Load handling apparatus
AssigneeCaterpillar Inc.
InventorJames Wilson
Life of this patent
Estimating the term…
Abstract
A load handling apparatus for a vehicle includes a telescopic boom pivotably mounted on a chassis frame of the vehicle. The boom has first, second, third, and fourth sections telescopically engaged in sequence and mounted so as to be slidable relative to one another. A first hydraulic ram is adapted to move the first and second sections together by way of a synchronizing arrangement, and a second hydraulic ram moves the third section relative to the fourth section. The first section carries a load receiving device and a hydraulic unit for manipulating the load receiving device.
Claims5
Load handling apparatus comprising a telescopic boom having first to fourth sections (1-4) telescopically interengaged in sequence, the first section (1) carrying a hydraulic unit (19) for manipulating a load receiving device, a first hydraulic ram (29) extending longitudinally of the boom (11), being connected to the second and third sections (2,3), and being operable to move the second section (2) between a fully retracted position and a fully extended position relative to the third section (3), synchronising means (36-42) connected between the first, second and third sections for moving the first section (1) between a fully retracted position and a fully extended position relative to the second section (2) in response to movement of the second section (2) relative to the third section, a second hydraulic ram (43) extending longitudinally of the boom (11), being connected to the third and fourth sections (3,4), and being operable to move the third section (3) between a fully retracted position and a fully extended position relative to the fourth section (4), a first rolling hose (51) communicating between the hydraulic unit (19) and a first connector (52) mounted on the third section (3), a second rolling hose (53) communicating between the first connector (52) and a second connector (54) mounted on the fourth section (4), and a third rolling hose (57) communicating between the first hydraulic ram (29) and a third connector (58) mounted on the fourth section (4).
Dependencies are inferred from the claim text.