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.

Abstract: A dumbbell weight selection structure includes an extension rod disposed at any end of a handle unit. The extension rod is disposed with a selection unit, which contains a selection mechanism and multiple weight plates are disposed thereon. The selection mechanism includes a slide plate linked to drive the selection plate set to travel. A locking hole to insert by the selection plate set is disposed at where appropriately on each weight plate. The slide plate is moved to change connection of the selection plate set corresponding to the locking holes of multiple weight plates to select quantity of weight plates to be attached to the dumbbell as desired for achieving discretional adjustment of the overall weight of the dumbbell.

Abstract: An adjustable-weight exercise apparatus include a rod with opposing end sections defining bearing surfaces, a first shallow channel without ribs, and a second shallow channel with ribs. The weights each include a hub shaped to telescopingly slide onto ends of the rod. Each hub further includes opposing flexible fingers with tips configured to slide along the second shallow channel when in a first rotational orientation during assembly of the weights onto the rod, and configured to flex over a raised detent into engagement with the second shallow channel between the ribs when the weight is rotated.

Abstract: An exercise device comprising a bar, a weight assembly, an end plate and a securing member. The bar comprises an end portion onto which the weight assembly is mounted. The securing member co-operates with the end plate to secure the weight assembly to the end portion of the bar. The end plate is rotationally fixed relative to the weight assembly to mitigate against loosening of the securing member during use.

Abstract: A selector of a selectorized dumbbell comprises a keyboard having a plurality of keys that can be depressed into a weight selecting position. In this weight selecting position, a cam actuator on each key forces a pair of connecting pins apart to couple a particular weight to the handle. Preferably, to minimize the risk of accidental weight detachment from the handle, a pair of keys and two pairs of connecting pins couple each weight to the handle in a redundant fashion. The pins in each pair slide apart from one another to couple a weight to the handle and slide towards one another to uncouple a weight from the handle with the sliding motion of the pins being perpendicular to the axis of a hand grip of the handle.

Abstract: A retention collar for securing weights to a barbell that includes two side plates with a pull bar and a cam lever. Two sets of pressure pins provide a frictional fit with the barbell when the collar is in its closed position, which is achieved by use of the am lever. The side plates are secured to each other by screws or rivets.

Abstract: At least one set of weights is arranged into a stack for selective connection to a weight lifting member. On some embodiments, a vertical stack of weights is disposed beneath the weight lifting member, and at least one selector rod is rotatably mounted on the weight lifting member and selectively rotated into engagement with a desired number of the vertically stacked weights. On some embodiments, a horizontal stack of weights is disposed on opposite sides of the weight lifting member, and at least one selector rod is movably mounted on the weight lifting member and selectively moved into engagement with the desired number of horizontally stacked weights. The horizontal stack of weights may be used to supplement the vertical stack of weights, or on an independent exercise device, such as a dumbbell.

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.

Abstract: A barbell collar apparatus features an elastomeric, flexible cylinder with a magnetic inner and an outer layer. Magnets are disposed adjacent to the inner layer, in various arrangement embodiments, to selectively secure the apparatus to a bar, typically disposed immediately adjacent to weights chosen, so that weights are retained against shifting and slippage along the bar. The apparatus is spread apart as needed for installation and removal from a bar. The apparatus is provided in pairs. The apparatus is provided in various colors to be easily identified and located. The light weight of the apparatus provides that additions to the weight and bar are negated in figuring the total weight lifted.

Abstract: Disclosed is a dumbbell of the type commonly found in a fitness center to be used as a weight training device during a weight training or exercise program. The dumbbell includes a gripping handle and a pair of collars fixedly connected to opposites ends of the handle. A series of weight plates having correspondingly different weights are adapted to be detachably connected to each other and to each one of the collars so as to enable a user to selectively and incrementally adjust the gross weight of the dumbbell to conform to his weight training program. Each weight plate carries a lock cartridge having an engagement pin moving therethrough between retracted and extended positions in response to a manual pushing force. In the extended position, the engagement pin of an additional weight plate is received within an engagement pin extension channel of an existing weight plate being carried by the dumbbell, whereby to prevent a disconnection of the additional weight plate from the existing weight plate.

Abstract: A magnetically dumbbell device and method are disclosed. The dumbbell device has a central base unit with at least one magnetic piece at each end of the base unit and one or more weights attachable to the ends of the base unit by means of magnetic force.

