Lifting devices

Claim 2

A lifting device comprising in combination a lifting beam, spaced arms fixed to the beam and extending away from the longitudinal axis of the beam, wheels rotatably mounted upon said spaced arms at the outermost of the latter, means for rotating the beam about its longitudinal axis, a linkage comprising a frame pivotally attached to the beam and to the said means, the point of pivotal attachment of the frame to the said means being adjustable in position towards and away from the beam, a ground wheel rotatably mounted upon said frame, and, at least one lifting hook mounted upon the beam for rotation therEwith.

Claim 3

A lifting device as claimed in claim 1, in which said frame is pivotally attached to further arms fixed to the beam and spaced apart along the length thereof.

Claim 4

A lifting device for lifting a load comprising, in combination, a. a lifting beam (1) having a longitudinal axis, b. a frame member (14-21), c. means (5-10) pivotally attached to said lifting beam (1) for rotating the latter about its longitudinal axis, d. a pivotal coupling means (13a-13b) interconnecting said rotating means (5-10) and said frame member (14-21), e. first arm means (22a) extending radially from said beam (1) and fixed relatively to said longitudinal axis and pivotally attached (at 22) to said frame member (14-21), f. second and third arm means (2, 2,) fixed to the beam (1) for rotation therewith and spaced apart along the longitudinal axis of the beam, the second and third arm means (2, 2,) extending radially from the beam (1) to support the latter above ground at a height determined by the angular position of the beam, and, g. attachment means (26) rotatable with said beam providing at least one point of attachment for attaching a load to the beam.

Claim 5

A lifting device for lifting a load comprising, in combination, a. a lifting beam (1) having a longitudinal axis, b. a frame member (14-21), c. means (5-10) pivotally attached to said lifting beam (1) for rotating the latter about its longitudinal axis, d. a pivotal coupling means (13a-13b) interconnecting said rotating means (5-10) and said frame member (14-21), e. first arm means (22a) extending radially from said beam (1) and fixed relatively to said longitudinal axis and pivotally attached (at 22) to said frame member (14-21), f. second and third arm means (2, 2,) fixed to the beam (1) for rotation therewith and spaced apart along the longitudinal axis of the beam, the second and third arm means (2, 2,) extending radially from the beam (1) to support the latter above ground at a height determined by the angular position of the beam, and, g. attachment means (26) rotatable with said beam providing at least one point of attachment for attaching a load to the beam.

Claim 6

A lifting device as claimed in claim 3, wherein: h. said frame member (14-21) comprises bifurcations (15) extending from said pivotal coupling (13a-13b) toward said beam (1), and wherein i. said first arm means (22a) comprises two parallel arms of equal length spaced apart along said beam (1) and pivotally attached to said bifurcations, respectively.

Claim 7

A lifting device as claimed in claim 4, wherein: j. said attachment means (26) comprises a plurality of lifting attachments (25-26) mounted upon said beam (1) so as to be rotatable therewith, said lifting attachments having lifting surfaces (26) lying along a line joining the respective points (22) of pivotal attachment of said bifurcations (15) to said first arm means (1).

Claim 8

A lifting device as claimed in claim 3, further comprising: h. wheels (3) rotatably mounted upon said second and third arm means (2,2) at their outer ends for facilitating rotation of said beam and movement of the device along the ground.

Claim 9

A lifting device as claimed in claim 3, wherein: h. said pivotal coupling means (13a-13b) is adjustable in position towards and away from said beam (1).

Claim 10

A lifting device as claimed in claim 3, further comprising: h. a front wheel (20) rotatably mounted upon said frame member (14-21).