Patents by Inventor Mark A. Krull

Mark A. Krull 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).

  • Exercise resistance methods and apparatus
    Patent number: 6899661
    Abstract: First weights are disposed beneath a base member, and a selector rod is rotated into engagement with a desired number of the first weights. Second weights are disposed on opposite sides of a base member, and selector rods are selectively moved into engagement with the desired number of first weights. Various combinations of these arrangements may be used to provide adjustable resistance to exercise.
    Type: Grant
    Filed: October 7, 2003
    Date of Patent: May 31, 2005
    Inventor: Mark A. Krull
  • Exercise resistance methods and apparatus
    Patent number: 6896645
    Abstract: First and second weight housings are mounted on opposite ends of a handle. Weights are disposed in first and second vertical stacks on opposite ends of a base member. At least one selector rod is selectively moved into engagement with each weight housing and a desired weight in each of the stacks.
    Type: Grant
    Filed: May 9, 2002
    Date of Patent: May 24, 2005
    Inventor: Mark A. Krull
  • Adjustable dumbbell methods and apparatus
    Patent number: 6872173
    Abstract: An exercise dumbbell includes a handle and weights that are selectively latched to opposite ends of the handle. A base is provided to support the handle and the weights when not in use.
    Type: Grant
    Filed: April 3, 2002
    Date of Patent: March 29, 2005
    Inventor: Mark A. Krull
  • Adjustable mass exercise methods and apparatus
    Patent number: 6855097
    Abstract: An exercise dumbbell includes a handle and weight plates maintained in spaced relationship relative thereto. At least one weight selector is movable into and out of engagement with different combinations of the weight plates to secure a desired amount of mass to the handle.
    Type: Grant
    Filed: April 18, 2002
    Date of Patent: February 15, 2005
    Inventor: Mark A. Krull
  • Methods and apparatus for supporting exercise dumbbells
    Publication number: 20040220024
    Abstract: A dumbbell stand includes first and second dumbbell supports that pivot about a common pivot axis between a first, relatively compact configuration and a second, spread apart configuration.
    Type: Application
    Filed: April 30, 2003
    Publication date: November 4, 2004
    Inventor: Mark A. Krull
  • Exercise resistance methods and apparatus
    Publication number: 20040220025
    Abstract: First weights are disposed beneath a base member, and a selector rod is rotated into engagement with a desired number of the first weights. Second weights are disposed on opposite sides of a base member, and selector rods are selectively moved into engagement with the desired number of first weights. Various combinations of these arrangements may be used to provide adjustable resistance to exercise.
    Type: Application
    Filed: May 18, 2004
    Publication date: November 4, 2004
    Inventor: Mark A. Krull
  • Stands for supporting exercise dumbbells
    Publication number: 20040138031
    Abstract: An exercise system includes a unique dumbbell stand configured to support first and second dumbbells in more than one configuration. The dumbbells are preferably mounted on respective floor engaging frame members that are movable relative to one another. The stand is preferably provided with rollers to facilitate rolling across a floor surface, and an accessory tray with compartments to hold personal items for a user.
    Type: Application
    Filed: January 15, 2003
    Publication date: July 15, 2004
    Inventor: Mark A. Krull
  • Weight selection methods and apparatus
    Patent number: 6749547
    Abstract: Discrete weight selecting members are movably mounted on a handle assembly and selectively rotatable into engagement with respective weight plates to provide adjustable resistance to exercise movement.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: June 15, 2004
    Inventor: Mark A. Krull
  • Exercise weight selection methods and apparatus
    Patent number: 6746381
    Abstract: Exercise dumbbells have pairs of weights disposed at opposite ends of a handle. Selector rods are selectively movable into engagement with various combinations of the weights.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: June 8, 2004
    Inventor: Mark A. Krull
  • Exercise resistance methods and apparatus
    Patent number: 6733424
    Abstract: Weights are disposed on opposite sides of a base member, and selector rods are selectively moved into engagement with the desired number of weights on each side of the base member.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: May 11, 2004
    Inventor: Mark A. Krull
  • Methods and apparatus for adjusting weight resistance to exercise
    Publication number: 20040072661
    Abstract: An exercise dumbbell includes a handle member and weight plates maintained in spaced relationship at opposite ends thereof. Weight selectors are movable into and out of engagement with different combinations of the weight plates to secure a desired amount of mass to the handle. The weight selectors are preferably nested within respective ends of the handle member and accessible via upwardly opening slots in the weight plates.