Abstract: A weight-adjustable dumbbell includes a dumbbell shell unit, a weight unit, and an insert pin unit. The dumbbell shell unit includes a shell body confining a receiving space, and a weight selector rod connected to the shell body, extending into the receiving space, and formed with through holes registered with insert holes in the shell body. The weight unit is extended removably into the receiving space via an open bottom of the shell body, and includes a base member provided with two positioning posts, and weight pieces stacked on the base member. Each weight piece is formed with a rod hole for extension of the weight selector rod, and two post holes for extension of the positioning posts. The insert pin unit includes an insert pin inserted removably into a selected insert hole and extending removably through a corresponding through hole in the weight selector rod.

Abstract: A dumbbell system is provided including a base weight member and a handle rotatably attached to the base weight member. A plurality of added weights are adapted to be removably mounted to the base weight member in order to provide a compact dumbbell system which has the capability of providing several weight increments in a compact assembly. The dumbbell system is ideal for use in areas where space is limited.

Abstract: A handle has opposed ends and a central extent. A grip rotationally receives the central extent of the handle. An adjustment wheel is secured to each end of the handle. A side cover is fixedly secured to each end of the grip. A dowel disk is on the handle adjacent to one side cover with fingers and spaces. A plurality of cam bits are supported on the handle. A safety lock is within the side cover adjacent to the dowel disk. The safety lock has a first end extent and a second end extent with a radial recess and a central extent with an axial projection. A coil spring within the radial recess urges the safety lock radially outwardly.

Abstract: A selectorized dumbbell has a handle that can be inserted into a gap between stacks of nested left and right weight plates that are provided in a plurality of nested weights. A selector determines how many left weight plates are coupled to the left end of the handle and how many right weight plates are coupled to the right end of the handle. A single left weight plate and a single right weight plate are interconnected together by an interconnection member of some type to form a single weight. The interconnection members of the different weights overlie one another and are provided with two arrays of a plurality of unique sets of holes and slots. A first connecting pin is inserted through the handle and through a selected set of holes and slots in the first array. A second connecting pin is inserted through the handle and through a selected set of holes and slots in the second array. The two pins together symmetrically couple the desired number of weights to the handle in a balanced fashion.

Abstract: A weightlifting device includes a handle member, an adjustable member, a set of weight plates, and a restricting unit. The handle member has a tubular end portion. The adjustable member extends into the end portion of the handle member, and is movable axially relative to the handle member. The weight plates are attached removably to the adjustable member. The restricting unit is operable so as to arrest and permit axial movement of the adjustable member relative to the handle member.

Abstract: Methods and systems for forming a photodiode in a substrate, forming a source/drain region in the substrate and extending over at least a portion of the photodiode, and growing a thermal oxide layer over the photodiode by performing a rapid thermal anneal (RTA) process utilizing an oxidizing environment.

Abstract: A retention collar for securing weights to a barbell that includes two side plates with a pull bar and a cam lever. Two sets of pressure pins provide a frictional fit with the barbell when the collar is in its closed position, which is achieved by use of the am lever. The side plates are secured to each other by screws or rivets.

Abstract: An exercise dumbbell includes a handle member and weight plates maintained in spaced relationship at opposite ends thereof. Knobs on the handle member have contoured bearing surfaces that bear against respective selector members to alternatively hold the selector members in weight engaging positions and disengaged positions.

Abstract: A dumbbell includes: a hollow grip bar having a connecting end; a weight adjusting mechanism including a screw rod extending into the grip bar and operable to rotate relative to the grip bar about a rotation axis, and a weight carrier extending into the grip bar and engaging threadedly the screw rod so as to be movable axially upon rotation of the screw rod about the rotation axis, the weight carrier having a weight-supporting part extending outwardly through the connecting end of the grip bar; and a plurality of weights, each of which is formed with an elongate notch having an enlarged central portion for extension of the weight-supporting part of the weight carrier therethrough.

Abstract: An exercise device used to provide resistance to the contraction of a muscle during weight lifting. The exercise device consists of a handle with two weighted members connected on opposing ends of the handle. The weighted members are connected through a press fit manufacturing technique. Each opposing end of the handle has at least one channel about the periphery of the handle ends that is used to collect metal shavings generated during the press fit manufacturing process. By collecting the metal shavings, a connection that not only has a tight tolerance, but also has few imperfections at the interface between the flushed surfaces is created.

