Excavating – Railway graders – Side former
Patent
1989-08-14
1990-07-10
Taylor, Dennis L.
Excavating
Railway graders
Side former
37118A, 37141R, 37DIG12, 37195, 414722, 414725, 414726, E02F 330, E02F 3407
Patent
active
049398555
ABSTRACT:
The payload capacity of an excavating dipper or bucket for a power shovel or dragline is increased by providing an upper bucket portion having support brackets and the strength to support the rated load of the dipper and a disposable lower portion having opposed sidewalls and a bottomwall of a material thickness less than the upper sidewalls and topwall. The lower sidewalls are secured to the upper sidewalls by interference fitted retaining pins disposed in machined bores formed in the upper sidewalls and the lower sidewalls, respectively. The upper sidewalls may be modified to provide spaced-apart plate members which define a slot for receiving the lower sidewall portions, respectively.
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patent: 3307277 (1967-03-01), Kondracki
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patent: 4081919 (1978-04-01), Teach
patent: 4457085 (1984-07-01), Arnold
patent: 4550512 (1985-11-01), Felstet
patent: 4691455 (1987-09-01), Newman
Atlantic Richfield Company
Martin Michael E.
McBee J. Russell
Taylor Dennis L.
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