Twin-scrape dozer

Details Twin-scrape dozer Twin-scrape dozer

1994-09-06

1996-09-17

Melius, Terry Lee

Earth working

Scraper between front and rear ground supports of vehicle

Plural scrapers

172826, 37410, 37409, E02F 376

Patent

active

055559441

ABSTRACT:
A twin-scrape dozer, capable of maintaining a satisfactory balance during earth loading, of loading a larger quantity of earth, of efficiently conveying earth even over a soft ground, and of adjusting the rate at which earth is scattered, has a crawler type tractor (1, 1A) equipped with a traveling mechanism, a front earth loading and ejecting device (10, 50), and a rear earth loading and ejecting device (30, 70). The traveling mechanism has track frames (2, 2A) at right and left sides of the vehicle (1, 1A), track shoes (5, 5A) and drive units (6, 6A). The earth loading and ejecting devices are provided at the front and rear parts of the vehicle (1, 1A), and are installed to be vertically movable with lift cylinders (13, 33, 56, 78). Each of the earth loading and ejecting devices is provided with a scraper (21, 34, 53, 75) and a bowl member (14, 41, 61, 81) pivotably connected together by pivot pins (22, 42, 62, 83). Each scraper (21, 34, 53, 75) and bowl member (14, 41, 61, 81) are controlled by a bowl cylinder (23, 43, 63, 84), so that the bottom of the bowls (20, 40, 60, 80) can be opened and closed by extending and retracting the respective bowl cylinders (23, 43, 63, 84). The excavating angle of the scrapers (21, 34, 53, 72) can be changed by extending and retracting the tilt cylinders (16, 36) or by adjusting the length of variable length braces (57, 73).

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