Abstract: An adjustable dumbbell includes a shaft provided with left- and right-handed threads, two tubes sleeved around and engaging threadedly and respectively the left- and right-handed threads, a hollow grip rod sleeved on the tubes, two support units each having upper and lower support seats disposed above and below one of the tubes, and a plurality of weights each having an engaging hole section engageable with a corresponding tube. Two adjustment knob units are respectively connected to two connecting ends of the shaft to turn the shaft and to thereby move the tubes in opposite directions towards or away from the connecting ends. Each tube is movable between the support seats to selectively engage one or more engaging hole sections of the weights.

Abstract: A weightlifting device includes a handle member, an elongated adjustable member, a set of weight plates, and an elongated limiting member. The handle member has a tubular end portion. The adjustable member extends into the end portion of the handle member and is movable axially relative to the handle member. Each of the weight plates is sleeved around the adjustable member. The limiting member extends through the weight plates to thereby prevent rotation of the weight plates relative to each other.

Abstract: One embodiment of the Adjustable-Solid Dumbbell having a hitch pin (20) which joins with dumbbell shaft (22). The assembly produces a preferred method of retaining add on weight plates (not shown) on a dumbbell shaft. The proposed dumbbell shaft having multiple holes enables the use of a selected number of add on weight plates. A dumbbell body is constructed in a way which attaches a specific weight. The Adjustable-Solid Dumbbells can be manufactured in different sizes to accommodate multiple weight ranges. Other embodiments are described and shown.

Abstract: An exercise dumbbell includes a handle member and weight plates maintained in spaced relationship at opposite ends thereof. Knobs on the handle member have contoured bearing surfaces that bear against respective selector members to alternatively hold the selector members in weight engaging positions and disengaged positions.

Abstract: A dumbbell adjusting system method comprises an adjusting system, a stand, and a locking mechanism. The adjusting system includes two rods on the dumbbell's handle which move in and out of the handle to selectively engage the inner threaded through holes of the weights. The weights are configured to interlock with one another so as not to move independently. The locking mechanism unlocks the weights from the handle when the dumbbell is in the stand, allowing the user to select the desired weight, and locks the weights into the handle when the dumbbell is lifted out of the stand.

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.

Abstract: A weight bar for use with a dumbbell having an externally-threaded end is provided that includes a substantially cylindrical elongated bar having a longitudinal axis, first and second axial ends and an intermediate section extending between the axial ends. The first and second axial ends each comprise internally-threaded sections disposed substantially along the longitudinal axis of the weight bar for threadably receiving an externally-threaded end of a dumbbell. The internally-threaded sections of the first and second axial ends each comprise threads having substantially flat thread ends.

Abstract: A dumbbell includes: a hollow grip bar having a connecting end; a weight adjusting mechanism including a screw rod extending into the grip bar and operable to rotate relative to the grip bar about a rotation axis, and a weight carrier extending into the grip bar and engaging threadedly the screw rod so as to be movable axially upon rotation of the screw rod about the rotation axis, the weight carrier having a weight-supporting part extending outwardly through the connecting end of the grip bar; and a plurality of weights, each of which is formed with an elongate notch having an enlarged central portion for extension of the weight-supporting part of the weight carrier therethrough.

Abstract: This invention relates to a selectorized dumbbell having a handle that can be dropped down between nested left and right stacks of weight plates. The weight plates can comprise individual weights or a pair of weight plates, one from each stack, can be connected together to form a single weight. A selector is provided to allow the user to select a desired number of weight plates from each stack and couple such weight plates to the handle to provide an adjustable weight dumbbell. Each weight plate comprises a pair of thinner or partial thickness weight subplates that are abutted and welded together, e.g. a ½? weight plate is formed by a pair of ¼? weight subplates. This substantially decreases the cost of manufacturing the selectorized dumbbell.

Abstract: A selectorized dumbbell has a handle that can be inserted into a gap between stacks of nested left and right weight plates. A selector determines how many left weight plates are coupled to the left end of the handle and how many right weight plates are coupled to the right end of the handle. Each weight plate is held between a pair of flexible arms on a forked carrier. The arms allow the weight plates to deflect out of a normal, substantially upright, orientation if an impact shock is delivered to the dumbbell. The arms are restored to their normal orientation once the impact shock dissipates. This allows the impact shock to be absorbed without damaging the dumbbell or while minimizing damage to the dumbbell.

Abstract: A selectorized dumbbell has a selector for coupling a desired number of weights from an array of nested weights to the handle of the dumbbell to select or determine the exercise mass of the dumbbell. The selector comprises a keyboard having a plurality of keys that can be depressed into a weight selecting position. In this weight selecting position, a cam actuator on each key forces a pair of connecting pins apart to couple a particular weight to the handle. A separate weight selection key is provided for each pair of connecting pins. At least one pair of connecting pins is provided for individually coupling each weight to the handle. Preferably, to minimize the risk of accidental weight detachment from the handle, a pair of keys and two pairs of connecting pins couple each weight to the handle in a redundant fashion.

