Abstract: Disclosed is a dumbbell weight training device having a high strength handle assembly adapted to resist damage in the event that the dumbbell is dropped from high above the ground. The handle assembly includes first and opposite disc-shaped collars to which first and second stacks of weight plates are attached. A lifting handle to which a lifting three is applied and a pair of handle reinforcing rods extend in parallel alignment with e another between the first and opposite disc-shaped collars of the handle assembly. The lifting handle and the pair of handle reinforcing rods are arranged in a triangular configuration between the disc-shaped collars. When it is not in use, the dumbbell can be laid on and retained within a dumbbell storage tray having rests upon which the first and second stacks of weight plates and the first and opposite disc-shaped collars are seated.

Abstract: Disclosed is a dumbbell to be used during a weight lifting exercise program. The dumbbell includes a handle assembly and a pair of collars connected at opposite sides of the assembly. First and second sets of weight plates are detachably connected to each other and to the pair of collars. Each weight plate has an electric motor carried in a cavity formed therein. The dumbbell is seated in a portable dumbbell tray which includes a touch activated display at which a user can enter a predetermined weight to be lifted by the dumbbell during his exercise. The dumbbell tray also has a processor and a motor controller by which the electric motors of respective weight plates are selectively activated to cause the weight plates to be connected together to correspond with the weight entered by the user at the display.

Abstract: A dumbbell to be used as a weight training device during an exercise program. The dumbbell includes a gripping handle and a pair of collars connected to opposite ends of the handle. A series of weight plates having different weights are selectively and detachably connected to each other and to the pair of the collars so as to enable a user to incrementally adjust the gross weight of the dumbbell to conform to his exercise program. Each weight plate has a recessed V-shaped coupling slot formed in one face thereof and a V-shaped coupling body projecting from the opposite face. The V-shaped coupling body of a first weight plate being carried by the dumbbell is aligned with and guided into receipt by the V-shaped coupling slot of an adjacent additional weight plate so that the first and additional weight plates can be detachably connected together.

Abstract: Disclosed is a dumbbell to be used during a weight lifting exercise program. The dumbbell includes a handle assembly and a pair of collars connected at opposite sides of the assembly. First and second sets of weight plates are detachably connected to each other and to the pair of collars. Each weight plate has an electric motor carried in a cavity formed therein. The dumbbell is seated in a portable dumbbell tray which includes a touch activated display at which a user can enter a predetermined weight to be lifted by the dumbbell during his exercise. The dumbbell tray also has a processor and a motor controller by which the electric motors of respective weight plates are selectively activated to cause the weight plates to be connected together to correspond with the weight entered by the user at the display.

Abstract: Disclosed is a dumbbell to be used as a weight training device during an exercise program. The dumbbell includes a gripping handle and a pair of collars connected to opposite ends of the handle. A series of weight plates having different weights are selectively and detachably connected to each other and to the pair of the collars so as to enable a user to incrementally adjust the gross weight of the dumbbell to conform to his exercise program. Each weight plate has a recessed V-shaped coupling slot formed in one face thereof and a V-shaped coupling body projecting from the opposite face. The V-shaped coupling body of a first weight plate being carried by the dumbbell is aligned with and guided into receipt by the V-shaped coupling slot of an adjacent additional weight plate so that the first and additional weight plates can be detachably connected together.

Abstract: A machine by which to enable a user to exercise his biceps by applying lifting forces to a pair of handles that are located at opposite sides of shrouded weight plate retention housing. Each lifting arm of the machine is coupled by way of a lifting cable to a respective weight plate carriage. Each weight plate carriage is responsive to a vertical uplifting force applied thereto by the lifting cable to lift a plurality of weight plates that are arranged in parallel side-by-side alignment in a horizontal direction. The plurality of weight plates have different lengths and correspondingly different weights (e.g., from 5 to 20 pounds). Each weight plate has a locking cartridge connected thereto. By pushing control knobs of the locking cartridges, some or all of the weight plates can be selectively connected to the weight plate carriage to be lifted thereby.

