Earth working – With drive means for tool or cleaner – Vibrating tool
Patent
1980-03-20
1982-11-16
Shapiro, Paul E.
Earth working
With drive means for tool or cleaner
Vibrating tool
30277, 37DIG18, 37141R, 172816, 173 49, 173100, E02F 376
Patent
active
043591027
ABSTRACT:
A bulldozer having a transversely elongate cutter blade closely spaced from the bottom edge of the mold board is disclosed. The cutter blade is mounted for reciprocal motion in forward and aft directions relative to the mold board. Unidirectional force impulses are applied to the cutter blade in a forward direction to drive the blade intermittently forward without aft motion. Preferably, the unidirectional force impulses are applied by first and second matched force transmitting beams. Each beam has two divergent approximately straight legs that meet at a juncture to form an acute, approximately 90.degree. angle, a node at the juncture, an input anti-node at the end of one leg, and an output anti-node at the end of the other leg at the input frequency. A source of vibrations at or near the resonant frequency is coupled to the input anti-node and the output anti-node is disposed in spaced aft relationship from the cutter blade within striking distance thereof. The beams are mounted adjacent to the rear surface of the mold board so the mold board extends into the space between the legs with the input anti-node disposed near the top of the mold board and the output anti-node disposed near the bottom of the mold board.
REFERENCES:
patent: 3145488 (1964-08-01), French
patent: 3367716 (1968-02-01), Bodine
patent: 3443327 (1969-05-01), Martin
patent: 3478450 (1969-11-01), Cunningham
patent: 3628265 (1971-12-01), Galis
patent: 3633680 (1972-01-01), Shatto, Jr.
patent: 3770322 (1973-11-01), Cobb et al.
patent: 3795070 (1974-03-01), Bronson et al.
patent: 4229045 (1980-10-01), Gurries
patent: 4230369 (1980-10-01), Gurries
Society Of Automotive Engineers, Inc. "Soil Excavation Improvement From Bulldozer Blade Oscillation" 9/78.
Automotive Engineering, 11/78 pp. 74-80.
Gurries Raymond A.
Stormon Harry J.
Resonant Technology Company
Shapiro Paul E.
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