Excavating – Railway graders – Side former
Patent
1980-06-02
1982-10-12
Crowder, Clifford D.
Excavating
Railway graders
Side former
37DIG18, 172 40, A01B 3500, E02F 502
Patent
active
043531750
ABSTRACT:
A resonantly driven tool for forming a trench in base material is disclosed. A channel member is adapted to be aligned with the path of the trench to be formed. The channel member has a floor inclined upwardly toward the rear, and oppositely disposed sides projecting upwardly from the floor. The channel member is open front and rear, and the channel member is advanced along the path of the trench to be formed. A cutting blade is located at the leading end of the floor of the channel member, and is mounted so that it can reciprocate relative to the channel member. The cutting blade engages the material in which the trench is to be formed as the channel member is advanced. A resonant system is provided with an output vibratory in at least near resonance. The resonant system is supported to move with the channel member, and is operatively coupled to the cutting blade to drive the cutting blade intermittently forwardly. The resonantly driven cutting blade thus dislodges the material, and the dislodged material is excavated by the channel member to form the trench.
REFERENCES:
patent: 3145488 (1964-08-01), French
patent: 3245159 (1966-04-01), MacDonald
patent: 3392464 (1968-07-01), MacDonald
patent: 3590927 (1971-07-01), Brouwer et al.
patent: 3633683 (1972-01-01), Shatto, Jr.
patent: 4257648 (1981-03-01), Bodine
Crowder Clifford D.
Resonant Technology Company
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