Excavating bucket

Details Excavating bucket Excavating bucket

1984-01-16

1986-12-09

Burr, Edgar S.

Excavating

Clamshell bucket

Common pivot

175242, 175292, B66C 302

Patent

active

046271805

ABSTRACT:
An open ended cylindrical casing is provided with a pair of semicircular blades rotatably mounted to the lower open end of the casing so that the blades may be rotated from a digging position where they project downward from the lower end of the casing to a flat position, substantially forming a bottom to the lower end of the casing. To excavate a cylindrical hole the casing is dropped with the blades in the projecting position into the ground causing the blades to dig in a shovel-like manner. By rotating the blades upward substrate is lifted into the casing, and the casing is pulled deeper into the substrate. Lifting the casing out of the hole, the blades act as a bottom to the casing carrying dirt within the casing.

REFERENCES:
patent: 904680 (1908-11-01), Burrows
patent: 2499508 (1950-03-01), Karhu
patent: 3185226 (1965-05-01), Robbins
patent: 3497021 (1970-02-01), Burrell
patent: 3621923 (1971-11-01), Allard
patent: 4106225 (1978-08-01), Schnabel, Jr.

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