Muscle exercise device

A muscle exercise device comprising a hand grip, support means and resistance means, in which the hand grip has a longitudinal axis and is adapted to rotate on a rotation axis substantially half way along the longitudinal axis and normal to it, in which the support means rotatably carries the hand grip, and in which the resistance means acts against rotation of the hand grip on the rotation axis in at least one direction.

I claim the benefit under Title 35, United States Code, § 120 to British Patent Application Number 0400693.8, filed 13 Jan. 2004, entitled MUSCLE EXERCISE DEVICE.

This invention relates to a muscle exercise device for use particularly, but not exclusively, to supinate the forearm.

Muscles are exercised in order to improve strength or stamina for sport, or to condition them to improve cosmetic appearance. One of the most popular muscles to work on is the bicep at the front of the upper arm, whether for sport or looks.

However, current exercise machines and equipment do not provide the facility to exercise the bicep efficiently. The chief function of the bicep is to supinate the pronated forearm, and it only functions as a reserve muscle for elbow flexion. In other words, the bicep's primary function is to twist the wrist and turn the palms of the hands upwards. However, biceps are commonly exercised by means of elbow flexion, in other words the bringing of the hand towards the shoulder, when in actual fact it is the brachialis muscle behind the bicep which provides most of this movement.

It is known to use a dumbbell to perform an elbow flexion exercise, which involves lifting the dumbbell from adjacent the waist up to the shoulder. This exercise can involve forearm supination if the dumbbell is turned during the exercise.

However, an effective forearm supination exercise is not possible with a dumbbell, because the weights are carried on each side of the hand, and during the exercise the uppermost weight overbalances the dumbbell and assists the supination movement.

In addition, at the start of the above described elbow flexion exercise, a dumbbell can only conveniently be held sideways, with the forearm already half supinated, otherwise one side of the dumbbell hits the user's leg.

Further, as the weight is lifted up, the resistance is greater in the middle of the movement with the forearm extending outwards, and is less at the start and the finish.

The present invention is intended to overcome some of the above problems.

Therefore, according to the present invention a muscle exercise device comprises a hand grip, support means and resistance means, in which the hand grip has a longitudinal axis and is adapted to rotate on a rotation axis substantially half way along the longitudinal axis and normal to it, in which the support means rotatably carries the hand grip, and in which the resistance means acts against rotation of the hand grip on the rotation axis in at least one direction.

The resistance means can be weights which are mounted on a substantially vertical rack, such that they need to be lifted against the force of gravity.

Preferably the rotation axis of the hand grip can be substantially horizontal, and rotation of the hand grip on the rotation axis can be translated into substantially vertical lifting of said weights.

In one construction a winch drum can be mounted above the substantially vertical rack, and can be rotated by the hand grip. Further, a lifting band can extend from the drum and be connected to the weights, such that rotation of the winch drum winds the lifting band onto the winch drum and lifts the weights.

A ratchet device can be incorporated into the winch drum, such that rotation of the hand grip in a first direction turns the drum and lifts the weights, and rotation of the hand grip in the opposite direction does not turn the drum.

Preferably the hand grip can be disposed with the longitudinal axis parallel with the ground at the start, such that a user can grip the hand grip with their palm facing down, and then turn the hand grip through approximately 180 degrees to bring their palm uppermost and perform one supination action of the forearm. The hand grip can then be rotated back through 180 degrees in the opposite direction without the resistance of the weights applied.

It will be appreciated that these actions will result in the weights being lifted up in small increments during use, until they reach a top of the stack. Therefore, a mechanism can be provided for lowering the weights back down again. The ratchet can be released by any appropriate mechanism, and the weights can be lowered using a lowering handle attached to the drum. The lowering handle can be of sufficient dimensions to allow safe lowering of the weights by hand.

Alternatively, the ratchet can be reversible and the weights can be lowered in a reverse of the above described exercise action.

In a preferred construction the device can further comprise a frame, which comprises said vertical rack and said weights, and which carries the winch drum. In addition, the support means can comprise one portion of the frame.

The device can be provided with two hand grips, two support means, and two resistance means, one set for each hand. The two winch drums can turn in opposite directions, because supination of the forearm involves clockwise rotation of the right hand and ant-clockwise rotation of the left hand.

Therefore, the frame can carry both the hand grips and their associated parts. In addition the hand grips can be laterally spaced apart approximately the width of an average user's shoulders.

In addition, the distance between the two winch drums can be adjustable to accommodate users with different shoulder sizes. In a preferred construction the frame can comprise a beam mounted over the two weight stacks, and on which the winch drums are mounted. The position of the winch drums on the beam can be adjusted by means of a series of slots and an associated pin. The lifting band can be threaded through a slot disposed above the weight stack, such that if a winch drum is positioned away from the weight stack, the lifting band extends vertically from the weights, through the slot, and at an angle to the winch drum.

The frame can also comprise a seat, which is disposed in front of the hand grips, such that a user can readily grip the hand grips when seated on the seat. It will be appreciated that users may vary in size, so the seat can be provided with vertical adjustment means, and can be elongate in shape so the user can position themselves the correct distance from the hand grips.

