Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1987-12-03
1989-01-24
Spar, Robert J.
Material or article handling
Vertically swinging load support
Shovel or fork type
414728, B60P 154
Patent
active
047998504
ABSTRACT:
A self-propelled vehicle maneuverable in an underground mine includes an elongated body having a forward end portion with a boom assembly mounted thereon. The boom assembly includes a pair of boom members that are telescopically arranged to vary the overall length of the boom. A material handling device is secured to the end portion of the boom assembly and is operable to perform various material handling operations in the mine. A support arrangement secures the boom assembly to the front of the vehicle. A pair of double acting piston cylinder assemblies are mounted on the mobile body and are connected to the support arrangement for laterally swinging the boom assembly relative to the elongated body. The boom assembly is also connected to the support arrangement for upward and downward pivotal movement independently of the lateral swinging movement by operation of a pair of pivoting cylinders. The pair of pivoting cylinders are positioned laterally of a longitudinal axis of the boom assembly and are connected to the support arrangement and to the sides of the boom assembly. With this arrangement the boom assembly is extensible and movable laterally and vertically to position the material handling device at a preselected position relative to the vehicle.
REFERENCES:
patent: 2949201 (1960-08-01), MacAlpine et al.
patent: 4199299 (1980-04-01), Petitto, Sr. et al.
patent: 4225282 (1980-09-01), Nordstrom et al.
Petitto Angelo A.
Petitto James L.
Petitto, Sr. Angelo S.
Petitto Mine Equipment, Inc.
Price, Jr,. Stanley J.
Spar Robert J.
Underwood Donald W.
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