Abstract: A weightlifting apparatus is operative to continuously provide and adjust a force resistant to a torque produced by an exerciser that performs supination of biceps simultaneously with other exercise motions or pronation of triceps simultaneously with other exercise motions.

Abstract: An exercise apparatus includes first and second handles that fit within a user's hands and are formed from non-porous and water impermeable material. Each handle has a medially disposed end provided with a disc-shaped region and a central cylindrical region. The central region is intercalated between first and second disc-shaped regions and has a diameter smaller than corresponding diameters of the disc-shaped regions. Elongated and hollow shafts have lateral ends conjoined with the medial ends of the handles. The shafts have coextensive lengths and arcuate shapes. The lateral end is conjoined to the handles. A mechanism is included for attaching the shafts together such that the second shaft partially slides into the first shaft. Portable weight members are attached to the handles, against the central regions. A helical spring member is housed within one handle and abuts the first shaft, providing a resistive force against which the shaft is engaged.

Abstract: A dumbbell and incremental weight plate for same are disclosed herein comprising a bar that extends generally axially between opposing end regions, a weight plate mass mounted about the bar at each end region, and at least one incremental weight plate mountable on said weigh plate mass. One of the weight plate mass and incremental weight plate has at least a pair of such regions with a north magnetic pole and a south magnetic pole. The other of the weight plate mass and incremental weight plate has at least one magnetic region constituting a magnetic pole.

Abstract: A dumbbell having weight plates onto which magnetically coupled incremental weight plates can be securely mounted comprises a bar, weights at the end regions of the bar, means for retaining the weight plates at the respective ends to define a handle region therebetween, and a sleeve of generally annular cross-section securely mounted about the bar at least one end region axially outward from the weight plate, said sleeve member having (a) a hub portion for accommodating the through-opening of a weight plate, and (b) a flange portion of greater exterior dimension than the hub portion and having at least one magnetically-responsive region for magnetically securing an incremental weight to the dumbbell when said incremental weight plate is mounted about said hub region. In accordance with the invention, an adaptor to convert conventional dumbbells to utilize magnetically-coupled incremental weight plates comprises elements (a) and (b) above.

Abstract: An exercise device for weightlifting or weight training for use with resistance type weightlifting exercises. The device is a V-shaped, solid, weighted exercise bar with two wings and an apex. The wings contain handle grips and are capable of having weight plates, discs and collars attached. The apex contains a projecting post that extends in an outward direction and holds weight, whereby the weight balances and counterbalances the weight on the wings. The total weight on the apex can be heavier, lighter or equal to the total weight on the wings. In a preferred embodiment of the invention, the apex and wings are capable of accepting standard weight plates and discs using conventional weightlifting collars to hold the weights in place. In an alternative embodiment the apex and wings are permanently set with weights. Included are corresponding weight training methods for use with the exercise device.

Abstract: A method of manufacturing an exercise device, includes the steps of providing a bar having an end portion; providing a collar for receiving the end portion; forming a weight section about the collar to form a weight assembly including a weight section and a collar; mounting the weight assembly on the end portion; providing a first securing member; and securing the weight assembly to the bar using the first securing member. The weight section is formed about the collar by casting.

Abstract: 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. The weight selecting members rotate into and out of notches associated with any combination of the weight plates.

Abstract: An exercise dumbbell includes a handle member and weight plates maintained in spaced relationship at opposite ends thereof. Weight selectors are rotatable 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 occupy respective upwardly closed notches in the weights to secure the weights to the handle member. Different arrangements may be used to bias the weight selectors toward desired orientations relative to the weight plates, and/or to lock the weight selectors in desired orientations relative to the weight plates.

Abstract: On some embodiments, a vertical stack of weights is disposed beneath a base member, and at least one selector rod is rotatably mounted on the base member and selectively rotated into engagement with a desired number of the vertically stacked weights. On other embodiments, a horizontal stack of weights is disposed on opposite sides of a base member, and at least one selector rod is movably mounted on the base member and selectively moved into engagement with the desired number of horizontally stacked weights. On still other embodiments, these two types of arrangements are implemented in combination. Various methods may be performed using various combinations of these arrangements to provide adjustable resistance to exercise. In one such method, a base member is lifted by grasping a handle that extends longitudinally between first and second weight engaging ends of the base member.

