Patents by Inventor Bruce A. Helder

Bruce A. Helder 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).

  • Hot tub cover lifter
    Patent number: 7155756
    Abstract: This invention encompasses an automated mechanism to remove a heavy and bulky insulating cover from an above-floor hot tub (or spa), and to provide a storage location for the cover when the tub is in use. The cover lifter can be fully automatic or semi automatic, and can be operated either electrically, or by fluid or air under pressure.
    Type: Grant
    Filed: September 13, 2004
    Date of Patent: January 2, 2007
    Inventor: Bruce A. Helder
  • Hydraulic actuator assembly with rotation restraint
    Patent number: 7033066
    Abstract: A hydraulic actuator assembly comprises a pair of hydraulic actuators having cylinders, pistons, and piston rods that are ganged together for extension of their respective piston rods in longitudinally opposite directions wherein at least one of the actuators comprises an anti-rotation mechanism that prevents rotation of the actuator assembly about its longitudinal axis. The anti-rotation mechanism comprises an axial anti-rotation rod rigidly attached to a cylinder having a non-circular cross-section slidably complementary to a non-circular aperture in a hollow piston rod. The piston rod can travel longitudinally along the anti-rotation rod, but is prevented from rotating by the non-circular cross-section.
    Type: Grant
    Filed: October 22, 2003
    Date of Patent: April 25, 2006
    Inventor: Bruce A. Helder
  • HYDRAULIC ACTUATOR ASSEMBLY WITH ROTATION RESTRAINT
    Publication number: 20040105340
    Abstract: A hydraulic actuator assembly comprises a pair of hydraulic actuators having cylinders, pistons, and piston rods that are ganged together for extension of their respective piston rods in longitudinally opposite directions wherein at least one of the actuators comprises an anti-rotation mechanism that prevents rotation of the actuator assembly about its longitudinal axis. The anti-rotation mechanism comprises an axial anti-rotation rod rigidly attached to a cylinder having a non-circular cross-section slidably complementary to a non-circular aperture in a hollow piston rod. The piston rod can travel longitudinally along the anti-rotation rod, but is prevented from rotating by the non-circular cross-section.
    Type: Application
    Filed: October 22, 2003
    Publication date: June 3, 2004
    Inventor: Bruce A. Helder
  • Cylinder mounting assembly for truck mounted scraper blade
    Patent number: 6634122
    Abstract: An improved hydraulic cylinder construction having a feature thereon facilitating operative connection with a service kit to enable a quick and injury free removal thereof from a location whereat the hydraulic cylinder is spring biased in a shock absorber installation, particularly for use in a scraper blade mounting assembly.
    Type: Grant
    Filed: October 29, 2002
    Date of Patent: October 21, 2003
    Assignee: Root Spring Scraper Co.
    Inventors: David M. Vermeulen, Bruce A. Helder
  • CYLINDER MOUNTING ASSEMBLY FOR TRUCK MOUNTED SCRAPER BLADE
    Publication number: 20030188461
    Abstract: An improved hydraulic cylinder construction having a feature thereon facilitating operative connection with a service kit to enable a quick and injury free removal thereof from a location whereat the hydraulic cylinder is spring biased in a shock absorber installation, particularly for use in a scraper blade mounting assembly.
    Type: Application
    Filed: October 29, 2002
    Publication date: October 9, 2003
    Inventors: David M. Vermeulen, Bruce A. Helder