Method and apparatus for scarifying a railroad crib

Details Method and apparatus for scarifying a railroad crib Method and apparatus for scarifying a railroad crib

1984-10-29

1985-12-31

Crowder, Clifford D.

Excavating

Railway graders

241194, E02F 522

Patent

active

045611980

ABSTRACT:
A railroad scarifying device is adapted to automatically distinguish between ballast and ties. The device includes a mounting piece or drum on which a plurality of hammer arms are pivotably attached. The hammer arms are pulled outwardly by the centrifugal force of rotation of the drum and include hammer teeth to pound and fracture hardened ballast in between railroad ties. The hammer arms have a tie protector or tie protecting portion which strikes ties and causes the hammer arms to retract inwardly such that the teeth avoid damaging contact with the ties. The hammer arms include a stop slot which cooperates with a stop pin mounted on the drum so as to limit the range of pivoting of the hammer arms relative to the drum.

REFERENCES:
patent: 2045689 (1936-06-01), Armstrong
patent: 2463499 (1949-03-01), Thornley
patent: 2534880 (1950-12-01), Praytor et al.
patent: 3005274 (1961-10-01), Kershaw
patent: 3611681 (1971-10-01), Blanton et al.
patent: 4120106 (1978-10-01), Smith et al.

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