Railways – Track layers – Tamper
Reexamination Certificate
2000-07-12
2002-05-14
Morano, S. Joseph (Department: 3617)
Railways
Track layers
Tamper
C104S014000, C104S010000, C173S124000, C173S122000, C173S049000
Reexamination Certificate
active
06386114
ABSTRACT:
BACKGROUND THE INVENTION
1. Field of the Invention
This invention relates to a railroad track ballast tamping device and, more specifically, to a split tool tamper having a single tamping tool which may be operated independently of any adjacent tamping tools.
2. Description of the Prior Art
The ballast underlying a railroad track must be compressed during the installation of new track or repairing old track. The typical means for compressing the railroad track ballast is to vibrate and/or tamp the ballast using a tamping machine. A tamping machine typically consists of two pairs of tamping tools connected to a common vibrating device. The vibrating device causes the tamping tools to oscillate rapidly about the axis of an output shaft. Typically a pair of tamping tools are in a spaced relation to each other so that the tamping tools are located on either side of a rail. One pair of tamping tools is located on one side of a railroad tie and the other pair of tamping tools is located on the opposite side of the railroad tie. For example, a twin shaft vibrator may be provided with tool shafts which are approximately 504 mm apart. Typically, the tamping device is mounted on a railroad vehicle.
Because tamping devices are structured to have a pair of tamping tools which are positioned to be on either side of the railroad rail, the area between converging and/or diverging rails, such as at a railroad switch or crossing, cannot be accessed by the parallel tamping tools. To overcome this disadvantage, railroad tamping tools mounted on single side of a rail have been manufactured, see e.g., U.S. Pat. No. 5,343,810. This tamping device, however, still provides two tamping tools which are operated by a single vibrating device. This configuration has similar disadvantages to the prior art in that substantial portions of the ballast adjacent to the switch and/or crossing may remain untamped.
There is, therefore, a need for a tamping device which is capable of tamping substantially all of the railroad ballast including those portions of ballast disposed adjacent to switches and/or crossings.
There is a further need for a railroad tamping device having a tamping tool which is capable of acting independently of other tamping tools of the tamping device.
SUMMARY OF THE INVENTION
These needs and others are satisfied by the invention which provides for a split tool tamping device having a single tamping tool extending therefrom. The split tool tamping device may be mounted on a railroad vehicle adjacent to other tamping devices. The split tool tamping device, however, may be operated independently of any adjacent tamping device.
This invention includes a vibrating device, such as a motor having a rotating output shaft, a conversion device which converts the rotational motion of the hydraulic motor to an oscillating rotational motion, a tool shaft connected to the conversion device, and a tamping tool connected to the tool shaft. The motor may be mounted on a frame which is attached to a railroad vehicle.
It is an object of this invention to provide a split tool tamper which includes a motor coupled to a frame and a tool shaft coupled at one end to the motor and terminating in a single tamping tool.
It is a further object of this invention to provide a split tool tamper having a motor with a rotating output shaft and a conversion device that converts the rotational motion of the output shaft into a reciprocating rotational motion in a tool shaft.
It is a further object of this invention to provide a split tool tamper that may be coupled to conventional railroad vehicles.
It is a further object of this invention to provide a split tool tamper that does not interfere with the operation of any adjacent tamper.
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Morgan John
Youngman Peter
Eckert Seamans Cherin & Mellott , LLC
Harsco Technologies Corporation
Jenkins David C.
Jules Frantz F.
Morano S. Joseph
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