Mobile boring rig

Details Mobile boring rig Mobile boring rig

1992-07-29

1993-12-14

Friedman, Carl D.

Static structures (e.g., buildings)

Mechanism operated relatively movable shaft assembly

Fluid pressure actuated

52116, D04H 1234

Patent

active

052691071

ABSTRACT:
Mounted on a vehicle (10), the mast (20) of a boring rig is supported by an erection hinge (18). The erection hinge (18) is provided on a first carriage (19) having a support cylinder attached (28) to it for the purpose of support and erection of the mast (20). The hydraulic erection cylinder (24), attached to the vehicle (10), is connected to the second carriage (21). The mast (20) is extended to an oblique angle by the hydraulic erection cylinder (24). The final phase of the erection of the mast (20) is completed by the retraction of the secondary take-in cylinder (27), which connects the two carriages together. When in a horizontal position, the mast (20) can be guided in a longitudinal direction in order to have a more favorable position of the center of gravity on the vehicle (10).

REFERENCES:
patent: 2683584 (1954-07-01), Selberg
patent: 2955431 (1960-10-01), Taylor, Jr.
patent: 3109523 (1963-11-01), Moller
patent: 3205627 (1965-09-01), Gyongyosi
patent: 3220585 (1965-11-01), McCartney et al.
patent: 3805463 (1974-04-01), Lang et al.
patent: 4269395 (1981-05-01), Newman et al.
patent: 4368602 (1983-01-01), Manten

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