Power shovel

Details Power shovel Power shovel

1993-11-18

1995-11-28

Taylor, Dennis L.

Excavating

Cable-operated

Scoop or bucket

37444, 414718, E02F 330

Patent

active

054696470

ABSTRACT:
A power shovel comprising a frame, a winch mounted on the frame, a boom having a lower end mounted on the frame and having an upper end, a sheave pivotally mounted on the boom adjacent the upper end of the boom, a dipper handle mounted on the boom for pivotal movement relative thereto and relative to a dumping position, a dipper mounted on the forward end of the dipper handle and having closed and open conditions for respectively containing and dumping a load and further including a latch mechanism for releasably securing the dipper in the closed condition, and a hoist rope extending over the sheave and having one end connected to the winch and an opposite end connected to the dipper such that when the dipper handle is in the dumping position the hoist rope exerts on the dipper a force biasing the dipper to the open condition when the latch mechanism is released.

REFERENCES:
patent: 1478622 (1923-12-01), Toussaint et al.
patent: 1550938 (1925-08-01), Walsh
patent: 1765893 (1930-06-01), Wayner et al.
patent: 1905191 (1933-04-01), Snow, Jr.
patent: 2152907 (1939-04-01), Miller
patent: 2610753 (1952-09-01), Morin
patent: 2719641 (1955-10-01), Pilch
patent: 3278057 (1966-10-01), Drollinger et al.
patent: 3508674 (1970-04-01), Schneider
patent: 3580405 (1971-05-01), Siegel et al.
patent: 4939855 (1990-07-01), McCreary, Jr.
Subsection D Dipper Components (Harnischfeger Corporation).

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