Patent ID: 7044313

Claim:
A portable hoist, comprising: a base; a first pair of legs coupled with the base, the first pair of legs comprising: a first leg having a top end, a bottom end, and a first foot rotatably attached to the bottom end of the first leg; a second leg having a top end, a bottom end, and a second foot rotatably attached to the bottom end of the second leg; a first screwing mechanism having a first end and a second end disposed between the first leg and the second leg, wherein the first end of the first screwing mechanism is attached to the top end of the first leg and the second end of the first screwing mechanism is attached to the top end of the second leg and the first screwing mechanism is located above the base, wherein rotation of the first screwing mechanism in a first direction causes the top end of the first leg to be moved apart from the top end of the second leg while the first foot attached to the bottom of the first leg is moved towards the second foot attached to the bottom of the second leg, and rotation of the first screwing mechanism in a direction opposite the first direction causes the top ends of the first and second legs to be moved together while the first and second feet attached to the bottom ends of the first and second legs are moved apart; a second pair of legs coupled with the base, the second pair of legs comprising: a third leg having a top end, a bottom end, and a third foot rotatably attached to the bottom end of the third leg; a fourth leg having a top end, a bottom end, and a fourth foot rotatably attached to the bottom end of the fourth leg; a second screwing mechanism having a first end and a second end disposed between the third leg and the fourth leg, wherein the first end of the second screwing mechanism is attached to the top end of the third leg and the second end of the second screwing mechanism is attached to the top end of the fourth leg and the second screwing mechanism is located above the base, wherein rotation of the second screwing mechanism in a first direction causes the top end of the third leg to be moved apart from the top end of the fourth leg while the third foot attached to the bottom of the third leg is moved towards the fourth foot attached to the bottom of the fourth leg, and rotation of the second screwing mechanism in a direction opposite the first direction causes the top ends of the third and fourth legs to be moved together while the third and fourth feet attached to the bottom ends of the third and fourth legs are moved apart; a boom coupled with the base; and a winch coupled with the boom.