. The axle and wheels can be removed and is therefore easier to ship. The axle can be used in a tricycle, trailer, caboose or any human or mechanical powered vehicle.
    Type: Grant
    Filed: January 15, 2009
    Date of Patent: May 10, 2011
    Inventor: Sylvester Yen
  • Patent number: 6811172
    Abstract: A vehicle such as a bicycle or tricycle having a front steering assembly and a remote, rear steering assembly. The front steering assembly has a steering sleeve with a rotatable front shaft within the sleeve that is connected to the front wheel. The rear steering assembly has a rear shaft rotatably mounted in a steering sleeve and both of the shafts has a steering device such as handlebars accessible to users. The shafts are coupled together to rotate in tandem by means of a substantially flexible coupling, such as a chain operatively connected between sprockets mounted to each of the shafts. Turning either of the handlebars thus turns the front wheel to steer the vehicle.
    Type: Grant
    Filed: September 4, 2002
    Date of Patent: November 2, 2004
    Assignee: Yenson LLC
    Inventor: Sylvester Yen
  • Publication number: 20040041364
    Abstract: A vehicle such as a bicycle or tricycle having a front steering assembly and a remote, rear steering assembly. The front steering assembly has a steering sleeve with a rotatable front shaft within the sleeve that is connected to the front wheel. The rear steering assembly has a rear shaft rotatably mounted in a steering sleeve and both of the shafts has a steering device such as handlebars accessible to users. The shafts are coupled together to rotate in tandem by means of a substantially flexible coupling, such as a chain operatively connected between sprockets mounted to each of the shafts. Turning either of the handlebars thus turns the front wheel to steer the vehicle.
    Type: Application
    Filed: September 4, 2002
    Publication date: March 4, 2004
    Inventor: Sylvester Yen
  • Patent number: 5000470
    Abstract: The invention provides a bicycle having an improved shock absorbing suspension system and an improved shock absorber for a bicycle. The suspension system comprises a single pair of improved shock absorbers associated with the rear wheel of the bicycle. The improved shock absorber comprises an elongated housing having a hollow cylindrical core which receives a shock absorber rod having a piston head. The core of said housing is provided with a multiplicity of longitudinally disposed shock absorbing springs arranged end to end between the closed end of the housing and the piston head. The springs possess different innate resistances to compression so that the shock absorber has a varying shock absorbing capacity. A return spring is lodged in the housing core on the opposite side of the piston head between the piston head and the end of the housing which receives the shock absorber rod.
    Type: Grant
    Filed: July 24, 1989
    Date of Patent: March 19, 1991
    Assignee: Kent International, Inc.
    Inventors: Arnold Kamler, Sylvester Yen
  • Patent number: D588650
    Type: Grant
    Filed: June 13, 2008
    Date of Patent: March 17, 2009
    Inventor: Sylvester Yen