Binder device releasably engaging aperture or notch of sheet – Resilient sheet retainer requiring deflection for sheet removal – Releasably attached to keeper
Reexamination Certificate
1999-02-09
2001-07-17
Mulcahy, John (Department: 3739)
Binder device releasably engaging aperture or notch of sheet
Resilient sheet retainer requiring deflection for sheet removal
Releasably attached to keeper
C482S108000
Reexamination Certificate
active
06261022
ABSTRACT:
BACKGROUND OF THE INVENTION
1.The Field of the Invention
This invention is in the field of weight lifting equipment. More specifically, this invention is in the field of hand-held weights.
2. The Relevant Technology
Hand-held weights such as barbells and dumbbells have been used for many years by exercisers engaging in weightlifting. Some hand-held weight systems include a bar configured to removably receive a variety of different weights which slide onto the bar. Other weight systems include a handle and disks integrityrally attached on opposing sides of the handle.
It is common for commercial gyms and home gyms to include barbells or dumbbells which are stored on a bench or on the floor. These hand-held weights are used for exercises such as a military press to strengthen the upper body, curls to strengthen the biceps, and squats to strengthen the upper and lower body. Sometimes dumbbells are held while jogging or running in place to enhance the exercise experience.
While lifting a weight which is too small may not provide the adequate training desired by a user, lifting a weight which is too heavy may strain or injure the user. The exerciser may be interested in lifting a lighter weight on one day, then ramp up to a heavier weight on another day. Thus, for the sake of safety and for the appropriate amount of exercise, it is useful to provide a variety of options for the exerciser.
In order to permit a number of different users to lift handweights, it is common for gyms to provide a variety of different weights and sizes of integral or adjustable weights. Despite the advantages of having a variety of different handweights, however, providing an assortment of different handweights is expensive and increases the amount of storage space required. In order to use space more efficiently, gyms typically include a shelf or cabinet for receiving differently-sized handweights.
In the event a weight bench or cabinet is not employed, the user is often forced to leave the weights on the floor, which is a highly inefficient use of space and provides a cluttered appearance. Thus, in order to use space more efficiently, the user is required not only to purchase the assortment of handweights but must also purchase a bench or cabinet for storing the various handweights.
Another problem within the art is that it is often cumbersome to mount weights onto a bar. Weights sometimes include holes therein and are disposed about the bar without being otherwise secured to the bar. One disadvantage with these weights is that it is possible for one or both of the weights on opposing sides of the bar to fall off. This can be inconvenient or even dangerous for the user or for a person adjacent to the user such as a spotter or coach.
For example, if the exerciser is lying on a bench performing a military press and a weight on one side of a bar falls off the bar, the weight on the other side of the bar causes the bar to tip toward the weighted side. If this action occurs suddenly, the non-weighted side can be quickly thrust toward the weighted side, possibly causing injury or damage.
In other embodiments, weights are prevented from falling from a bar through the use of screws disposed through circular brackets coupled outside the weights to the bar. These mechanisms, however, are often inconvenient to mount onto the bar and remove from the bar. Each of these mechanisms must be placed onto the bar separately and on opposing sides of the bar. Another problem within the art is the expense of purchasing separate pieces of equipment for each different weight desired to be used by the weightlifter.
One product known as the POWERBLOCK attempts to provide a selectorized dumbbell which allows a user to select a desired weight to be lifted from a set of stacked weights. A user inserts a core having an internal band grip into a set of stacked weights, then selects a desired number of weights using a selector pin.
The POWERBLOCK however, interferes with the natural movement of the user's wrists and has an unusual rectangular block appearance. The user must reach into the rectangular structure to pick up the weights. As a result, the rectangular structure can inconveniently contact the wrists during use. In addition, the removable selector pin can be lost or misplaced and is inconvenient to orient into and remove from the weights. The pin must also be mounted from a location remote from the location where the practitioner grasps the handle.
SUMMARY AND OBJECTS OF THE INVENTION
It is therefore an object of the present invention to provide an improved weightlifting system.
It is another object of the invention to provide an improved weightlifting bar.
It is another object of the invention to provide an improved weight.
It is another object of the invention to provide a weightlifting system which selectively, conveniently allows a user to adjust the weight of the weightlifting system.
It is another object of the invention to provide a weightlifting system which includes a plurality of weights which are removably coupled to a weightlifting bar.
It is another object of the invention to provide a weightlifting bar which conveniently allows a user to add additional weights or remove excess weights from the weightlifting bar.
It is another object of the invention to eliminate unnecessary expense on separate pieces of weightlifting equipment.
It is another object of the invention to eliminate wasted storage space in exercise gyms.
The present invention relates to a weightlifting system comprising (i) one or more weights; and (ii) a weightlifting bar configured to selectively engage the one or more weights. A weight of the present invention has an upstanding first end, an upstanding second end, and a cross member extending therebetween. Each of the first and second ends of the weight has an aperture therethrough.
The weightlifting bar comprises (i) a handle having opposing ends; and (ii) means for selectively attaching each end of the handle to a corresponding end of the weight when the handle is disposed between the first end and second end of the weight. The means for selectively attaching each end of the handle to a corresponding end of the weight preferably comprises: (i) a pinion gear rotatably disposed within a channel of the handle; (ii) a first rod movably disposed within the channel; and (iii) a second rod movably disposed within the channel. Each rod has teeth formed along a length thereof which engage the pinion gear.
By selectively moving one of the rods, the user manually advances both rods through opposing ends of the handle. Thus, the rods pass through respective apertures in the first and second ends of the weight, removably coupling the weight to the handle.
The invention further includes a second weight configured to receive the first weight between the ends thereof in a nested relationship. In this nested relationship, the apertures in the upstanding ends of the first and second weights are in axial alignment. This allows the rods to pass through the apertures in both weights when the user desires to lift both weights. One or both weights is then conveniently removed from the weight lifting bar by manually retracting the rods out of one or both weights.
In one embodiment, the rods are advanced in desired increments out of opposing ends of the handle. In order to advance the rods in desired increments, the handle includes a plurality of longitudinally aligned slots formed within the channel. A knob on one of the rods is configured to selectively engage a pair of desired slots. This maintains each rod in a desired orientation with respect to the handle until the knob is selectively moved from that orientation to another pair of slots by the user. Each slot is separated by a tooth extending between neighboring slots. The knob is springloaded such that the knob is selectively depressed in order to move the knob between slots. Preferably, the handle includes first and second rows of longitudinally aligned slots.
The weightlifting system of the present invention enables the user to select a desired number of w
Dalebout William T.
Hald Patrick J.
Hammer Rodney
Dellenbach David B.
Icon Health & Fitness, Inc.
Mulcahy John
Richards Jonathan W.
Workman & Nydegger & Seeley
LandOfFree
Adjustable dumbbell and system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adjustable dumbbell and system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adjustable dumbbell and system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2486465