Patents by Inventor Lawson J. Zent

Lawson J. Zent 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: 4071235
    Abstract: A frame having a base and two horizontally spaced substantially upright elongate posts, a first of which carries a saddle seat. Mounted for rotation on the second post is a foot pedal spindle carrying first and second sprocket wheels. Also mounted for rotation on the second post is a disc spindle carrying a disc and a sprocket wheel. Mounted for rotation near the top of the second post is a hand crank spindle carrying a sprocket wheel. A drive chain is entrained over the disc sprocket wheel and the first foot pedal sprocket wheel. A second chain is entrained over the handle bar sprocket wheel and the second foot pedal sprocket wheel, which sprocket wheels are designed to provide predetermined different angular speeds to their respective spindles. A manually operable pointer is rotatably mounted on the second post to vary the spacing between two brake pads mounted on either side of the disc to provide a variable braking force to the disc corresponding to such spacing.
    Type: Grant
    Filed: February 2, 1976
    Date of Patent: January 31, 1978
    Inventor: Lawson J. Zent
  • Patent number: 3991749
    Abstract: An exercising apparatus having rotatable foot pedals and hand graspable crank arms in a frame which is provided with a seat upon which an individual can be supported while grasping the crank arms and while having the feet on the foot pedals of the apparatus. A motor is provided for driving the foot pedals and crank arms in rotation, and is so connected thereto that the individual crank arms and individual foot pedals can rotate at respective speeds and, furthermore, so that the crank arm and foot pedal on one side of the machine can rotate in a direction opposite to those on the other side of the machine. The apparatus includes a control for varying the speed of rotation of the foot pedals and crank arms and also includes an emergency stop switch that can be operated by the individual for halting the apparatus.
    Type: Grant
    Filed: November 17, 1975
    Date of Patent: November 16, 1976
    Inventor: Lawson J. Zent