The seat can be positioned such that in use, the user's arms are bent at the elbow approximately 90 degrees. This provides the optimum position to exercise the biceps.

As shown in the Figures, a muscle exercise device1comprises hand grips2, support means in the form of rods3and frame beam4, and resistance means in the form of weights5. The hand grips2have a longitudinal axis A-A (best shown inFIG. 5) and are adapted to rotate on a rotation axis B-B (best shown inFIG. 5) substantially half way along the longitudinal axis A-A and normal to it, in which the rods3rotatably carry the hand grips2, and in which the weights5act against rotation of the hand grips2on the rotation axis B-B in at least one direction.

The device1generally comprises a frame6comprising a rectangular base section7, a first upright frame section8and second upright frame section9. Seat10extends at the rear11of the base section7.

Two vertical weight stacks12and13are disposed under first upright frame section8, and both comprise guide posts14and individual weight units15. The stacks12and13function in the conventional manner and in use the units15above the unit with pin16slotted under it can be lifted.

Mounted on beam17of the first upright frame section8are winch units18and19. Both winch units18and19comprise a U-shaped base20which is seated on the beam17and has drum mounting uprights21and22. A drum23is mounted on an axle (not visible) mounted between the uprights21and22, and is provided with rim flanges24and25. The rod3is connected to the drum23via ratchet mechanism26. (Ratchet mechanism26is of a conventional arrangement and therefore further detail is not shown here. It generally comprises an annular cog and a locking member which can engage teeth on the cog. The locking member and the shape of the teeth allow the drum23to rotate in one direction only, unless the locking member is retracted against a spring which allows the cog to rotate freely.)

The ratchet mechanism26of winch unit18allows its drum23to be rotated in a clockwise direction, while the ratchet mechanism26of winch unit19allows its drum23to be rotated in an anti-clockwise direction.

To lower lifted weights back down onto the weight stacks12and13the ratchet mechanisms26are released and a lowering handle (not shown) is applied to the drum23by means of slot27. The user can then safely lower the lifted weights by rotating the handle.

The beam17is provided with two rows of slots28, which co-operate with slot29on the base20and pin30, and allow the winch units18and19to be spaced apart different amounts to suit the shoulder dimensions of the user.

Bands31extends from the weights5to the drums23, and in use the bands31are wound around the drums23as the weights5are lifted. The bands31extend through slots (not visible) in the beam17directly above the weights5. As a result when the winch units18and19are moved, the bands31still extend vertically from the weights, as shown clearly inFIG. 4.

In the arrangement shown inFIGS. 1 to 3, a portion of the bands31is wound around the drums23, such that when the winch units18and19are moved laterally on the beam17(as shown inFIG. 4) the bands31can unwind and allow the winch units18and19to move.

Second upright frame section9comprises beam4, through which rods3pass, and which supports rods3. Slots32are provided in the beam4to allow the rods3to be moved laterally with the winch units18and19to which they are attached.

The seat10comprises a leg33which is adjustable by means of slots34and pin35, and a platform36, which allows the user to position the platform36at the correct height to reach the hand grips2. The platform36is elongate in the same direction as the rotation axis B-B, which allows the user to position themselves a comfortable distance from the hand grips2.

As shown inFIG. 5, the hand grips2comprise are generally stirrup shaped, and gripping portion37and a loop portion38. The gripping portion37is shaped to receive a gripping hand, and loop portion38is connected to rod3.

Therefore, in use a user adjusts the height of the seat10such that the hand grips2can be gripped with the arm folded at approximately 90 degrees at the elbow. In addition, the user can space apart winch units18and19on the beam17so they correspond to the approximate width of the user's shoulders, such that when the user grips the hand grips2their arms extend substantially forward from their body. The user also places pins16at the desired place on the weight stacks12and13for the exercise they wish to perform.

The user grips the hand grips2with the palms of their hands facing downwards, and then rotates the hand grips2through approximately 180 degrees with each hand to perform one supination action. The user's right hand turns in a clockwise direction and the user's left hand turns in an anti-clockwise direction. This action is allowed by the ratchet mechanisms26in the winch units18and19. As a result the chosen weights5are lifted a small distance.

Then the user rotates their hands back through approximately 180 degrees in the opposite direction. The ratchet mechanisms26hold the weights5and the hand grips2can be rotated in this direction freely. This allows the user to return to the start of the exercise without performing a potentially damaging movement.

The above procedure is repeated until the user's biceps have been sufficiently worked, or the weights5have reached the top of the stacks12or13and contact the beam17.

The weights5can then be lowered by releasing the ratchet mechanisms26, and taking the strain with a lowering handle (not shown) which can be attached to the front of the drums23as described above.

It will be appreciated that the device1can be altered without departing from the spirit of the invention. For example, instead of weights a pneumatic or hydraulic ram could provide the resistance. Alternatively, the device could be wall-mounted rather than free standing. Further, the two stacks of weights could be replaced with one stack of weights to which both bands are attached.

Thus an exercise machine is provided which safely and correctly exercises the biceps by allowing complete supination of the forearm against a consistent resistance. Further, a device is provided with allows users of different heights and shoulder dimensions to exercise their biceps.