Vented hydraulic vibrator assembly

1. A housing assembly for a tamping machine vibrating device, said housing assembly comprising:

a plurality of sidewalls defining a substantially enclosed space;

at least one sidewall having at least one opening structured to allow an effective amount of air to pass therethrough;

the at least one opening is disposed adjacent a maximum diameter of an irregular flywheel disposed in the housing assembly, the at least one opening includes a dust filter; and

whereby an effective amount of air may pass between said enclosed space and the atmosphere.

2. The housing assembly of claim 1 wherein said at least one opening is an elongated slot.

3. The housing assembly of claim 2 wherein said irregular flywheel has with a diameter and structure to rotate about an axis and wherein:

said elongated slot is an arcuate slot.

4. The housing assembly of claim 3 wherein:

said at least one opening includes a plurality of openings disposed in a generally circular pattern.

5. A vibrating device for a tamping machine comprising:

a housing assembly having a plurality of sidewalls defining a substantially enclosed space;

at least one housing assembly sidewall having at least one opening structured to allow an effective amount of air to pass therethrough;

an irregular flywheel rotatably disposed in said enclosed space and structured to rotate about an axis of rotation;

a motor coupled to, and structured to rotate, said irregular flywheel;

wherein the rotation of said irregular flywheel causes air within said enclosed space to move out of said enclosed space via said housing assembly sidewall at least one opening which further causes air from the atmosphere to be drawn into said enclosed space via said housing assembly sidewall at least one opening; and

wherein the amount of air exchanged is an effective amount of air.

6. The vibrating device of claim 5 wherein said at least one opening is an elongated slot.

7. The vibrating device of claim 6 wherein:

said elongated slot is an arcuate slot; and

said slot disposed adjacent to the maximum diameter of said flywheel.

8. The vibrating device of claim 7 wherein:

said at least one opening includes a plurality of openings disposed in a generally circular pattern.

9. The vibrating device of claim 8 wherein:

each said arcuate elongated slot has a center generally corresponding to the axis of rotation of said flywheel.

10. The vibrating device of claim 5 wherein said at least one opening includes a dust filter.

11. The vibrating device of claim 5 wherein:

said flywheel includes a body having a disk portion and a perimeter portion; and

said perimeter portion having a thick section and a thin section, said thick section extending over about 180 degrees of the circumference of said disk portion, said thin section extending over the other about 180 degrees of the circumference of said disk portion.

12. The vibrating device of claim 11 wherein:

said at least one opening is an elongated slot;

wherein said flywheel thick section has a leading edge;

wherein said flywheel thin section has a leading edge;

wherein, as said flywheel rotates about said axis of rotation, air adjacent to said flywheel thick section leading edge and within said enclosed space is expelled from said enclosed space via said elongated slot; and

whereas, as said flywheel rotates about said axis of rotation, air adjacent to said flywheel thin section leading edge and disposed outside of said enclosed space is drawn into said enclosed space via elongated slot.

13. The vibrating device of claim 12 wherein:

said elongated slot is an arcuate slot; and

said slot disposed adjacent to said flywheel perimeter portion.

14. The vibrating device of claim 13 wherein:

said at least one opening includes a plurality of openings disposed in a generally circular pattern.

15. A tamping machine structured to be coupled to a rail vehicle, said rail vehicle structured to travel over a railroad having a plurality of ties and an underlying ballast, said tamping machine comprising:

at least one tamping tool having a mounting plate, an actuation device, a vibrating device, and at least one elongated tool head, said actuation device and said vibrating device coupled to said mounting plate;

said actuation device structured to pivot said at least one tool head between a first position, wherein said at least one tool head is spaced from a tie, and a second position wherein said tool head is adjacent to a tie;

said vibrating device structured to vibrate said at least one tool head;

said at least one tool head having an upper end and a lower end, said at least one elongated tool head upper end coupled to said mounting plate, said at least one elongated tool head lower end structured to be inserted into said ballast;

a frame assembly, coupled to said rail vehicle and to move said at least one tool head between a position above said ballast and a position wherein said at least one tool head is partially inserted into said ballast;

said at least one elongated tool head coupled to said frame assembly;

said vibrating device having a housing assembly, an irregular flywheel, and a motor;

said housing assembly having a plurality of sidewalls defining a substantially enclosed space;

at least one housing assembly sidewall having at least one opening structured to allow an effective amount of air to pass therethrough;

said irregular flywheel rotatably disposed in said enclosed space and structured to rotate about an axis of rotation;

said motor coupled to, and structured to rotate, said irregular flywheel; and

wherein the rotation of said irregular flywheel causes air within said enclosed space to move out of said enclosed space via said housing assembly sidewall at least one opening which further causes air from the atmosphere to be drawn into said enclosed space via said housing assembly sidewall at least one opening and

wherein the amount of air exchanged is an effective amount of air.

16. The tamping machine of claim 15 wherein said at least one opening is an elongated slot.

17. The tamping machine of claim 16 wherein:

said elongated slot is an arcuate slot; and

said slot disposed adjacent to the maximum diameter of said flywheel.

18. The tamping machine of claim 17 wherein:

said at least one opening includes a plurality of openings disposed in a generally circular pattern.

19. The tamping machine of claim 18 wherein:

each said arcuate elongated slot has a center gradually corresponding to the axis of rotation of said flywheel.

20. A housing assembly for a tamping machine vibrating device, said housing assembly comprising:

a plurality of sidewalls defining a substantially enclosed space;

at least one sidewall having at least one opening structured to allow an effective amount of air to pass therethrough;

an irregular flywheel disposed in the enclosed space, the irregular flywheel being rotatably disposed in said enclosed space and structured to rotate about an axis of rotation, the at least one opening is disposed adjacent a maximum diameter of the irregular flywheel;

whereby an effective amount of air may pass between said enclosed space and the atmosphere.