Patents by Inventor Ervin C. Kallstrom

Ervin C. Kallstrom 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).

  • Pneumatic trailer system
    Patent number: 6349952
    Abstract: A trailer with a frame having a center load receiving channel for a motorcycle or for a similar load. A pair of oppositely extending wheel supporting axles are pivotally mounted near the center channel. Bladder type air cylinders extend between the frame and axles near the outer end of the axles. An air suspension system automatically controls the inflation of the air cylinder during transit and allows the user to selectively deflate the air springs to lower the trailer to a position close to the ground so a load such as a motorcycle can be rolled into the trailer. The user can then operate the system to inflate the air cylinder. Level control valves maintain the air cylinders at the proper position. A fail safe system maintaining the trailer in an elevated position in the event of air system failure.
    Type: Grant
    Filed: May 26, 2000
    Date of Patent: February 26, 2002
    Inventor: Ervin C. Kallstrom
  • Pneumatic trailer system
    Patent number: 6068276
    Abstract: A trailer with a frame having a center load receiving channel for a motorcycle or for a similar load. A pair of oppositely extending wheel supporting axles are pivotally mounted near the center channel.Bladder-type air cylinders extend between the frame and axles near the outer end of the axles. An air suspension system automatically controls the inflation of the air cylinder during transit and allows the user to selectively deflate the air springs to lower the trailer to a position close to the ground so a load such as a motorcycle can be rolled into the trailer. The user can then operate the system to inflate the air cylinder. Level control valves maintain the air cylinders at the proper position. A fail safe system maintains the trailer in an elevated position in the event of air system failure.
    Type: Grant
    Filed: June 10, 1997
    Date of Patent: May 30, 2000
    Inventor: Ervin C. Kallstrom
  • Stand for vehicle wheel
    Patent number: 5735410
    Abstract: A stand for locking the front wheel of a vehicle, such as a motorcycle, in a stable position. The stand has front and rear support mechanisms which, in a preferred embodiment, are actuated by a ramp so that the weight of the front wheel of the motorcycle as it is rolled onto the ramp will actuate the front and rear supports to engage the tire at locations forward and rearward of the wheel axis of rotation.
    Type: Grant
    Filed: September 12, 1996
    Date of Patent: April 7, 1998
    Inventor: Ervin C. Kallstrom