Abstract: A machine is disclosed by which to enable a user to exercise his biceps by applying lifting forces to a pair of handles that are located at opposite sides of shrouded weight plate retention housing. Each lifting arm of the machine is coupled by way of a lifting cable to a respective eight plate carriage. Each weight plate carriage is responsive to a vertical uplifting three applied thereto by the lifting cable to lift a plurality of weight plates that are arranged in parallel side-by-side alignment in a horizontal direction. The plurality of weight plates have different lengths and correspondingly different weights (e.g., from 5 to 20 pounds). Each weight plate has a locking cartridge connected thereto. By pushing control knobs of the locking cartridges, some or all of the weight plates can be selectively connected to the weight plate carriage to be filled thereby.

Abstract: A weight plate for physical fitness weight lifting equipment so that the weight plate may be coupled to other weight plates and lifted in a stack. The weight plate includes a pivotal switch arm having a first end at which to receive a pushing force to cause the switch arm to rotate and an opposite end at which a fork is carried. A post runs through a center bore hole of the weight plate. The weight plate also includes an intermediate channel and a locking cavity that are aligned with one another at opposite sides of the bore hole. When the pivotal switch arm is rotated to a locked position, the fork is rotated through the intermediate channel, into surrounding engagement with the center post, and completely through the bore hole for receipt by the locking cavity by which the weight plate is reliably coupled to the post.

Abstract: A weight plate for physical fitness weight lifting equipment so that the weight plate may be coupled to other weight plates and lifted in a stack. The weight plate includes a pivotal switch arm having a first end at which to receive a pushing force to cause the switch arm to rotate and an opposite end at which a fork is carried. A post runs through a center bore hole of the weight plate. The weight plate also includes an intermediate channel and a locking cavity that are aligned with one another at opposite sides of the bore hole. When the pivotal switch arm is rotated to a locked position, the fork is rotated through the intermediate channel, into surrounding engagement with the center post, and completely through the bore hole for receipt by the locking cavity by which the weight plate is reliably coupled to the post.

Abstract: A weight plate for use with physical fitness weightlifting equipment so that the weight plate may be coupled to other weight plates and lifted together in a stack. Each weight plate includes a pivotal switch arm including a first end at which to receive a pushing force to cause the switch arm to rotate relative to the weight plate and an opposite end at which a curved fork is carried. In one embodiment, a center post runs continuously through the center bore holes of the weight plates. In another embodiment, an insert is located in the center bore hole of each weight plate to be mated to the insert from an adjacent plate. When the pivotal switch arm of any weight plate is rotated to a locked position, the curved fork is rotated with the switch arm into surrounding engagement with the center post or the insert.

Abstract: A weight plate for use with physical fitness weightlifting equipment so that the weight plate may be coupled to other weight plates and lifted together in a stack. Each weight plate includes a pivotal switch arm including a first end at which to receive a pushing force to cause the switch arm to rotate relative to the weight plate and an opposite end at which a curved fork is carried. In one embodiment, a center post runs continuously through the center bore holes of the weight plates. In another embodiment, an insert is located in the center bore hole of each weight plate to be mated to the insert from an adjacent plate. When the pivotal switch arm of any weight plate is rotated to a locked position, the curved fork is rotated with the switch arm into surrounding engagement with the center post or the insert.

Abstract: Weight plate locking and lifting systems by which one or more weight plates are detachably connected to a lifting handle bar to enable the weight plates to be removed from or returned to a nearby storage rack without having to lift, transport and handle the weight plates. Each weight plate includes a toggle lever switch arm that is coupled to a locking pin. Each weight plate also includes a radially-extending locking cavity within which to removably receive the lifting handle bar. When the toggle lever switch arm is moved to a locked position, the locking pin slides in a first direction through the weight plate and into engagement with the lifting handle bar within the locking cavity. When the toggle lever switch arm is moved to an unlocked position, the locking pin slides in an opposite direction out of engagement with the lifting handle bar.

