Patent
1976-11-04
1978-03-14
Paperner, L. J.
74 892, E02F 375
Patent
active
040786803
ABSTRACT:
Swing mechanism for a backhoe, crane or other earthmoving apparatus which includes a main frame, a rotatable turret supported by the frame, the drive mechanism includes a pair of hydraulic rams supported by the frame in partially coextensive lateral relationship. The drive strokes of said rams are generally in opposite directions. Associated with each ram, the drive mechanism includes a pivotable lever and an elongate flexible member connected to generally opposite points on the turret to rotate the turret in opposite direction. The flexible members extend from the pivotable levers in generally opposite directions to points of engagement with an arcuate member and then extend at least partially about the circumference of the arcuate member to their point of connection to the turret. The surface of the arcuate member engaged by said flexible members has different radial dimensions measured from its axis of rotation at circumferentially spaced locations about the periphery of the arcuate member whereby the angular or rotational velocity of said turret versus the linear velocity of the piston rods of the said rams is maintained at a predetermined ratio throughout a horizontal arc of movement of the turret.
REFERENCES:
patent: 2365168 (1944-12-01), Billings
patent: 3033380 (1962-05-01), Dorkins
patent: 3184980 (1965-05-01), Schell
patent: 3891104 (1975-06-01), Pilch
patent: 3894641 (1975-07-01), Pilch
patent: 4003484 (1977-01-01), Jones et al.
Paperner L. J.
Ware Machine Service Inc.
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