Patents by Inventor John J. Stallbaumer

John J. Stallbaumer 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: 20230415842
    Abstract: A rider-propelled vehicle comprising a rear wheel assembly, a front wheel assembly, a dual drive and steering assembly, and a drive train. The rear wheel assembly and the front wheel assembly include 24 inch (ISO 507 mm) or larger wheels. Pedals of the dual drive and steering assembly extend laterally exterior from drive links of the dual drive and steering assembly so that feet of the rider straddle the left and right drive link. A steering train of the dual drive and steering assembly is configured so that the front wheel assembly turns entirely forward of the range of motion of left and right handlebar assemblies of the dual drive and steering assembly.
    Type: Application
    Filed: June 27, 2022
    Publication date: December 28, 2023
    Inventor: John J. Stallbaumer
  • Patent number: 6758482
    Abstract: A multipurpose cart having a hand truck base with a nose extension, a tub, a handle wherein the handle is adjustably mounted in two positions 90 degrees apart, a shelf, caster wheels and a storage device. The multipurpose cart can be modified into various configurations for a variety of functions.
    Type: Grant
    Filed: March 27, 2002
    Date of Patent: July 6, 2004
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Publication number: 20030062700
    Abstract: A multipurpose cart having a hand truck base with a nose extension, a tub, a handle wherein the handle is adjustably mounted in two positions 90 degrees apart, a shelf, caster wheels and a storage device. The multipurpose cart can be modified into various configurations for a variety of functions.
    Type: Application
    Filed: March 27, 2002
    Publication date: April 3, 2003
    Applicant: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: 6481727
    Abstract: A hand truck toe plate formed from light gauge steel sheet having a load supporting horizontal portion and a mounting vertical portion. The horizontal portion and vertical portion are separated by a 90 degree bend and include a plurality of longitudinal ribs. The vertical portion also includes two lateral ears that each have an end defined by a notch and are adapted to be mounted to side frames of the hand truck.
    Type: Grant
    Filed: November 23, 1999
    Date of Patent: November 19, 2002
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: 6308967
    Abstract: A dual position hand truck includes a central frame having two side rails and a toe plate. Positioned at an upper end of the central frame is a U-shaped handle bar which has a hand gripping portion and two extended legs with castered wheels attached at their respective bottom ends. The handle bar is pivotally attached to the frame by a fixed shaft and a pair of support brackets. The support brackets also allow the extended legs to slide along their length. Attached to the support brackets is a spring biased locking bar which locks the handle bar against rotational movement relative to the frame.
    Type: Grant
    Filed: June 2, 2000
    Date of Patent: October 30, 2001
    Assignee: Harper Trucks, Inc.
    Inventors: John J. Stallbaumer, Robert D. Rahn
  • Patent number: 5749588
    Abstract: A two-wheeled hand truck comprising a pair of side frames molded from highstrength plastic formed in an open truss with compression and tensile members. The side frames are held in a rigid parallel relationship to each other by cross rails, handles and a toe plate with integral stiffeners attached to the side frames.
    Type: Grant
    Filed: July 29, 1996
    Date of Patent: May 12, 1998
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: D384467
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: September 30, 1997
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer
  • Patent number: D395105
    Type: Grant
    Filed: February 28, 1997
    Date of Patent: June 9, 1998
    Assignee: Harper Trucks, Inc.
    Inventor: John J. Stallbaumer