Abstract: A weight plate having a detachable locking cartridge by which the weight plate is releasably connected to a lifting element (e.g., a center post) whereby one or more weight plates carried by the lifting element may be lifted by a user. The weight plate also has a plate body with a central bore in which to receive the lifting element. In one embodiment, the detachable locking cartridge is mounted flush against one side (e.g., the bottom) of the weight plate body so as to lie entirely external to the plate body. In an alternate embodiment, the detachable locking cartridge includes a stabilizer extension that is received within a cavity recessed in the one side of the plate body. The detachable locking cartridge includes a manually-accessible toggle lever switch arm that is adapted to rotate within a housing of the cartridge between locked and unlocked positions to thereby control the displacement of a locking pin relative to the lifting element within the central bore of the plate body.

Abstract: Weight plate locking and lifting systems by which one or more weight plates are detachably connected to a lifting handle bar to enable the weight plates to be removed from or returned to a nearby storage rack without having to lift, transport and handle the weight plates. Each weight plate includes a toggle lever switch arm that is coupled to a locking pin. Each weight plate also includes a radially-extending locking cavity within which to removably receive the lifting handle bar. When the toggle lever switch arm is moved to a locked position, the locking pin slides in a first direction through the weight plate and into engagement with the lifting handle bar within the locking cavity. When the toggle lever switch arm is moved to an unlocked position, the locking pin slides in an opposite direction out of engagement with the lifting handle bar.

Abstract: A weight plate lifting exercise apparatus to enable any number of weight plates to be lifted off a stack of weight plates during an exercise. The weight plates are stacked in face-to-face alignment one above the other. A weight plate connector is affixed to the first weight plate atop the stack. The apparatus includes a frame and a pair of guide bars that are pivotally connected between a side of the frame and the weight plate connector. A cable communicates with the first weight plate atop the stack by way of the weight plate connector. A pulling force applied to the cable causes the first weight plate and any other weight plates that are detachably interconnected to the first weight plate to be displaced in a linear (i.e., vertical) lifting path. At the same time, the pair of guide bars will rotate relative to the frame through a circular path.

Abstract: A weight plate having a detachable locking cartridge by which the weight plate is releasably connected to a lifting element (e.g., a center post) common to physical fitness weight lifting equipment, whereby one or more weight plates carried by the lifting element may be lifted by a user. The weight plate also has a plate body with a central bore in which to receive the lifting element. In one embodiment, the detachable locking cartridge is mounted flush against one side (e.g., the bottom) of the weight plate body so as to lie entirely external to the plate body. In an alternate embodiment, the detachable locking cartridge includes a stabilizer extension that is received within a cavity recessed in the one side of the plate body.

Abstract: A weight plate for use with physical fitness equipment is disclosed including a plate body with a centrally located locking connector and two outwardly disposed throughbores. The body additionally has an internal bore within the thickness of the plate body which communicates with the locking connector. A selector pin is movably mounted within the internal bore to selectively engage the plate body to a locking connector in an adjacent weight plate. A toggle lever is mounted in a cartridge mounted within the weight plate to selectively position the selector pin.

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: Disclosed is a dumbbell to be used during a weight lifting exercise program. The dumbbell includes a handle assembly and a pair of collars connected at opposite sides of the assembly. First and second sets of weight plates are detachably connected to each other and to the pair of collars. Each weight plate has an electric motor carried in a cavity formed therein. The dumbbell is seated in a portable dumbbell tray which includes a touch activated display at which a user can enter a predetermined weight to be lifted by the dumbbell during his exercise. The dumbbell tray also has a processor and a motor controller by which the electric motors of respective weight plates are selectively activated to cause the weight plates to be connected together to correspond with the weight entered by the user at the display.