Patents by Inventor William Null

William Null 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).

  • Publication number: 20060157953
    Abstract: A wheelchair includes at least one side frame connected to a front caster assembly, and a cross-brace assembly. The cross-brace assembly includes a cross-brace member; at least one rear caster assembly connected to the cross-brace member; at least one main drive wheel axle tube fitting connected to the cross-brace member; and at least one arm connected to the cross-brace member. The at least one arm is pivotally connected to the at least one side frame through a pivot joint.
    Type: Application
    Filed: January 18, 2006
    Publication date: July 20, 2006
    Inventors: Gerold Goertzen, William Null, Bradley Kushner
  • Publication number: 20060071440
    Abstract: A mid drive scooter includes a frame that supports a seat for a rider of the scooter, a front wheel connected with the frame, left and right drive wheels, and left and right rear wheels. A left suspension is interposed between the frame and the left wheels, and a right suspension is interposed between the frame and the right wheels. The suspensions support the frame on the drive wheels for movement of the frame relative to the drive wheels in first and second degrees of freedom.
    Type: Application
    Filed: September 29, 2004
    Publication date: April 6, 2006
    Inventors: Gerald Fought, John Jindra, Nirav Pandya, Gerald Goertzen, William Null
  • Publication number: 20060021806
    Abstract: The present invention provides a curb-climbing wheelchair having pivotal arm assemblies. The pivotal arm assemblies include at least one front caster and have the ability to rotate or pivot. The pivot arms rotate or pivot in response to moments generated by accelerating or decelerating the wheelchair thereby raising or lowering the front caster(s) through the rotational movement of the pivot arms. By raising or lowering the front caster(s) in such a manner, curb-like obstacles can be traversed in a low-impact manner.
    Type: Application
    Filed: August 22, 2005
    Publication date: February 2, 2006
    Inventors: Gerold Goertzen, William Null
  • Publication number: 20050225040
    Abstract: The present invention provides a curb-climbing wheelchair having pivotal arm assemblies. The pivotal arm assemblies include at least one front caster and have the ability to rotate or pivot. The pivot arms rotate or pivot in response to moments generated by accelerating or decelerating the wheelchair thereby raising or lowering the front caster(s) through the rotational movement of the pivot arms. By raising or lowering the front caster(s) in such a manner, curb-like obstacles can be traversed in a low-impact manner.
    Type: Application
    Filed: June 3, 2005
    Publication date: October 13, 2005
    Inventors: Gerold Goertzen, William Null
  • Publication number: 20050151360
    Abstract: A suspension for a vehicle is provided. The suspension includes, for example, a frame and a releasable locking assembly. The releasable locking assembly has, for example, a first assembly movably coupled to the frame, a second assembly movably coupled to the frame, and wherein movement of the frame relative to the first and second assemblies causes the first and second assemblies to engage each other to limit further movement of the frame in at least a first direction.
    Type: Application
    Filed: March 10, 2005
    Publication date: July 14, 2005
    Inventors: John Bertrand, Gerald Goertzen, William Null
  • Patent number: 4028627
    Abstract: An audio signal quality detector connected to receive an audio signal from the discriminator of a radio receiver and including an envelope detector connected to the output of the discriminator and supplying a signal indicative of the envelope of the audio to a resettable valley detector which stores a voltage indicative of the lowest valley applied thereto subsequent to a reset pulse and a sample and hold gate connected to the valley detector for sampling the voltage stored in the valley detector prior to periodic reset pulses applied to the valley detector. Circuitry is also included for inhibiting the operation of the sample and hold gate when there is no output from the valley detector.
    Type: Grant
    Filed: December 29, 1975
    Date of Patent: June 7, 1977
    Assignee: Motorola, Inc.
    Inventors: Susumu Cho, Paul Milton Erickson, Michael William Null