Patents by Inventor Bertha L. McClellan

Bertha L. McClellan 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: 7987933
    Abstract: The motorized stroller apparatus features double wheels at all four corners for lesser rolling resistance over various surfaces. The front wheel sets are fully pivotal. The on/off switch provides more than one function. In the on position, the motor is connected with the axle. The motor thereby serves as an automatic brake until the spring biased throttle lever is actuated. Spring bias causes throttle shut off when released. In the off position, the switch disengages the axle from the motor, thereby allowing for stroller function in a non-powered mode. The optional dual rear wheel sets drive encourages the stroller to track straight, as opposed to single wheel set drive which would continually encourage angular propulsion.
    Type: Grant
    Filed: February 12, 2009
    Date of Patent: August 2, 2011
    Inventors: John L. McClellan, Bertha L. McClellan