    Type: Application
    Filed: October 11, 2002
    Publication date: April 15, 2004
    Inventor: Mark A. Krull
  • Adjustable weight exercise methods and apparatus
    Patent number: 6719674
    Abstract: An exercise dumbbell system includes a handle and weight plates maintained in spaced relationship at opposite ends thereof. Weight selectors are movable laterally into and out of engagement with respective weight plates to secure them relative to the handle. Each weight plate is provided with a pathway having at least one notch that opens upward, and at least one groove that is bounded above by a lip. The selectors have respective weight engaging portions that travel along respective pathways to alternatively underlie different combinations of the weights.
    Type: Grant
    Filed: January 15, 2003
    Date of Patent: April 13, 2004
    Inventor: Mark A. Krull
  • Methods and apparatus for supporting selectorized dumbbells
    Publication number: 20040023765
    Abstract: Various exercise systems include first and second selectorized dumbbell assemblies; and a frame having first and second weight supports to support respective dumbbell assemblies. Generally speaking, the systems assume multiple configurations to facilitate both use and storage of the dumbbell assemblies. Many of the systems include at least one body supporting platform that is movable between a first position that is suitable for exercise, and a second position that is suitable for transportation and/or storage.
    Type: Application
    Filed: August 1, 2003
    Publication date: February 5, 2004
    Inventor: Mark A. Krull
  • Adjustable weight exercise methods and apparatus
    Patent number: 6679816
    Abstract: An exercise dumbbell includes a handle and weight plates maintained in spaced relationship relative thereto. At least one latch is movable into and out of engagement with desired weight plates to prevent movement of the engaged weight plates in a first direction, and thereby secure same relative to the handle. At least one catch is connected to the at least one latch and operable in a second, discrete direction to encourage the latch to remain engaged with the weight plates.
    Type: Grant
    Filed: June 11, 2002
    Date of Patent: January 20, 2004
    Inventor: Mark A. Krull
  • Weight selection methods and apparatus
    Patent number: 6669606
    Abstract: Weight supporting members are rotated into engagement with respective weight plates to provide adjustable resistance to exercise movement. On a first embodiment, the weight supports are rigidly mounted on a selector rod and rotate together therewith. On a second embodiment, the weight supports are rotatably mounted on the selector rod and rotate relative thereto.
    Type: Grant
    Filed: December 21, 2000
    Date of Patent: December 30, 2003
    Inventor: Mark A. Krull
  • Methods and apparatus for adjusting resistance to exercise
    Patent number: 6666800
    Abstract: A weight stack exercise machine includes a stack of primary weights movably mounted on a frame, and at least one counter-weight which is selectively alternated between an inactive state, supported by the frame, and an active state, exerting a counter-weight force relative to the top plate in the stack of primary weights.
    Type: Grant
    Filed: February 28, 2001
    Date of Patent: December 23, 2003
    Inventor: Mark A. Krull
  • Shoe accessory methods and apparatus
    Patent number: 6640467
    Abstract: A figurine is mounted on a shoe. On a preferred embodiment, the figurine stands upright on top of the toe portion of the shoe; is selectively removable from the shoe; and is capable of standing upright on a floor surface when removed from the shoe.
    Type: Grant
    Filed: July 2, 2002
    Date of Patent: November 4, 2003
    Inventor: Mark A. Krull
  • Adjustable mass exercise methods and apparatus
    Publication number: 20030199369
    Abstract: An exercise dumbbell includes a handle and weight plates maintained in spaced relationship relative thereto. At least one weight selector is movable into and out of engagement with different combinations of the weight plates to secure a desired amount of mass to the handle.
    Type: Application
    Filed: April 18, 2002
    Publication date: October 23, 2003
    Inventor: Mark A. Krull
  • Weight selection methods and apparatus
    Publication number: 20030199368
    Abstract: An exercise dumbbell has at least one weight selector that is rotatable into engagement with various combination of weights at opposite ends of the handle. On a first embodiment, first and second weight selectors are rotatably mounted on opposite ends of a bar for independent rotation relative to the handle. On a second embodiment, first and second weight selectors are keyed to a common bar and rotated together therewith relative to the handle.
    Type: Application
    Filed: April 18, 2002
    Publication date: October 23, 2003
    Inventor: Mark A. Krull
  • Selectorized dumbbell handle
    Patent number: D500820
    Type: Grant
    Filed: July 29, 2003
    Date of Patent: January 11, 2005
    Inventor: Mark A. Krull