Excavating – Railway graders – Side former
Patent
1975-06-20
1976-12-21
Eickholt, E.H.
Excavating
Railway graders
Side former
214138R, 214140, 214768, E02F 502
Patent
active
039979873
ABSTRACT:
A backhoe has a main boom mounting a short shaft in preloaded thrust bearings. A gear casing floatingly mounted on the main boom carries a worm driven by a chain-and-sprocket drive to drive a worm gear on the shaft. A jib boom fixed to the lower end of the shaft journals a yoke about one axis and a bucket is pivotal on the yoke about a transverse axis. A crowd cylinder mounted on the boom is connected by linkage and a universal joint to the bucket, and a hydraulic motor mounted in a cup-like trunnion member on the lower end of the jib boom and journaling the yoke has its drive splined to the yoke for tilting the bucket sidewise.
REFERENCES:
patent: 2411498 (1946-11-01), Billings
patent: 2718718 (1955-09-01), Bartlett
patent: 2878951 (1959-03-01), Pilch
patent: 3087636 (1963-04-01), Weaver
patent: 3220578 (1965-11-01), Pilch
patent: 3247986 (1966-04-01), Eyler et al.
patent: 3425572 (1969-02-01), Brach
patent: 3653131 (1972-04-01), Pilch
patent: 3776403 (1973-12-01), Billings
patent: 3871538 (1975-03-01), Miller et al.
patent: 3881612 (1975-05-01), Wells
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