Spike puller and method for pulling a railroad spike of a track
AssigneeRobel Bahnbaumaschinen GmbH
InventorsOtto Widlroither, Bernhard Koch, Thomas Hoelzlwimmer
Life of this patent
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Abstract
A spike puller for pulling a railroad spike of a track includes a housing, a linear displacement unit mounted at the housing, and a claw unit for gripping the railroad spike. The claw unit is displaceable in a linear manner relative to the housing in a displacement direction by using the linear displacement unit. The linear displacement unit includes a hollow tube which is guided in the housing. An electric drive unit electrically operates the linear displacement unit. A method for pulling a railroad spike of a track is also provided.
Claims21
A spike puller for pulling a railroad spike of a track, the spike puller comprising:
- a housing;
- a linear displacement unit mounted at said housing, said linear displacement unit including a hollow tube guided in said housing, and said linear displacement unit including a mounting flange and a threaded spindle, said mounting flange being disposed between said threaded spindle and said hollow tube, and said mounting flange being disposed completely within said hollow tube;
- a claw unit for engaging a railroad spike, said claw unit being displaceable by said linear displacement unit in a linear manner relative to said housing in a displacement direction;
- and
- an electric drive unit for electrically operating said linear displacement unit.
A spike puller for pulling a railroad spike of a track, the spike puller comprising:
- a housing;
- a linear displacement unit mounted at said housing, said linear displacement unit including exactly one hollow tube guided in said housing, as seen in a direction transverse to an axis of rotation of said linear displacement unit;
- a claw unit for engaging a railroad spike, said claw unit being displaceable by said linear displacement unit in a linear manner relative to said housing in a displacement direction;
- an electric drive unit for electrically operating said linear displacement unit;
- and
- a claw fastening element fastening said claw unit at said hollow tube.
A spike puller for pulling a railroad spike of a track, the spike puller comprising:
- a housing;
- a linear displacement unit mounted at said housing, said linear displacement unit including a hollow tube guided in said housing, said linear displacement unit including a mounting flange and a threaded spindle, and said mounting flange being disposed between said threaded spindle and said hollow tube;
- a claw unit for engaging a railroad spike, said claw unit being displaceable by said linear displacement unit in a linear manner relative to said housing in a displacement direction;
- said hollow tube having an undercut encompassing said mounting flange in said displacement direction;
- and
- an electric drive unit for electrically operating said linear displacement unit.
A method for pulling a railroad spike of a track, the method comprising:
- providing a spike puller for pulling a railroad spike of a track, the spike puller including:
- a housing,
- a linear displacement unit mounted at the housing, the linear displacement unit including a hollow tube guided in the housing, the linear displacement unit including a mounting flange and a threaded spindle, the mounting flange being disposed between the threaded spindle and the hollow tube, and the mounting flange being disposed completely within the hollow tube,
- a claw unit for engaging a railroad spike, the claw unit being displaceable by the linear displacement unit in a linear manner relative to the housing in a displacement direction, and
- an electric drive unit for electrically operating the linear displacement unit;
- positioning the spike puller above the railroad spike and engaging the claw unit around the railroad spike;
- and
- driving the linear displacement unit by using the electric drive unit, causing the hollow tube to be linearly displaced and guided within the housing and the railroad spike to be pulled out of the track.
Dependencies are inferred from the claim text.