Swing mechanism for an earth-moving apparatus

Details Swing mechanism for an earth-moving apparatus Swing mechanism for an earth-moving apparatus

1988-08-19

1990-02-27

Spar, Robert J.

Material or article handling

Vertically swinging load support

Shovel or fork type

4146955, B66F 914

Patent

active

049041495

ABSTRACT:
A swing mechanism for an earth-moving apparatus having a main frame and a swing frame which is pivoted at the main frame about a vertical axis. The swing mechanism includes a pair of slide members which are in sliding engagement with a pair of slide surfaces. Each slide member is operatively connected to the swing frame by means of a flexible connector such as a chain. One end of each chain is connected to each slide member and the opposite end of the chain is connected to the swing frame. Each slide member is driven along the slide surface by means of a fluid actuator. One end of the fluid actuator is connected to the slide member, the opposite end of the fluid actuator is connected to the main frame. The slide surfaces extend outwardly from a front to back midplane of the main frame in opposite directions. Outward movement of one of the slide members along its respective slide surface by its respective fluid actuator causes the swing mechanism to move the boom toward one side of the main frame and movement of the other slide member outwardly along its respective slide surface by its respective fluid actuator causes the swing mechanism to move the boom to the opposite side of the main frame.

REFERENCES:
patent: 3891104 (1975-06-01), Pilch

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