Material or article handling – Vertically swinging load support – Shovel or fork type
Patent
1989-12-08
1991-10-15
Spar, Robert J.
Material or article handling
Vertically swinging load support
Shovel or fork type
74471R, 74481, 74491, 74525, E02F 342
Patent
active
050569856
ABSTRACT:
A control mechanism for operating a backhoe is disclosed wherein the controls are adaptable to be configured in a selected one of a two lever system, a three lever system, or a four lever system. The control mechanism includes a first pivot axis on which the control levers are pivotally mounted and a second pivot axis on which a series of bell cranks are pivotally mounted. Various linkages interconnect the control levers with the bell cranks, and the bell cranks with hydraulic valve spools in a manner in which the valve body does not have to be reconfigured depending upon which the control system is utilized. The control levers are configured with a pivot casting having a bent control rod threadably received therein, the position of which is fixed by a lock nut permitting the control handle to be positioned in the orientation desired by the operator.
REFERENCES:
patent: 3752337 (1973-08-01), Randolph et al.
patent: 4019401 (1977-04-01), Drone
patent: 4397336 (1983-08-01), Godfrey
patent: 4419040 (1983-12-01), Pedersen et al.
patent: 4736647 (1988-04-01), Shimoie et al.
Ball Garry L.
Johnson Russell I.
Steinkamp John O.
Ford New Holland Inc.
Marquette Darrell F.
Miller Larry W.
Seemar Frank A.
Spar Robert J.
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