초록 ▼

The use of a pivotal coupling on a cart of the wheelbarrow type allows for a downwardly applied pressure to the user ends of the handles to tip the bucket to at least begin the dumping action of the cart. Following the initial downward pressure with the handles still elevationally displaced downward

The use of a pivotal coupling on a cart of the wheelbarrow type allows for a downwardly applied pressure to the user ends of the handles to tip the bucket to at least begin the dumping action of the cart. Following the initial downward pressure with the handles still elevationally displaced downward an upward lift applied to the user ends of the handles completes the dumping action of the cart. Use of multiple pivotal axises on the cart provide for an extremely efficient operation. Various enhancements are explained including locking of the orientation of the cart following the initial dump, wheel blocking to prevent rotation of the ground support wheel relative to the bucket during at least a portion of the final dumping action and stabilization enhancement to prevent lateral tipping of the cart during the final dumping action.

대표청구항 ▼

I claim: 1. A cart for dumping utilizing a downward pressure applied by a user, the cart comprising: a) a handle assembly having a user manipulation end and a distal end; b) a wheel assembly having a ground support wheel and a bucket, said ground support wheel having a rotational axis, said bucket

I claim: 1. A cart for dumping utilizing a downward pressure applied by a user, the cart comprising: a) a handle assembly having a user manipulation end and a distal end; b) a wheel assembly having a ground support wheel and a bucket, said ground support wheel having a rotational axis, said bucket fixedly positioned on said wheel assembly relative to said rotational axis of said ground support wheel; c) a ground contacting assembly contacting the ground while said cart is in a resting orientation and to provide for leveraging when said downward pressure is applied to said handle assembly at said user manipulation end; d) a pivotal coupling for pivoting of said handle assembly relative to a remainder of said cart; e) wherein an upward pressure is applied to said wheel assembly in close proximity to said bucket when said downward pressure is applied to said handle assembly at said user manipulation end utilizing a cooperation between said ground contacting assembly and said pivotal coupling wherein said bucket is dumped forward away from said user manipulation end of said handle assembly; (f) wherein said ground contacting assembly further comprises a ground contact portion and wherein said rotational axis of said ground support wheel of said wheel assembly has a resting spacing relative to said ground contact portion of said ground contacting assembly when said cart is in said resting orientation and wherein said rotational axis of said ground support wheel of said wheel assembly has a dumping spacing relative to said ground contact portion of said ground contacting assembly subsequent to said downward pressure being applied to said handle assembly at said user manipulation end and wherein said resting spacing is greater than said dumping spacing. 2. The cart defined in claim 1 wherein said ground contacting assembly has a first connection portion and a second connection portion and wherein said first connection portion connects to said wheel assembly and wherein said second connection portion connects to said handle assembly. 3. The cart defined in claim 1 further comprising a second pivotal coupling longitudinally spaced on said cart from said pivotal coupling, said second pivotal coupling pivoting said handle assembly relative to remainder of said cart. 4. The cart defined in claim 1 wherein said ground contacting assembly further comprises a ground contact portion and wherein said ground contact portion of said ground contacting assembly has a curvature thereon wherein a pressure bearing axis of said ground contacting assembly moves along said ground contact portion when the downward pressure is applied to said handle assembly at said user manipulation end. 5. The cart defined in claim 1 further comprising a locking device for selectively retaining said wheel assembly in a dumping orientation relative to said handle assembly subsequent to the downward pressure being applied to said handle assembly at said user manipulation end sufficient to displace said wheel assembly including said bucket to the dumping orientation. 6. A cart for dumping utilizing a downward pressure applied by a user, the cart comprising: a) a handle assembly having a user manipulation end and a distal end; b) a wheel assembly having a ground support wheel and a bucket, said ground support wheel having a rotational axis, said bucket fixedly positioned on said wheel assembly relative to said rotational axis of said ground support wheel; c) a ground contacting assembly contacting the ground while said cart is in a resting orientation and to provide for leveraging when said downward pressure is applied to said handle assembly at said user manipulation end; d) a pivotal coupling for pivoting of said handle assembly relative to a remainder of said cart; e) wherein an upward pressure is applied to said wheel assembly in close proximity to said bucket when said downward pressure is applied to said handle assembly at said user manipulation end utilizing a cooperation between said ground contacting assembly and said pivotal coupling wherein said bucket is dumped forward away from said user manipulation end of said handle assembly; (f) a stabilizing assembly positioned in close proximity to said ground support wheel, said stabilizing assembly contacting a ground surface in close proximity to said ground support wheel during some portion of a dumping procedure to prevent said cart from rolling forward along said ground surface utilizing said ground support wheel. 7. A cart for dumping utilizing a downward pressure applied by a user, the cart comprising: a) a handle assembly having a user manipulation end and a distal end; b) a wheel assembly having a ground support wheel and a bucket, the ground support wheel having a rotational axis, the bucket fixedly positioned on the wheel assembly relative to the rotational axis of the ground support wheel; c) a coupling assembly having a ground contact portion to contact the ground while the cart is in a resting orientation and to provide leveraging when the downward pressure is applied to the handle assembly at the user manipulation end; d) a first pivotal coupling between the coupling assembly and the handle assembly; e) a second pivotal coupling between the coupling assembly and the wheel assembly, the second pivotal coupling fixedly spaced from the rotational axis of the ground support wheel of the wheel assembly; f) linking device to provide for the handle assembly in close proximity to the distal end to apply an upward pressure to the wheel assembly in close proximity to the bucket when the downward pressure is applied to the handle assembly at the user manipulation end utilizing a cooperation between the ground contact portion of the coupling assembly, the first pivotal coupling and the second pivotal coupling wherein the bucket is dumped forward away from the user manipulation end of the handle assembly; g) wherein the rotational axis of the ground support wheel of the wheel assembly has a resting spacing relative to the ground contact portion of the coupling assembly when the cart is in the resting orientation and wherein the rotational axis of the ground support wheel of the wheel assembly has a dumping spacing relative to the ground contact portion of the coupling assembly subsequent to the downward pressure being applied to the handle assembly at the user manipulation end and wherein the resting spacing is greater than the dumping spacing. 8. The cart defined in claim 7 wherein the linking device further comprises a sliding engagement between the handle assembly and the wheel assembly. 9. The cart defined in claim 7 wherein the linking device further comprises an arcing engagement between the handle assembly and the wheel assembly. 10. The cart defined in claim 7 further comprising ground support wheel rotation blocking device to provide for preventing rotation of the ground support wheel relative to the bucket during at least a portion of a dumping procedure. 11. The cart defined in claim 7 further comprising a locking device for selectively retaining the wheel assembly in a dumping orientation relative to the handle assembly subsequent to the linking device applying the upward pressure to the wheel assembly sufficient to displace the wheel assembly including the bucket to a dumping orientation.