Static structures (e.g. – buildings) – Mechanism operated relatively movable shaft assembly – Tilts relative to base
Patent
1981-12-11
1983-09-27
Murtagh, John E.
Static structures (e.g., buildings)
Mechanism operated relatively movable shaft assembly
Tilts relative to base
410 56, 410 65, 414401, B66C 2336, E01F 1100
Patent
active
044060980
ABSTRACT:
A drilling ramp for a mobile drilling rig of the type having a wheeled vehicle and a mast substructure, wherein the substructure includes four legs, two of which serve to mount power hydraulic jacks and two of which serve to mount leg locating sockets. The ramp includes a substantially planar foundation structure adapted to support the drilling rig. Longitudinal guide bars and transverse chocks are mounted on the foundation structure to guide and position wheels of the drilling rig. Two jack locating members are mounted on the foundation structure, each of which defines a respective socket sized and positioned to interlock with respective ones of the two jacks included in the substructure. In addition, two manually operated jack screws are mounted on the foundation structure in alignment with the sockets on the rear legs of the substructure. Once the jacks have been engaged in the sockets of the ramp, the jack screws can be raised in order to provide support for the rear legs of the substructure. The preferred embodiment includes a cylinder attachment structure in the ramp which is used to mount the lower end of a transfer arm hydraulic cylinder to the ramp.
REFERENCES:
patent: 1780277 (1930-11-01), Seeley et al.
patent: 3307722 (1967-03-01), Godille
patent: 3437056 (1969-04-01), O'Leary
patent: 3543693 (1970-12-01), Thornton et al.
Deaver Pete E.
Hamill Odis F.
Lingafelter Jerry K.
Chilcot Jr. Richard E.
Murtagh John E.
Walker-Neer Manufacturing Co. Inc.
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