Abstract: A dumbbell is described including a handle having a grip and at least one end, an inner plate mounted on the handle adjacent the grip, in a fixed rotational orientation, a support plate rotationally mounted on the handle adjacent the inner plate, at least one collar rotationally mounted on the handle adjacent the support plate, and rotationally fixed with the support plate, a selector knob rotationally mounted on the handle adjacent the at least one collar, and rotationally fixed with the collar, a weight plate removably mounted on the handle adjacent the at least one collar, and a means for selectively securing the support plate to the inner plate to resist the rotation of the support plate, collar and selector knob with respect to the inner plate and handle.

Abstract: An exercise device comprising a bar, a weight assembly, an end plate and a securing member. The bar comprises an end portion onto which the weight assembly is mounted. The securing member co-operates with the end plate to secure the weight assembly to the end portion of the bar. The end plate is rotationally fixed relative to the weight assembly to mitigate against loosening of the securing member during use.

Abstract: An exercise dumbbell includes a handle member and weight plates maintained in spaced relationship at opposite ends thereof. Knobs on the handle member have contoured bearing surfaces that bear against respective selector members to alternatively hold the selector members in weight engaging positions and disengaged positions.

Abstract: An exercising apparatus which comprises first and second sets of weights, each of which has an opening extending inwardly from a periphery thereof defined by opposed surfaces. An elongated tubular assembly is provided which has a longitudinal axis and includes exterior surfaces constructed and arranged to provide a central surface area configured to be manually engaged by a user and first and second surface areas on opposite sides of the central surface area configured to enter the openings of the first and second sets of weights into operative positions therein. The tubular assembly includes first and second sets of locking elements mounted within the first and second surface areas thereof for movement between weight releasing positions disposed within their respective first and second surface areas and weight locking positions extending partially outwardly of the respective first and second surface areas. The opposed surfaces of the weights have lock element receiving recesses therein.

Abstract: An adjustable dumbbell device includes a handle, a number of weights each having a channel to slidably receive an end portion of the handle, and a latch slidably engaged onto the end portion of the handle and engageable into the channels of a selected number of the weights, to secure the selected number of the weights to the end portion of the handle. A securing device may be used for securing the latch to the end portion of the handle, and includes one or more beams attached to the end portion of the handle, and a spring biasing catch may catch the latch to the beams or the end portion of the handle.

Abstract: A barbell comprises a bar with a receptacle at each end of the bar. The receptacle is configured to receive a selectorized dumbbell therein. The dumbbell is placed into the receptacle in a first loaded condition with a plurality of weights being coupled to the dumbbell. After such placement, the dumbbell can be adjusted to a second loaded condition in which the dumbbell carries fewer weights than in the first loaded condition. The dumbbell is then removed from the receptacle while in the second loaded condition to thereby leave behind at least one weight in the receptacle. Alternatively, the dumbbell in its first loaded condition can simply be left in its entirety in the receptacle. A lock can be provided on the receptacle to help retain within the receptacle either the dumbbell or the weights left behind in the receptacle. Thus, at least portions of selectorized dumbbells provide exercise mass for the barbell.

Abstract: A dumbbell including a tubular handle with a thread on the inside surface of the tube. A straight groove that cuts through the internal thread is also formed on the inside surface of the tubular handle. A stop plate is mounted on each end of the tubular handle. A pair of retainers are provided, each retainer being a shaft with a retainer plate on one end. Each shaft has a partial thread on its outside surface extending the length of the respective shaft. A weight plate stack is mounted on the shaft and the shaft is securely inserted into the tubular handle by aligning the partial thread with the groove, sliding the shaft through openings in the weight plates into the tubular handle, then rotating each shaft to where the partial thread on the shaft engages the interior thread of the tubular handle.

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. Adjustable resistance to exercise is provided by rotatably mounting individual weight selectors on a bar, moving the bar into alignment with a group of weights, and rotating respective weight selectors into engagement with desired weights.

Abstract: A weight lifting device includes a handle having two end segments, a number of weight members each having a slot to receive either of the end segments of the handle, and an anchor plate rotatably attached to each of the weight members and having an opening selectively aligned with the slot of the weight member, to selectively receive either of the end segments of the handle. The anchor plate is rotatable relative to the weight member to offset the opening of the anchor plate from the slot of the weight member, and to selectively anchor the weight member to the handle. The desired number of weight members may thus be selectively attached to the handle.