Hydraulic jib

Claim 2

In a vehicle carrying a hydraulically operated boom and a jib secured to the end of said boom, the combination with said jib for manipulating said jib and loads supported thereby comprising: a. A rotatable shaft passing through the end of said boom; b. an independently rotatable bushing around said shaft where it passes through one side of said boom; c. a sleeve mounted externally to said boom on top of said bushing; d. a jib supported slidably in and extending through both ends of said sleeve; e. hydraulic actuating means for rotating said sleeve and said jib about said shaft; and, f. a sheave mounted at the end of said jib supporting a line for securing a load.

Claim 3

The combination according to claim 1 wherein said bushing is rotated to effect rotation of said jib and a personnel bucket is mounted on said shaft at the other side of said boom, said bucket being independently rotatable by said shaft to maintain attitude.

Claim 4

The combination according to claim 2 in which said hydraulic actuating means is mounted on the interior of said boom.

Claim 5

The combination according to claim 3 in which said bushing is rotated by a chain and sprocket driven by two hydraulic cylinders.

Claim 6

The combination according to claim 1 wherein said bushing is drilled for hydraulic lines and supply lines for hydraulic devices associated with said jib exterior to said boom pass from the interior of said boom and through said bushing for connection to said devices.

Claim 7

The combination according to claim 5 wherein said devices include second hydraulic means for extending and retracting said jib relative to said boom.

Claim 8

The combination according to claim 6 in which said second hydraulic means is a double acting cylinder mounted on said sleeve with its piston rod connected to said jib at the opposite end from that carrying said sheave.

Claim 9

In a vehicle (10) carrying an hydraulically controllable boom (11) and a jib (14) secured to the end of the boom. (11) the combination with said jib (14) comprising: A. First hydraulic actuator means (60-61) mounted within the end of said boom (11) and connected to drive a rotatable support (18, 20) directly supporting said jib (14); b. second hydraulic actuator means (22) secured to said rotatable support (18, 20) and connected to said jib (14 at 25) for extending and retracting said jib (14) relative to said boom (11); and, c. third hydraulic actuator means (36) mounted on said rotatable support (18, 31) connected to and driving a winch (16) mounted on said rotatable support, (18, 31) said winch (16) carryihg a line (15) passing over a sheave (28) on an end of said jib (14) for raising, lowering and supporting loads from the end of the said jib (14), all whereby said jib (14) may be remotely and precisely controlled to facilitate manipulations at the end of said boom (11).

Claim 10

In a vehicle (10) carrying an hydraulically controllable boom (11) and a jib (14) secured to the end of the boom. (11) the combination with said jib (14) comprising: A. First hydraulic actuator means (60-61) mounted within the end of said boom (11) and connected to drive a rotatable support (18, 20) directly supporting said jib (14); b. second hydraulic actuator means (22) secured to said rotatable support (18, 20) and connected to said jib (14 at 25) for extending and retracting said jib (14) relative to said boom (11); and, c. third hydraulic actuator means (36) mounted on said rotatable support (18, 31) connected to and driving a winch (16) mounted on said rotatable support, (18, 31) said winch (16) carryihg a line (15) passing over a sheave (28) on an end of said jib (14) for raising, lowering and supporting loads from the end of the said jib (14), all whereby said jib (14) may be remotely and precisely controlled to facilitate manipulations at the end of said boom (11).

Claim 11

The combination according to claim 8 wherein said jib is mounted on a bushing rotatable about a shaft passing through said boom, said bushing containing drilled passages for hydraulic supply lines passing from the interior of said boom to devices associated with said jib.

Claim 12

The combination according to claim 9 wherein said first hydraulic actuator rotates said jib through a chain and sprocket, said second hydraulic actuator is a double acting hydraulic cylinder mounted on a sleeve integral with said bushing and slidably supporting said jib and said third hydraulic actuator is an hydraulic motor geared to drive said winch.