Counter weighted lifting beam
AssigneeSelby Arm, Inc.
InventorsWilliam Setzke, Cloyd R. Selby
Life of this patent
Estimating the term…
Abstract
A counterbalanced lifting beam designed to lift and permit balancing of heavy loads. The lifting beam includes an internal counterweight that is adapted to be hydraulically adjusted by use of a manually operated control mechanism. The lifting beam also includes a rigid elongated lifting tower to add stability to the lifting beam and includes a centralized storage cabinet, which stores control mechanism and increases the weight concentration and the overall stability of the beam. Storage batteries and hydraulic control equipment are fully encased in the storage cabinet. As the lifting beam is held by the crane cable and a swivel, the beam can be moved in three dimensions.
Claims19
A counterweighted lifting beam for raising a load from a first elevation to a second elevation when used with a hoisting mechanism, the lifting beam comprising:
- an elongated housing member forming a beam having a first end and a second end, said housing member including a chamber;
- a load securing member attached to said first end of said housing member, said load securing member adapted to permit attachment of the load;
- a counterweight slidably disposed within said chamber;
- a counterweight positioning mechanism adapted to vary the position of said counterweight within said housing member;
- an elongated and vertically oriented lifting tower rigidly secured to the top and sides of said housing member approximately midway between said first end and said second end of said housing member, said lifting tower having a base portion and a top portion and at least one linear sidewall extending substantially the length of said lifting tower;
- an attachment member secured to said top portion of said lifting tower, said attachment member adapted to permit attachment of said lifting tower to the hoisting mechanism;
- a storage unit positioned adjacent a side of said lifting tower, opposite said first end and above said housing member, said storage unit adapted to store system components that operate said counterweight positioning mechanism, wherein the positioning of said storage unit and said system components proximate the midpoint of said lifting beam concentrates overall lifting beam mass at the midpoint of said beam, increasing overall lifting beam stability;
- a control unit adapted to activate said counterweight positioning mechanism to vary the position of the counter weight with respect to said housing member to vary the angular inclination of the housing member.
A counterweighted lifting beam for raising a load from a first elevation to a second elevation when used with a hoisting mechanism, said lifting beam comprising:
- an elongated beam having a first end and a second end, said elongated beam including a space therein defining a passageway;
- a load securing member attached to said first end of said beam, said load securing member adapted to permit the attachment of the load to said first end of the beam;
- a counterweight slidably disposed within the passageway of the beam;
- a counterweight adjustment mechanism associated with said beam and adapted to vary the position of said counterweight within said passageway;
- an elongated and substantially vertical lifting tower rigidly secured to the top and sides of said elongated beam approximately midway between said first end and said second end of said elongated beam;
- a storage unit positioned adjacent a side of said lifting tower, opposite said first end and above said beam, said storage unit adapted to store system components that operate said counterweight adjustment mechanism, wherein the positioning of said storage unit and said system components proximate the midpoint of said lifting beam, concentrates overall lifting beam mass at the midpoint of said beam, increasing overall lifting beam stability;
- an attachment member secured to a top portion of the lifting tower, the attachment member adapted to permit attachment to the hoisting mechanism;
- a hydraulic control assembly adapted to control the movement of said hydraulic arm to vary the position of said counterweight with respect to said beam.
A lifting beam with an adjustable counterweight for raising a load from a first elevation to a second elevation comprising:
- an elongated beam having a first end and a spaced apart second end, the first end adapted to permit securing the load;
- the elongated beam including a cavity positioned within the elongated beam;
- a counterweight, slidably disposed within the cavity of the elongated beam, the counterweight adapted to offset the weight of the load at the first end of the elongated beam;
- a counterweight adjustment mechanism adapted to vary the position of the counterweight within the elongated beam;
- a lifting tower rigidly secured at about the center of gravity of the elongated beam, the lifting tower rigidly secured to the top and sides of said elongated beam;
- a storage unit positioned adjacent to a side of said lifting tower, opposite said first end of said elongated beam and above said beam, said storage unit adapted to store system components to operate said counterweight positioning mechanism, wherein the positioning of said storage unit and said system components proximate the center of gravity of the elongated beam, concentrates overall lifting beam mass at the midpoint of said beam, increasing overall lifting beam stability.
Dependencies are inferred from the claim text.