Welded structure of a power arm

Details Welded structure of a power arm Welded structure of a power arm

1979-12-10

1981-06-30

Ridgill, Jr., James L.

Static structures (e.g., buildings)

Machine or implement

212266, 414694, E04C 332

Patent

active

042755425

ABSTRACT:
The invention relates to a power arm made of a bent, welded structure defined by two lateral plates and by an upper plate and a lower plate welded to the lateral plates and comprising a box having an upper cap and a lower base forming a cross piece of width equal to the spacing of the lateral plates, disposed between these plates in the zone of their elbow and welded to said plates. The cap and the case join, forming two angles, along two lines which pass substantially through the neutral axis of each lateral plate. The invention finds particular application in the manufacture of the boom of a hydraulically operated shovel.

REFERENCES:
patent: 484026 (1892-10-01), Larimer
patent: 2316519 (1943-04-01), Labaree
patent: 3405496 (1968-10-01), Van Der Meer
patent: 3882654 (1975-05-01), Yancey

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