Backhoe swing mechanism

Details Backhoe swing mechanism Backhoe swing mechanism

1981-12-10

1983-12-06

Paperner, Leslie J.

Material or article handling

Vertically swinging load support

Shovel or fork type

4146955, 414694, E02F 372

Patent

active

044190409

ABSTRACT:
An improved hydraulic control system is disclosed for operating the swing tower and boom of a backhoe. The system includes a pair of hydraulic motors interconnected between the backhoe frame and swing tower. A sequencing valve is hydraulically associated with respective ends of the hydraulic motors and operates to direct the flow of pressurized hydraulic fluid to the motors for improved performance as they rotate the swing tower and boom. A hydraulic cushioning circuit associated with the sequencing valve provides an improved arrangement for cushioning of the swing mechanism as the swing tower and boom are moved toward either of their travel stops without the use of conventional cushioning devices.

REFERENCES:
patent: 3047171 (1962-07-01), Long
patent: 3407946 (1968-10-01), Pilch
patent: 3530766 (1970-09-01), Pilch
patent: 3630120 (1971-12-01), Carlson et al.
patent: 3757642 (1973-09-01), Schuermann
patent: 3872985 (1975-03-01), Short
patent: 4085855 (1978-04-01), Worback
patent: 4138928 (1979-02-01), Pilch
patent: 4341501 (1982-07-01), Maurer et al.

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